Does listening to music affect how many words you can memorize? Student researchers tried to answer this
Question:
Null: The average of the difference in number of words memorized (no music with music) is 0 (μd = 0).
Alternative: The average of the difference in number of words memorized (no music with music) is greater than 0 (μd > 0).
The students found the following results in terms of number of words memorized:
a. What is the explanatory variable in this study? Is it categorical or quantitative?
b. What is the response variable in this study? Is it categorical or quantitative?
c. What is the observed statistic in this study?
d. Assuming a true null hypothesis, we simulated this study and found 1,500 mean differences that are shown in the null distribution below. Based on where the observed statistic lies in this distribution, does the p-value appear to be fairly small?
e. Th e standard deviation of the null distribution is 0.974. Use this to find the standardized statistic for this test.
f. Based on your standardized statistic from part (e), is there strong evidence that people can memorize words better when music is not playing compared to when it is? Explain.
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
Step by Step Answer:
Introduction To Statistical Investigations
ISBN: 9781118172148
1st Edition
Authors: Beth L.Chance, George W.Cobb, Allan J.Rossman Nathan Tintle, Todd Swanson Soma Roy