1. The mean score for Scrabble players at the neighborhood center is u = 215 points. The players read a book that claims it can raise scores significantly. After reading the book, a team of 25 players obtains a score of M = 218 points, with s- 25. Do the data α- indicate that reading the book leads to increases in the players' scores? Test with a = 05. a. Formulate the hypotheses. b. Determine the critical value(s). c. Calculate the test statistic.

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1. The mean score for Scrabble players at the neighborhood center is u = 215 points.
The players read a book that claims it can raise scores significantly. After reading the
book, a team of 25 players obtains a score of M=218 points, with s= 25. Do the data
indicate that reading the book leads to increases in the players' scores? Test with a =
.05.
a. Formulate the hypotheses.
b. Determine the critical value(s).
c. Calculate the test statistic.
d. Calculate and evaluate Cohen's d and r?.
e. What decision can you make and what does it indicate?
f. What type of error could you be making and what would that mean?
Transcribed Image Text:1. The mean score for Scrabble players at the neighborhood center is u = 215 points. The players read a book that claims it can raise scores significantly. After reading the book, a team of 25 players obtains a score of M=218 points, with s= 25. Do the data indicate that reading the book leads to increases in the players' scores? Test with a = .05. a. Formulate the hypotheses. b. Determine the critical value(s). c. Calculate the test statistic. d. Calculate and evaluate Cohen's d and r?. e. What decision can you make and what does it indicate? f. What type of error could you be making and what would that mean?
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