A math teacher claims that she has developed a review course that increases the scores of students on the math portion of a college entrance exam. Based on data from the administrator of the exam, scores are normally distributed with
The teacher obtains a random sample of
students, puts them through the review class, and finds that the mean math score of the
with a standard deviation of
Complete parts(a) through (d) below.
(a) State the null and alternative hypotheses. Let
be the mean score. Choose the correct answer below.
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