5 part question, please help! HW Ch 9 (2) section 9.3 Previous 12 Next Question

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5 part question, please help!

HW Ch 9 (2) section 9.3 Previous 12 Next Question 12 of 12 (1 point) View problem in a pop-UP 9.3 Section Exercise 21b (p-value, table) Weight loss: In of people experienced a group-based behavioral intervention, which involved weekly meetings with a trained interventionist for a period of six months. The following data are the numbers of pounds lost for 14 people, based on means and standard deviations given in the article. Assume the population is approximately normal. Perform a hypothesis test to determine whether the mean weight loss is greater than 20 pounds. Use thea -0.10 level of significance and the P -value method with the table. Question a stady to determine whether counseling could help people lose weight, a sample Check Answer Solve It Guided Solution Show Example Ask My Instructor Link to Textbook 22.5 28.5 7.6 24.1 21.5 12.9 17.3 21.2 37.6 33.8 12.1 36.3 24.1 19.4 Download data Part 1 out of 5 State the appropriate null and alternate hypotheses. Ho H (select) H 1 : ? | (select) This hypothesis test is a (select) -test. Save for Later Submit Assignment

Explanation / Answer

Below are the null and alternate hypothesis
H0: mu = 20
Ha: mu > 20

This is right tailed t - test
Critical value of test statistic is 1.3502

Here, n = 14 , xbar = 22.7786 , mu = 20 and s = 8.9779

Test statistic,
t = (xbar - mu)/(s/sqrt(n))
t = (22.7786 - 20)/(8.9779/(sqrt(14))
t = 1.158

p-value = 0.1338
As p-value is not less than the significance level, we fail to reject the null hypothesis.

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