Use a two-tailed independent sample t-test to answer this question. A new drug is being tested...

Use a two-tailed independent sample t-test to answer this question. A new drug is being tested to see if it reduces the number of backaches. Do these samples of number of monthly backaches from eight volunteers who are taking the drug and eight who are not taking the drug show a significant reduction in the mean number of monthly backaches (α= 0.05)? Identify the hypothesis statements, test statistic, p-value, and your decision. Also, construct and report the 95% confidence interval for each group. Analyze the confidence intervals - Do you come to the same conclusion as the t-test results? Why or why not?

New Drug Group: 4 4 3 5 4 5 4 6

Control Group: 5 6 6 6 8 6 6 7

Expert Solution

The confidence intervals of the two groups do not overlap and the endpoints of the confidence interval of control group is greater than that of the new drug group. This shows that the mean number of backaches is reduced in the new drug group.

Any query please comment below.

orchestra answered 1 year ago

The test statistic of a two-tailed t-test for a sample size of 12 was found to...

The test statistic of a two-tailed t-test for a sample size of 12 was found to be 2.1. At a significance level of α = 0.05 ,which of the following statements is correct? Group of answer choices a.The P-value is smaller than 0.05 b.We fail to reject the Null hypothesis c.The test statistic is in the critical region d.The alternative hypothesis is H1: A market researcher wants to estimate the proportion of households in the Bay Area who order food...

state the critical values for a two-independent same t-test given the following conditions: a. two-tailed test...

state the critical values for a two-independent same t-test given the following conditions: a. two-tailed test a=.01, total df=26 b. one-tailed test, lower tail critical a=.01,df=15 for each group c. two- tailed test, a=.05, n=12 in each group d.one-tailed test, upper tail critical, a=.05 n for both groups combined is 30

5. TWO (INDEPENDENT) SAMPLE T-TEST (a) Describe the independent samples t-test for two means briefly. How...

5. TWO (INDEPENDENT) SAMPLE T-TEST (a) Describe the independent samples t-test for two means briefly. How does it do it? (b) State the null and the alternative hypothesis. (c) State the assumptions. (d) State the formula for the test statistic. (e) State the rejection rule with (How to reject the null hypothesis) (f) Give an real life example of how we can use the independent samples t-test for two means.

TWO (INDEPENDENT) SAMPLE T-TEST (a)Describe the independent samples t-test for two means brieﬂy. How does it...

TWO (INDEPENDENT) SAMPLE T-TEST (a)Describe the independent samples t-test for two means brieﬂy. How does it do it? (b) State the null and the alternative hypothesis. (c) State the assumptions. (d) State the formula for the test statistic. (e) State the rejection rule with (How to reject the null hypothesis) (f) Give an real life example of how we can use the independent samples t-test for two means.

Identify the assumptions for a two-independent sample t test

Given a result of t (40) = 1.90 for a two-tailed paired samples t-test, answer the...

Given a result of t (40) = 1.90 for a two-tailed paired samples t-test, answer the following: 10) What is the sample size? 11) What is the tcv? 12) What is the tobt? 13) What should the researcher conclude (accept or reject the null)?

1. Identify the correct critical value for tin a two sample (independent), two-tailed test with 30...

1. Identify the correct critical value for tin a two sample (independent), two-tailed test with 30 degrees of freedom at a .05level of significance. 2. Identify the correct critical value for tin a two sample (independent), one-tailed test with 40 degrees of freedom at a .01level of significance. 3. The level of significance (a) represents the probability of making a(n) _____________. 4.A Type I error can be described as .

calculate: PART A You are performing a two-tailed t-test with a sample size of 37 If...

calculate: PART A You are performing a two-tailed t-test with a sample size of 37 If α=0.2α=0.2, and your test statistic is t=−2.02t=-2.02, do you: Reject Null Hypothesis Fail to Reject Null Hypothesis PART B: You are performing a left-tailed z-test If α=.005α=.005, and your test statistic is z=−2.43z=-2.43, do you: Fail to Reject Null Hypothesis Reject Null Hypothesis PART C: You are performing a left-tailed z-test If α=.025α=.025, and your test statistic is z=−1.91z=-1.91, do you: Fail to...

2.2. Indicate which test (paired samples (ie dependent) t-test, independent two samples t-test, one-sample t-test, independent...

2.2. Indicate which test (paired samples (ie dependent) t-test, independent two samples t-test, one-sample t-test, independent samples z-test) is most appropriate for the following situations : A. Comparison of weight gain of two groups of 18 cows where one group was raised following standard practices and the other group was raised following “organic” standards. B. Comparison of scores on a fitness test of Olympic-class distance runners (n=20) with the national average score of people of a similar age range (22-31...

Generally, we compare two independent sample means via independent two-sample t test. Is it possible to...

Generally, we compare two independent sample means via independent two-sample t test. Is it possible to compare two independent sample means using ANOVA? please give me a different answer/ explanation. I know someone already asked about this question here, please don't copy it and give me the same answer. THANKS.

Question