Reconsider the previous exercise about memorization with and without music. a. The standard deviation of the null
Question:
a. The standard deviation of the null distribution shown is 0.974. Use this to find an approximate 95% confidence interval for the mean difference in the number of words memorized (no music music) for the population of interest.
b. Based on your confidence interval from part (a), is there strong evidence that people can memorize words better when music is not playing compared to when it is? Explain.
Data from previous question
Does listening to music affect how many words you can memorize? Student researchers tried to answer this question by having 20 subjects listen to music while trying to memorize words and also had the same 20 subjects try to memorize words when not listening to music. They randomly determined which condition was done first for each of their subjects. Here are their hypotheses:
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:
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