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High school students were interested in a teacher's claim that the longer the length of
time (hours) that a student studies for a test, the higher the test score. The students
collected the data and the teacher did the regression analysis with the following results.
To test the null hypothesis that no relationship exists between study time and score,
what are the F test statistic and the F-critical value using the 0.05 significance level?
The Spearman coefficient of rank correlation method ____________ the observations in
each sample.
The ______ chart portrays the number of defects per unit.
Two movie reviewers gave their ratings (0 to 4 stars) to seven movies released this past
month as follows:
The Wilcoxon signed-rank test of difference is to be used.
What is the critical value at the 5% level of significance?
A major credit card company has determined that customers charge between $100 and
$1,100 per month. If the average monthly amount charged is uniformly distributed, the
percent of monthly charges between $600 and $889 would be ______.
