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 u = 520. The teacher obtains random sample f 2200 students, puts them through the review class, and finds that the mean math score of the 2200 students is 526 with a standard deviation of 114. Complete parts (a) through (d) below. (a) State the null and alternative hypotheses. Ho: H 520, H: > 520 (b) Test the hypothesis at the a= 0.10 level of significance. Is a mean math score of 526 statistically significantly higher than 520? Conduct a hypothesis test using the P-value approach. Find the test statistic. 6 = 2.47 (Round to two decimal places as needed.) Find the P-value. The P-value is 0.007. (Round to three decimal places as needed.) Is the sample mean statistically significantly higher? O A. Yes, because the P-value is less than a = 0.10. O B. No, because the P-value is greater than a =0.10. O C. No, because the P-value is less than a = 0.10. O D. Yes, because the P-value is greater than a = 0.10.

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Question 10

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 μ = 520. The teacher obtains a random sample of 2200 students, puts them through the review class, and finds that the mean math score of the 2200 students is 526 with a standard deviation of 114. Complete parts (a) through (d) below.

(a) State the null and alternative hypotheses.

- \( H_0: \mu = 520 \)
- \( H_1: \mu > 520 \)

(b) Test the hypothesis at the \( \alpha = 0.10 \) level of significance. Is a mean math score of 526 statistically significantly higher than 520? Conduct a hypothesis test using the P-value approach.

Find the test statistic.

- \( t_0 = 2.47 \)
  (Round to two decimal places as needed.)

Find the P-value.

- The P-value is \( 0.007 \) 
  (Round to three decimal places as needed.)

Is the sample mean statistically significantly higher?

- A. Yes, because the P-value is less than \( \alpha = 0.10 \).
- B. No, because the P-value is greater than \( \alpha = 0.10 \).
- C. No, because the P-value is less than \( \alpha = 0.10 \).
- D. Yes, because the P-value is greater than \( \alpha = 0.10 \).

Correct Answer: A. Yes, because the P-value is less than \( \alpha = 0.10 \).
Transcribed Image Text: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 μ = 520. The teacher obtains a random sample of 2200 students, puts them through the review class, and finds that the mean math score of the 2200 students is 526 with a standard deviation of 114. Complete parts (a) through (d) below. (a) State the null and alternative hypotheses. - \( H_0: \mu = 520 \) - \( H_1: \mu > 520 \) (b) Test the hypothesis at the \( \alpha = 0.10 \) level of significance. Is a mean math score of 526 statistically significantly higher than 520? Conduct a hypothesis test using the P-value approach. Find the test statistic. - \( t_0 = 2.47 \) (Round to two decimal places as needed.) Find the P-value. - The P-value is \( 0.007 \) (Round to three decimal places as needed.) Is the sample mean statistically significantly higher? - A. Yes, because the P-value is less than \( \alpha = 0.10 \). - B. No, because the P-value is greater than \( \alpha = 0.10 \). - C. No, because the P-value is less than \( \alpha = 0.10 \). - D. Yes, because the P-value is greater than \( \alpha = 0.10 \). Correct Answer: A. Yes, because the P-value is less than \( \alpha = 0.10 \).
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