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Reading Rates Michael Sullivan, son of the author, decided
Chapter 6, Problem 22AYU(choose chapter or problem)
Problem 22AYU
Reading Rates Michael Sullivan, son of the author, decided to enroll in a reading course that allegedly increases reading speed and comprehension. Prior to enrolling in the class, Michael read 198 words per minute (wpm). The following data represent the words per minute read for 10 different passages read after the course.
206 |
217 |
197 |
199 |
210 |
210 |
197 |
212 |
227 |
209 |
(a) Because the sample size is small, we must verify that reading speed is normally distributed and the sample does not contain any outliers. The normal probability plot and boxplot are shown. Are the conditions for testing the hypothesis satisfied?
(b) Was the class effective? Use the α = 0.10 level of significance.
Questions & Answers
QUESTION:
Problem 22AYU
Reading Rates Michael Sullivan, son of the author, decided to enroll in a reading course that allegedly increases reading speed and comprehension. Prior to enrolling in the class, Michael read 198 words per minute (wpm). The following data represent the words per minute read for 10 different passages read after the course.
206 |
217 |
197 |
199 |
210 |
210 |
197 |
212 |
227 |
209 |
(a) Because the sample size is small, we must verify that reading speed is normally distributed and the sample does not contain any outliers. The normal probability plot and boxplot are shown. Are the conditions for testing the hypothesis satisfied?
(b) Was the class effective? Use the α = 0.10 level of significance.
ANSWER:Answer :
Step 1 :
- Yes,the normal probability plot suggests that the data could come from a population that is normally distributed and the boxplot does not show any outliers.