explain the logic of one-sided and two-sided significance tests and the scientific advantage of using one or the other.

Q: On average, a textbook author makes two word-processing errors per page on the first draft of her…

A: Given that  X~Poisson (λ) λ=2

Q: For Number 1-3:  Medical researchers have determined so-called normal intervals for a person’s blood…

A: Normal distribution is the type of continuous distribution. It shows the symmetrical distribution of…

Q: Provide an algebraic proof that the least squares estimator is not consistent when Cov(x,e)=0 with…

A: Hint: When Cov(x,ε)=0 then error term should be zero in y=β1+β2E(x)+ε

Q: 4. Find P7 A. Z = -3.21 B. z = -1.48 C. z = 1.48 D. z = 0.74

A: we had given data  standard normal distribution z~N(0,1) we have to fond 7h percentile

Q: Given that the rank correlation coefficient for 19 pairs of data is rs = 0.369, test the claim that…

A: Given, r critical is 0.369 Level of significance is 0.05 and sample is 19. Degree of freedom is = n…

Q: The

A:

Q: 2=(2>60) (2<80) 5. A The ages of the thousands of residents of a retirement community are normally…

A: Mean=70, standard deviations σ= 4

Q: Imagine you are doing an Independent-Samples t-test.  For Sample 1, you get n=10, M=17.2, SS=120.…

A: Data given For Sample 1, you get n=10, M=17.2, SS=120. For Sample 2, you get n=12, M=19.1, SS=110

Q: 68% of U.S. adults have very little confidence in newspapers. You randomly select 10 U.S. adults.…

A: Given that  Number of trials n=10  Probability of success p=0.68 X~bin(n,p)

Q: If 10% of all disk drives produced on an assembly line are defective, what is the probability that…

A: From the provided information, Probability of defective (p) = 0.10 Sample size (n) = 5

Q: When using the Central Limit Theorem, what is the "magic number" for sample size that allows you to…

A: the "magic number" for sample size that allows you to use the C.L.T even if the population is not…

Q: A graduating class reported starting salaries represented on the following frequency table.…

A: According to the given information in this question We need to find mean of the given data

Q: 1. A study of interior designers' opinions with respect to the most desirable primary color fo…

A: Probability: The probability explains the chance of an outcome between 0 and 1 where 0 means no…

Q: Express the confidence interval 33.1%±9% in interval form. Express the answer in decimal format…

A: Given 33.1%±9%

Q: 3. An automatic machine inserts mixed vegetables into a plastic bag. Past experience revealed that…

A: Introduction: It is required to find the probability of selecting four packages that are…

Q: Suppose that X is a random variable with mean 30 and standard deviantion 4. Suppose Y is a random…

A:

Q: Assume that a randomly selected subject is given a bone density test. Those test scores are normally…

A: Given the test scores are normally distributed with mean=0 and standard deviation=1

Q: The accompanying data set includes volumes (ounces) of a sample of cans of regular Coke. The summary…

A: From the provided information, Sample size (n) = 36 Sample mean (x̄) = 12.188 Sample standard…

Q: 6.A furniture company wanted to see if people in the United States like their new logo. Which choice…

A: Given that  A furniture company wanted to see if people in the United States like their new logo.

Q: If the expected return on the market is 8% and the risk free rate is 4% and the expected return is…

A: Expected return on the market=8% Risk free rate = 4% Expected return= 12%  Market risk premium=?

Q: The manager of High Point Sofa and Chair, a large furniture manufacturer located in North Carolina,…

A: Given data: Worker Job Performance Score Aptitude Test Score Union Membership Abbott 58 5 0…

Q: How many combinations of 5 objects are there when selected 3 at a time?

A: Given that there are 5 object and we have to select 3 at a time.

