. In a certain senior high school, a study fou 1,100 Grade 12 students use smartphones. is there enough evidence to conclude tha students who are using smartphones is diffe is the appropriate alternative hypothesis? A. Ha: p > .25 В. На р<.25 С. На р-.2 D. Ha: p+ .- . In problem no. 10, what type of test is used?
Q: A sample of n = 25 individuals is selected from a population with u = 80, and a treatment is…
A:
Q: When a new drug is created, the pharmaceutical company must subject it to testing before receiving…
A: To find: What is the Type II Error?
Q: 4. The principal of San Miguel National High School claims that the students in her school have…
A: Given: Population mean, μ=115
Q: Twenty children with autism participated in a study of the effectiveness of augmentative…
A: Given that Statement : Researchers hypothesized that the children would show a higher number of…
Q: The results from an independent-measures t hypothesis test are reported as "t(14) = 2.10, p > 0.05,…
A: Given df=14, level of significance=0.05, two tailed hypothesis
Q: A clinician wishes to test the effectiveness of drugs A, B, and C in preventing deaths from sickness…
A: A) Here need to compare Drug A, Drug B and Drug C are same or Drug A is best followed by Drug C and…
Q: If, in a sample of n=16 selected from a normal population, X=57 and S=20, what is the value…
A:
Q: A sample of n = 25 individuals is selected from a population with ? = 80 and a treatment is…
A: Here n = 25 = 80
Q: A researcher wants to test whether the percentage of the defective items in factory A is more than…
A:
Q: Express the null hypothesis H0 and the alternative hypothesis Ha in notation form in the following…
A: It is given that the mean annual income of workers who are college graduates is greater than…
Q: In a psychology experiment 130 students were classified by major (sciences or humanities) and if…
A: we do this by χ2testH0: choice of major and right/left handedness are independent H1: choice of…
Q: Express the null hypothesis Ho and the alternative hypothesis H1 in symbolic form. Use the correct…
A:
Q: The mean age of bus drivers in Chicago is 52.9 years. If a hypothesis test is performed, how should…
A: Solution: State the hypotheses. Null hypothesis: H0: µ = 52.9 That is, the mean age of bus drivers…
Q: Suppose a group of 1000 smokers (who all wanted to give up smoking) were randomly assigned to…
A: We have given that Sample sizes n1= 193 , n2 = 807 , Favorable cases x1=12 , x2= 242 Level of…
Q: In the criminal justice system, a defendant is innocent until proven guilty. Therefore, the null…
A: a. Type I error: The type I error is the rejection of the null hypothesis when it is actually true.…
Q: A group of doctors is deciding whether or not to perform an operation. Suppose the null hypothesis,…
A: Type 1 error It can be stated as the surgery will go well, but the doctors think that the surgery…
Q: The mean age of professors at a university is greater than 48.2 years. If a hypothesis test is…
A:
Q: Are nursing salaries in Tampa, Florida, lower than those in Dallas, Texas? As reported by the Tampa…
A: Given: Level of significance = 0.05 n1 = 35 x1 bar = $52000 s1 =$5200 n2 = 45 x2 bar = $55300 s2 =…
Q: If a CEO claims that .35 of the organization's employees hold an advanced degree, .60 hold a 4-year…
A: here use test of comparing Proportion
Q: If your null and alternative hypothesis are: H0:μ=72 H1:μ≠72 Then the test is: two tailed left…
A: Given, H0:μ=72H1:μ≠72
Q: Are Republicans just as likely as Democrats to display the American flag in front of their residence…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for…
Q: A large fishing farm with thousands of fish has been treating its fish to stop a spreading fungal…
A: From the given information, A simple random sample of 150 fish is taken and a careful examination…
Q: The mean age of a bus driver in Chicago is 47.4 years. If a hypothesis test is performed to test the…
A: Claim: The mean age of a bus driver in Chicago is 47.4 years The null and alternative hypothesis is,…
Q: If your null and alternative hypothesis are: Họ:P1 = P2 H1:P1 + P2 Then the test is: O left tailed O…
A: Given information- We have given a hypothesis. Null Hypothesis H0:p1=p2Alternate Hypothesis Ha:p1≠p2…
Q: If your null and alternative hypothesis are: H0:p1=p2 H1:p1≠p2 Then the test is:…
A: Null Hypothesis contain 'less than or equal to ( ≤ )' , 'greater than or equal to ( ≥ )' or 'equal…
Q: If your null and alternative hypothesis are. Ho:P1 = P2 H1:Pi < P2 Then the test is: | left tailed |…
A:
Q: If, in a sample of n=25 selected from a normal population, X=51 and S=20, how many degrees of…
A: Given data, n=25 X=51 S=20 degrees of freedom(df)=?
