Question

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 ? = 515. The teacher obtains a random sample of 1800 students, puts them through the review class, and finds that the mean math score of the 1800 students is 522 with a standard deviation of 119. Complete parts (a) through (d) below. A. H0: ? = 515, H1: ? ? 515 B. H0: ? > 515, H1: ? ? 515 C. H0: ? < 515, H1: ? > 515 D. H0: ? = 515, H1: ? > 515 (b) Test the hypothesis at the ? = 0.10 level of significance. Is a mean math score of 522 statistically significantly higher than 515? Conduct a hypothesis test using the P-value approach. Find the test statistic. t0 = (Round to two decimal places as needed.) Enter your answer in the answer box and then click Check Answer.

          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 ? = 515. The teacher obtains a random sample of 1800 students, puts them through the review class, and finds that the mean math score of the 1800 students is 522 with a standard deviation of 119. Complete parts (a) through (d) below.

A. H0: ? = 515, H1: ? ? 515
B. H0: ? > 515, H1: ? ? 515
C. H0: ? < 515, H1: ? > 515
D. H0: ? = 515, H1: ? > 515

(b) Test the hypothesis at the ? = 0.10 level of significance. Is a mean math score of 522 statistically significantly higher than 515? Conduct a hypothesis test using the P-value approach.
Find the test statistic.
t0 = 
(Round to two decimal places as needed.)
Enter your answer in the answer box and then click Check Answer.

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 ? = 515. The teacher obtains a random sample of 1800 students, puts them through the review class, and finds that the mean math score of the 1800 students is 522 with a standard deviation of 119. Complete parts (a) through (d) below.

A. H0: ? = 515, H1: ? ? 515
B. H0: ? > 515, H1: ? ? 515
C. H0: ? < 515, H1: ? > 515
D. H0: ? = 515, H1: ? > 515

(b) Test the hypothesis at the ? = 0.10 level of significance. Is a mean math score of 522 statistically significantly higher than 515? Conduct a hypothesis test using the P-value approach.
Find the test statistic.
t0 =
(Round to two decimal places as needed.)
Enter your answer in the answer box and then click Check Answer.

Added by Mark G.

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