Q: A student organization of 12 wants to select a president, a vice-president, and a treasurer. How…

A: A student organization of 12 wants to select a president, a vice president, and a treasurer.i.e.…

Q: A, B, and C, using Excel, create an appropriate graph that would show the central tendency as well…

A: SET A SET B SET C 5.07 11.89 8.76 4.3 12.14 8.31 4.94 11.05 8.32 4.12 12.5 8.65 3.87 12.98…

Q: of fruits spoiled frequency 0 3 1 14 2 11 3 9 4 9 5 2 6 2 7 3 14 1 25 1 build a steam and leaf chart…

A: Data given number of fruits spoiled frequency 0 3 1 14 2 11 3 9 4 9 5 2 6 2 7 3…

Q: The claim is that for 11 AM body temperatures of females, the mean is less than 98.6°F. The sample…

A: Answer: - Given, Claim: For 11am body temperatures of females, the mean is less then 98.6°F.…

Q: (8) ( It has been proven by biologist Shinichiro Wada that some small snails in Japan are able to…

A: Given  95% CI for population proportion (0.096,0.204)

Q: (a) The following table lists the total water usage in South Africa in billions of liters per day.…

A: Data for water use according to years are given. Least square exponential equation=? Prediction of…

Q: Consider a dataset of two paired variables, X and Y, that have the following properties: n=10 >0 SE₂…

A:

Q: According to a recent survey of 1359 voters, 31% feel that the president is doing an Construct a 88%…

A: given data  sample size = n = 1359 sample proportion = 0.31 88% ci for p.

Q: Given the raw data, create a box plot that would show central tendency and variability of data in…

A: Boxplot is basically a visual representation of 5 number summary which are : minimum, first…

Q: mean of the set of numbers is 17. Find the value x, if sample values are:   12, 18, x, 21, 13

A: Given that  Mean = 17  The data are 12, 18, x, 21, 13

Q: Is the average time to complete an obstacle course shorter when a patch is placed over the right eye…

A:

Q: 18. Which statement is true about the quartile and percentile? A. The median is the 50th percentile,…

A: Let Q1 denote the first quartile Q2 be the second quartile Q3 be the third quartile Note:  According…

Q: The production of a glass needs three main raw materials: sand, limestone, and soda ash. A glass…

A: 1 gram glass = $2.3 Sand = $3 / gram  Lime stone= $0.5/gram Soda ash = $2.10/gram  Sand needed = 3*…

Q: a. Given that the water taxi was rated for a load limit of 3500 lb, what is the maximum mean weight…

A: It is given that  Mean, μ = 181 Standard deviation, σ = 38

Q: ) Which of the following represents the closest relationship between two variables? Or= -0.50…

A:

Q: You are playing a card came, and the probability that you will win a game is p = 0.88. If you play…

A: Given n=601, p=0.88

Q: The following monthly sales of chocolate boxes (in thousands of AUS dollars) have been recorded for…

A:

Q: A random sample of 36 mid-sized cars tested for fuel consumption gave a mean of 26.4 miles per…

A: Given that  x̄ = 26.4 ,  ? = 2.3 , n = 36

Q: Three people have their birthdays in the same week. What is the probability that the three…

A: (a) Let 3 people be M1, M2  and M3. Also, we know that there are 7 days in a week.  M1 may have…

Q: Let π represent the percentage of all male students who would receive a grade of B on this test. Use…

A: It is given that the data in cross-tabulation form. Total students i.e, sample size n = 48…

Q: As part of a study on how people of different ages use mobile technology, each person in a sample…

A: Consider n1 and n2 as the sampled no. of individuals in the age groups of "20 to 39" and "40 to 49"…

Q: Q1.Do students perform worse when they take an exam alone than when they take an exam in a classroom…

A: Since there are 2 different questions, I solved Q1 as per Bartleby rules. Please repost the Q2 as…

Q: Consider the variable X whose mean and variance are given respectively by Hx = 27.2 and Var(X) =8.…

A: GivenμX=27.2Var(X)=8

Q: 12) Construct a 99% confidence interval for the population mean, μ. Assume the population has a…

A:

Q: Driver’s Education. In order to determine whether or not a driver’s education course improves the…

A: Score After (x1): n=7 Mean(M1)= (92+86+...97)/7 M1 =90.71 df1=n-1 = 6   Score After (x2): n=7…

Q: The most famous geyser in the​ world, Old Faithful in Yellowstone National​ Park, has a mean time…

A: Given that.   X~N( μ , ?)   μ=85     , ?=21.25   Z-score =( x - μ )/?   NOTE:- According to bartleby…

Q: (1) An airline finds that each passenger who reserves a seat fails to turn up with probability For…

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…

Q: Psychological and educational tests, including MMPI are often designed so they have a mean of 50 and…

A: Given: Mean μ=50 Standard deviation σ=10