A two-tailed hypothesis test is being used to evaluate a treatment effect with α = 0.05....

A two-tailed hypothesis test is being used to evaluate a treatment effect with α = 0.05. If the sample data produce a z-score of z = -2.0, then what is the correct decision?

A.Reject the null hypothesis and conclude that the treatment has no effect
B.Reject the null hypothesis and conclude that the treatment has an effect
C.Fail to reject the null hypothesis and conclude that the treatment has no effect
D.Fail to reject the null hypothesis and conclude that the treatment has an effect

Solutions

Expert Solution

TOPIC:Testing of hypothesis.

orchestra answered 1 year ago

Next > < Previous

Related Solutions

6.Suppose we have a two-tailed hypothesis test about µ conducted at α = 0.05. If the...

6.Suppose we have a two-tailed hypothesis test about µ conducted at α = 0.05. If the sample size is n = 3, what is the correct rejection region? a.z < -1.960 or z > 1.960 b. t > -2.920 c. t < 2.920 d. t < -4.303 or t > 4.303 7.The BAC levels for a bunch of amateur stage magicians were measured. The same thing for professional magicians! Both distributions are shown below. Which of the following best describes...

Find the correct CV for a two-tailed F test with α=0.05, dfN is 20, and dfD...

Find the correct CV for a two-tailed F test with α=0.05, dfN is 20, and dfD is 11.

test the hypothesis (α = 0.05) that the population proportions of red and brown are equal...

test the hypothesis (α = 0.05) that the population proportions of red and brown are equal (pred = pbrown). You are testing if their proportions are equal to one another. NOTE: These are NOT independent samples, but we will use this approach anyway to practice the method. This also means that n1 and n2 will both be the total number of candies in all the bags. The “x” values for red and brown are the counts of each we found...

You are conducting a multinomial hypothesis test ( α = 0.05) for the claim that all...

You are conducting a multinomial hypothesis test ( α = 0.05) for the claim that all 5 categories are equally likely to be selected. Category Observed Frequency A 23 B 17 C 13 D 19 E 5 What is the chi-square test-statistic for this data? χ2=χ2= What are the degrees of freedom for this test? d.f. = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... less than (or equal...

1. A right tailed hypothesis test with a sample size of n = 56 and α...

1. A right tailed hypothesis test with a sample size of n = 56 and α = 2.5% will have a critical value of ___________? 2. A left tailed hypothesis test with n = 75 and α = 5% will have a critical value of _________.? 3. The conclusion for a hypothesis test that has a test statistic of 2.12 and a critical value of 1.96 will be? 4. The conclusion for a hypothesis test with a test statistic of -1.43...

find the critical t value used to test a null hypothesis if a=0.05 for a two...

find the critical t value used to test a null hypothesis if a=0.05 for a two tailed test with 12 degrees of freedom

While conducting a 1 tailed hypothesis test, you found that the p-value is 0.016. If α...

While conducting a 1 tailed hypothesis test, you found that the p-value is 0.016. If α = 1%, what would your decision be? Question 10 0 out of 6 points The average SAT score of students at NYU is 1340. Professor Mazza believes it is higher. What is the alternative hypothesis? Question 11 0 out of 6 points The average amount of time that students spend studying is 280 minutes per week with a standard deviation of 22 minutes. Dr....

Consider using a one-tailed as well as a two-tailed test of a null hypothesis regard- ing...

Consider using a one-tailed as well as a two-tailed test of a null hypothesis regard- ing an estimated regression coefficient. For the same significance level, which test is more stringent? In other words, for which test does rejection of the null hypothesis automatically imply rejection in the other test as well, but not vice versa? Explain.

Briefly describe a one-tailed vs two-tailed t-test in the context of hypothesis testing?

In a two-tailed test for correlation at α = .05, a sample correlation coefficient r =...

In a two-tailed test for correlation at α = .05, a sample correlation coefficient r = 0.42 with n = 25 is significantly different than zero. True or False

Subjects