A college entrance exam company determined that a score of 20 on the mathematics portion of the exam suggests that a student is ready for college-level mathematics. To achieve this goal, the company recommends that students take a core curriculum of math courses in high school. Suppose a random sample of 250 students who completed this core set of courses results in a mean math score of 20.4 on the college entrance exam with a standard deviation 3.3. Do these results suggest that students who complete the core curriculum are ready for college-level mathematics? That is, are they scoring above 20 on the mathematics portion of the exam? Complete parts through d) below. a) State the appropriate null and alternative hypotheses. Fill in the correct answers below. The appropriate null and alternative hypotheses are Ho: b) Verify that the requirements to perform the test using the t-distribution are satisfied. Check all that apply. versus H₂: ▼ ▼. A. The students were randomly sampled. B. The sample size is larger than 30. C. The sample data come from a population that is approximately normal. D. The students' test scores were independent of one another. E. A boxplot of the sample data shows no outliers. F. None of the requirements are satisfied. c) Use the P-value approach at the a=0.05 level of significance to test the hypotheses in part (a). Identify the test statistic. to = (Round to two decimal places as needed.) Identify the P-value. P-value = (Round to three decimal places as needed.) d) Write a conclusion based on the results. Choose the correct answer below. ▼the null hypothesis and claim that there sufficient evidence to conclude that the population mean is than 20.
A college entrance exam company determined that a score of 20 on the mathematics portion of the exam suggests that a student is ready for college-level mathematics. To achieve this goal, the company recommends that students take a core curriculum of math courses in high school. Suppose a random sample of 250 students who completed this core set of courses results in a mean math score of 20.4 on the college entrance exam with a standard deviation 3.3. Do these results suggest that students who complete the core curriculum are ready for college-level mathematics? That is, are they scoring above 20 on the mathematics portion of the exam? Complete parts through d) below. a) State the appropriate null and alternative hypotheses. Fill in the correct answers below. The appropriate null and alternative hypotheses are Ho: b) Verify that the requirements to perform the test using the t-distribution are satisfied. Check all that apply. versus H₂: ▼ ▼. A. The students were randomly sampled. B. The sample size is larger than 30. C. The sample data come from a population that is approximately normal. D. The students' test scores were independent of one another. E. A boxplot of the sample data shows no outliers. F. None of the requirements are satisfied. c) Use the P-value approach at the a=0.05 level of significance to test the hypotheses in part (a). Identify the test statistic. to = (Round to two decimal places as needed.) Identify the P-value. P-value = (Round to three decimal places as needed.) d) Write a conclusion based on the results. Choose the correct answer below. ▼the null hypothesis and claim that there sufficient evidence to conclude that the population mean is than 20.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A college entrance exam company determined that a score of 20 on the mathematics portion of the exam suggests that a student is ready for college-level mathematics. To achieve this goal, the company recommends that students
take a core curriculum of math courses in high school. Suppose a random sample of 250 students who completed this core set of courses results in a mean math score of 20.4 on the college entrance exam with a standard deviation c
3.3. Do these results suggest that students who complete the core curriculum are ready for college-level mathematics? That is, are they scoring above 20 on the mathematics portion of the exam? Complete parts a) through d) below.
a) State the appropriate null and alternative hypotheses. Fill in the correct answers below.
The appropriate null and alternative hypotheses are Hō:
versus H₁:
b) Verify that the requirements to perform the test using the t-distribution are satisfied. Check all that apply.
c) Use the P-value approach at the x = 0.05 level of significance to test the hypotheses in part (a).
Identify the test statistic.
(Round to two decimal places as needed.)
to
A. The students were randomly sampled.
B. The sample size is larger than 30.
C. The sample data come from a population that is approximately normal.
D. The students' test scores were independent of one another.
E. A boxplot of the sample data shows no outliers.
F. None of the requirements are satisfied.
=
Identify the P-value.
(Round to three decimal places as needed.)
d) Write a conclusion based on the results. Choose the correct answer below.
the null hypothesis and claim that there
P-value =
sufficient evidence to conclude that the population mean is
than 20.
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