What degrees of freedom would younormally expect a t test to have when N1 = 40 and N2 = 55?

Q: A random sample of 50 lumbar supports used by go-cart racers were subjected to a crash test, and…

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Q: For a one tailed test in which a treatment is suppose to increase scores, a researcher obtains T(8)…

A: The test statistic value is 1.90.

Q: The police department wanted to know if 911 calls came in more often on some days of the weekend.…

A: Number of categories, k = 3 The degree of freedom is, df=k-1   =3-1   =2 The level of significance…

Q: 31. How many t-tests would a researcher use if s/he wants to compare 4 (four) experimental…

A: # How many t- test  will be used by researchers to compare 4 experimental conditions ??

Q: A drug manufacturer claims that a drug of its own production is 90% effective in relieving allergies…

A: Hypothesis testing is used to make conclusions about the population parameter. The hypothesis test…

Q: Let u denote the actual population mean amount of mercury in tuna per ounce. The hypotheses for this…

A: Given : μ = 10.13 σ = 2.03

Q: Suppose we want to compare the length of hospital stay for patients with the same diagnosis at two…

A: a) The sample size for two hospitals is different. b) The wilcoxon Rank Sum Statistic. Let W be the…

Q: According to Cohen's conventions, an R2 of 0.19 is considered to be a(n) effect size. erroneous…

A: We have given that, According to  Cohen’s convention, an R2 is 0.19.

Q: In a survey of 200 boys, of which 75 were intelligent, 40 had educated fathers; while 85 of the…

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Q: feels that the commute in his city is less and wants to publicize this. He randomly selects 25…

A: The hypotheses are given as follows: Null hypothesis: µ=25.4. Alternative hypothesis: µ<25.4.…

Q: Use the following information for questions 1 and 2.  Independent random samples of individuals…

A: Given that,sample one, x1 =40, n1 =200, p1= x1/n1=0.2sample two, x2 =27, n2 =175, p2=…

Q: α = 0.01 for a left-tailed-test,  Find the critical t value if n =   23

A: It is given that the level of significance is 0.01 and test is left-tailed. The sample size is 23.

Q: Suppose you are testing Ho : μ = 104 against Ha μ< 104. From an SRS of 70 individuals, you compute =…

A: It is interpreted that, the study involves 70individuals (i.e., n sample size=70). And the sample…

Q: g. What conditions must be satisfied for the test results to be valid?

A: Test is that whether the true value of μ differs from 95 meters.

Q: Find the P-value (to 4 decimals) for a x test with d. f. = 16 and STS X = 18.4 if the test is: %3D…

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Q: The test statistic of z = 0.96 is obtained when testing the claim that p &gt; 0.4. b. Find the…

A: b. The test statistic of z = 0.96 is obtained when testing the claim that p &gt; 0.4. That is, the…

Q: α = 0.01 , for a two-tailed test.   Find the critical t value if n =  12

A: It is given that the test is two tailed test.

Q: The degrees of freedom for the t-test for mean are O1 On None of the above On – 1

A: The test that is used to test the significance of the single population mean is a one-sample t-test.

Q: a. Alex's z-score is b. Boris z -score is __ C. performed on exam better than

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Q: In testing: Ho: u = 40 vs Ha: u &gt; 40, where n=16, the value of the t-test statistic was t =…

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Q: A researcher conducts a hypothesis test using a sample from an unknown population. If df = 30 for…

A: The degrees of freedom is given as 30.

Q: A chi-square test for goodness of fit has df = 2. How many categories were used to classify the…

A: Identify the correct option for the number categories that used to classify the individuals in the…

Q: 19. The test statistic of z = 2.01 is obtained when testing the claim that p # 0.345.

