Access over 20 million homework documents through the notebank

Get on-demand Q&A homework help from verified tutors

Read 1000s of rich book guides covering popular titles

Showing Page:

1/4

Sign up to view the full document!

Sign up to view the full document!

Sign up to view the full document!

Q1A school board is evaluating a learning system designed to increase literacy skills. A standardized test measuring reading skills is performed on some students, both before and after using the learning system. The following data were obtained:student before after difference 1 96 96 0 2 101 105 4 3 108 112 4 4 97 96 -1 5 108 114 6 6 93 97 4 7 95 100 5 8 91 92 1 9 114 113 -1 You want to answer the question: "Is there evidence that the learning system has increased the test scores?a) What is the null hypothesis?b) What is the alternative hypothesis?c) How may degrees of freedom are there?d) What is the sample standard deviation of the difference in the test scores?e) What is the value of the test statistic?f) What is the p-value?Ansa)Null Hypothesis - learning system has remains same or decreased the test scores , Ho: Ud<=0b)Alternative Hypothesis - learning system Increased the test scores , Ho: Ud > 0c)Degrees of freedom = n-1 = 9-1 = 8d)sample standard deviation of the difference in the test scores = Pooled Variance = 2.7e)Test-statistic to = -2.71 i.e | to | = 2.71 ( it lies between 2 to 3 )f)P-value of the test is = 0.0131Q2Measurements of ...

Purchase document to see full attachment

Purchase document to see full attachment

Review

Anonymous

Outstanding. Studypool always delivers quality work.

Anonymous

Thanks for the help.

Anonymous

<3 it, thanks for saving me time.