Q: If your null and alternative hypothesis are: H0:p1=p2H0:p1=p2 H1:p1≠p2H1:p1≠p2 Then the test is:…
A:
Q: A city police department is considering replacing thetires on its cars with a new brand tires. If μ1…
A: A city police department is considering replacing the tires on its cars with new brand tires. As…
Q: 8. A researcher claims that 75% of workers favor a shorter workweek. Determine the null and…
A: We need to identify suitable Null and alternative hypothesis
Q: 8. Refer to the Bayer Aspirin problem: How would the alternate hypothesis be written symbolically if…
A:
Q: A local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas.…
A: Consider that home delivery will be successful only if the average time spent on a delivery does not…
Q: Suppose one was interested in determining if higher proportion of males than females feel "wealth…
A: Given:
Q: The National Association of Realtors reported that 26% of home buyers in the state of Florida are…
A: Given: In this case, it is given that 26% of home buyers in the region of Florida are foreigners.…
Q: Suppose you conducted a case-control study to assess whether a positive association exists between…
A: you conducted a case-control study to assess whether a positive association exists between syphilis…
Q: 6. You want to test if the average fun score for campers who prefer boating and camping is higher…
A: "Hi I know that you can’t answer all questions. Can you just answer question 6 please" For Q-6 We…
Q: Express the null hypothesis Ho and the alternative hypothesis Ha in notation form in the following…
A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…
Q: A study done on a marriage counseling course showed that the proportion of couples for which the…
A: Claim:The proportion of couples for which the communicationprogram can prevent divorce is less than…
Q: A test of Ho: p = 0.5 versus Ha: p > 0.5 has a test statistic of z = 2.19. What is the P-value for…
A: We have to find P value for given test statistics.
Q: A presidential candidate claims that the proportion of college students who are registered to vote…
A: Claim : The proportion of college students who are registered to vote in the upcoming election is at…
Q: 9.4 If you use a 0.01 level of significance in a (two-tail) hypothesis test, what is your decision…
A: Given : Significance level, α= 0.01
Q: We would like to test the claim that more than 15% of households use email in the U.S. In a survey,…
A: GivenTh claim is that more than 15% of households use email in the U.S
Q: A researcher claims that 60 individuals is the average number of persons took Pfizer corona vaccine…
A: We have to find out given hypothesis...
Q: If your null and alternative hypothesis are: H0:p=0.75H0:p=0.75 H1:p<0.75H1:p<0.75 Then the test…
A: Null hypothesis: Alternative hypothesis:
Q: What are the null hypothesis (H,) and the alternative hypothesis (H,) that should be used for the…
A: Test is that whether the mean hourly wage has changed this year. The type II error is accepting the…
Q: In a two-tailed test of hypothesis, the sign in the alternative hypothesis is: not equal to b.…
A:
Q: Is our study OR biased towards or away from the null? A)Away from the null.
A: Given:- odd ratio of a case control study that completes and yields a study =4.5 actually true OR…
Q: What is the observed test statistic for this test?
A:
Q: Normally only about 19% of people who try to quit smoking succeed, but sellers of a motivational…
A: Ho = null hypothesis Ha = Alternative hypothesis
Q: If, in a sample of n=16 selected from a normal population, X=58 and S=12, how many degrees of…
A: Given data is n=16 X=58 S=12 the null hypothesis H0: μ=50
Answer 9 - 15 questions, just write the correct letter of the answer and no need to show solution.
Step by step
Solved in 3 steps with 6 images
- A researcher wants to test whether the percentage of the defective items in factory A is more than factory B for at least 20%. Choose the correct hypothesis based on claim. O a. Ho:->0.2 H₂:02 O b. Ho:-₂20.2 H₁:-1 02 O d. Ho-g-0.2 H₁:₁-0.2State the null and alternative hypotheses for the statistical test described below. Your answer should be an expression composed of symbols: =,≠,<,>,μ,μ1,μ2,p,p1,p2,ρ,p^,p^1,p^2,r.Testing to see if there is evidence that the mean of group 1 is not the same as the mean of group 2. H0: vs Ha:In 2014, a survey found that 156 of 800 adults said they learned Japanese by watching anime and having the subtitles in English. Then in 2019 another survey was conducted and found that 240 of 1000 said they learned Japanese by watching anime and having the subtitles in English. Test the claim to see if there is a difference between the years of the surveys using a z-score of -2.08 and a 0.05 level of significance. a) Find Ho and H4. b) Find Test Stat, the critical value and analyze it. c) Write the Conclusion.