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Q: SS = 749.5 %3D SS = 830 %3D a. Use a one-tailed test with a = .05 to determine whether these data…

A: Given Data : we need to calculate standard deviations for both the samples , where the SS are given…

Q: A research center claims that 24% of adults in a certain country would travel into space on a…

A: Given that p is the population proportion of successes, where a success is an adult in the country…

Q: What is the difference between z test and t test

A: z-test is a statistical method which is used in order to determine that whether the two-sample means…

Q: Find the P-value (to 4 decimals) for a x test with d. f. = 20 and STS X = 12.4 if the test is: a.…

A: a. The P-value of χ2-distribution for test statistic 12.40 at 20 degrees of freedom can be obtained…

Q: The test statistic of z 1.00 is obtained when testing the claim that > 0.3.

A: In order to test the claim that population proportion is greater than 0.3, that is, p&gt;0.3,…

Q: As a result, Cohen's d is a statistic that measures the severity of the consequence, which it cannot…

A: Cohen's d is a measure of the magnitude of effect and cannot be negative. Treat you result as the…

Q: The sample data for a t-test of Ho:u=15 and Hạ: µ >15 are sample mean=16.2, s=3.1 and n=18. Use a =…

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Q: medical researcher says that ould be required to be vaccinated. In a random sample of 300 adults in…

A: We have given that  Sample size n= 300 Population proportion p =76%=0.76 Sample proportion p^=…

Q: A two-tailed test, computed t-value = 1.845, df = 10 O 0.025 > 1/2 p > 0.05 0.05 > p> 0.10 O 0.05 >…

A: For the given data Select the correct choice

Q: Find the P-value (to 4 decimals) for an F-test with d. f.n = 9, d. f.d = 19 and STSF = 16.5 if the…

A: We have given that, Numerator degrees of freedom (d₁) = 9 Denominator degrees of freedom (d₂)=…

Q: 14. A researcher conducts a hypothesis test using a sample from an unknown population. If the t…

A: Given that  Sample taken from a unknown population. t-test statistic is used. Degrees of freedom…

Q: X is the number of defective parts in a sample of 10 randomly selected parts coming from a…

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Q: 6. A population of N = 15 scores has EX = 120. What is the population mean? %3D %3D

A: Given,

Q: Find the P-value (to 4 decimals) for a x test with d. f. = 10 and STS x = 13 if the test is: %3D a.…

A: The degrees of freedom are d.f = 10 And the value of test statistic is = 13

Q: A recent study of 89 people showed they ate sandwiches (S) an average of 21.4 times and…

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Q: for a two tailed test, if z=2.04, find the p value

A: Introduction:Suppose z is the test statistic for a two-tailed z-test, where H0 denotes the null…

Q: *11. Show that for the two-tailed test, the p-value is: Vn(Ỹ – 60) 2 1- 0

A:

Q: A researcher reports the results of a single-sample t-test as t(25) = 1.80. The numerical degrees of…

A: Given, A single-sample t-test as t(25) = 1.80Degrees of freedom (d.f)=n-1=25

Q: Find the critical value F0 for a two-tailed test using α = 0.02, d.f.N = 5, and d.f.D = 10.

A: We have tovfind critical value.

Q: From this geometruc distrubtion. (0.45)8(0.55). What does the 8 represent?  1. Probability of…

A: For geometric setting, there are four requirements need to be fulfilled. These requirements are…

Q: Donna claims that all chocolate candy colors (red, orange, blue, green, yellow, and dark brown) are…

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Q: What is the critical t score if you are testing a one-tailed hypothesis, a level of .05 with df =20…

A: Given that, Level of significance = 0.05 Degrees of freedom = 20

Q: The critical value for the T test for n=10, a=0.05, one tailed is?

A: Degrees of freedom = n-1 = 10-1 = 9 alpha = 0.05

Q: Suppose we do not find enough evidence against the H0 below. Write the appropriate step C. N. H0:…

A: Suppose we do not find enough evidence against theH0 below. Write the appropriate step C.N. H0: μ =…

Q: At a local university, English instructors are supposed to grade essays in a class so that the…

A: Note: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: The average jump height of a normal man is said to be 18 inches. 15 normal males are selected and…

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