What deccision be made about null hypothesis

Reference no: EM13134261

A researcher is investigating the effectiveness of a new study-skills training program for elementary school children. A sample of n=25 third-grade children is selected to participate in the program and each child is given a standardized achievement test at the end of the year. For the regular population of third-grade children, scores on the test form a normal distribution with a mean of 150 and a standard deviation of 25. The mean for the sample of M=158

a. Identifiy the independent and dependent variables for this study.

b. Assuming a two-tailed test, state the null hypothesis in a sentence that includes the independent variable and the dependent variable

c. Using symbols, state the hypotheses (H0 and H1) for the two-tailed test.

d. Calculate the test statistic (z-score) for the sample.

e. What deccision should be made about the null hypothesis, and what decision should be made about the effect of the program.

Reference no: EM13134261

Questions Cloud

Why would you select the percentage of sales method : Why would you select the percentage of sales method on calculating doubtful accounts as opposed to the percentage of receivables method? Which method favors the income statement? Which method favors the balance sheet?

Information about ellipse : Transform each equation to standard form. Then find the center, foci, major and minor axes, and ends of each latus rectum. Draw the curve

Determine alexandra basis in the land : Dove Corporation had purchased the land as an investment three years ago for $375,000, and the land was distributed subject to a $270,000 liability. Alexandra took the land subject to the $270,000 liability. What is Alexandra's basis in the land?

How much will mahmet employer withhold in social security : mahmet eraned wages of 108,600 during 2011 he is single and claims two withholding allowances how much will mahmet's employer withhold in social security taxes for the year?

What deccision be made about null hypothesis : What deccision should be made about the null hypothesis, and what decision should be made about the effect of the program.

Prove that profit maximization implies cost minimization : Long run average costs rise as output increases if and only if the production function is homogeneous of degree p?(0,1). True or false? Explain your answer.

Community health professionals need to address health issues : Why do community health professionals need to address health issues differently for different age groups in a community? Provide several specific examples to support your answer.

Calculate marshall debt ratio : Marshall Networks, Inc. has a total asset turnover of 2.5% and a net profit margin of 3.5%. The firm has a return on equity of 17.5%. Calculate Marshall's debt ratio.

Mean difference in times between experimental medication : currently available medication is -9.4 minutes with a standard deviation of 2.8 minutes. Construct a 95% CI for the mean difference in times between the experimental and currently available medication.

User Account

All Pages