- A study was conducted to determine whether automobile repair charges are higher for female customers than for male customers. Twenty auto repair shops were randomly selected from the telephone book. Two cars of the same age, brand, and engine problem were used in the study. For each repair shop, the two cars were randomly assigned to a man and woman participant and then taken to the shop for an estimate of repair cost. The repair costs (in dollars) are given in the table. 'RepairShop' 'Female' 'Male' 1 871 792 2 684 765 3 795 511 4 838 520 5 1033 618 6 917 447 7 1047 548 8 723 720 9 1179 899 10 707 788 11 817 927 12 846 657 13 975 851 14 868 702 15 1323 918 16 791 528 17 1157 884 18 932 702 19 1089 839 20 770 878 a) Which procedure, t or Wilcoxon, is more appropriate in this situation? Why? What assumptions are associated with the more appropriate test? Write the null and alternate hypothesis Are repair costs generally higher for female…Matias is a student of standard 10 in St. Xavier Int. School. He has to study 7 subjects. In the annual exam, the performance of a student in each subject is graded as “G” (good), “M” (moderate) or “B” (bad). If a student gets at least one B or more than 2 M’s or both, s/he can’t get a scholarship next year. If all three grades are equally likely for Matias, what is the probability that he gets a scholarship next year?If 4% of the bottles produced by a company are defective.determine the probabilkities of sample that in 100 bottles (a) two and (b) more than two will be defective
- Rabbani company is a company that sells Muslim clothing. In their products for sale, there are two types of veil production different. The production manager stated that both types have the same percentage of damage/defects. To test the statement taken sample of 300 items from the first product and it turns out that there are 38 items that disabled. Meanwhile, from the second product, 400 items were taken as samples There are 56 defective items. With ?= 1% can the sample obtained be used as evidence to justify the statement?Suppose 204 subjects are treated with a drug that is used to treat pain and 55 of them developed nausea. Use a 0.10 significance level to test the claim that more than 20% of users develop nausea. H1:p>U.20 О В. Но: р30.20 H;: p#0.20 ОС. Но: р» 0.20 H1: p= 0.20 O D. Ho: p= 0.20 H1:p<0.20 Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is 2.49 (Round to two decimal places as needed.) Identify the P-value for this hypothesis test. The P-value for this hypothesis test is (Round to three decimal places as needed.)The results of a common standardized test used in psychology research is designed so that the population mean is 105 and the standard devlation is 30. A subject earns a score of 108. What is the Z-score for this raw score? Z-Score =
- Consider trying to predict the life expectancy of citizens in a country based on the birth rate (per 1000 people) in that country. Here is a scatterplot of the data from a random sample of 50 countries. > ggplot (SampCountries, aes (BirthRate, LifeExpectancy)) + geom_point (color = "darkred")+ labs (title = "Life Expectancy by Birth Rate") + Life Expectancy by Birth Rate 80 - 70 - 10 20 30 40 BirthRate Here is (some of) the R output for the linear model for this data. > LifeBirth.lm summary (LifeBirth. lm) Call: Im (formula = LifeExpectancy BirthRate, data = SampCountries) Residuals: Min 10 Median 30 Маx -7.0592 -2.3047 0.9123 2.5019 5.8358 Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 85.26295 1.03301 82.54 BirthRate -0.63291 0.04492 -14.09 Residual standard error: 3.424 on 48 degrees of freedom Multiple R-squared: 0.8053, Adjusted R-squared: 0.8012 F-statistic: 198.5 on 1 and 48 DF, p-value: < 2.2e-16 LifeExpectancyA study was conducted to examine how anxiety (measured on a metric scale) varies for people from different age groups (<18 years, 19 - 29 years, 30 - 39 years, 40+ years). It was hypothesised that people <18 years old would have the least anxiety of the four age groups. It was also hypothesised that people 40+ years old would have more anxiety than people 19-29 years old. Which of the following would be an appropriate statistical test to conduct, which addresses these hypotheses? Group of answer choices: Factorial ANOVA Multiple Regression Mixed ANOVA Single factor ANOVA Within Subjects ANOVAStudents enrolled in the statistics course will be able to attend the make-up exam before the Aquarium, Central Canteen and Columnar She can go to 3 different venues, including a hall, and study. The first 190 students who went to study 93 of them studied at Aquarium. If the first 190 students are a random sample, students choose Aquarium to study. can it be concluded that Take the significance level as α = 0.01. Explain your answer.