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. An educator believes the average SAT scores among honors program students across the country exceeds...
A high school is examining the effectiveness of a new SAT prep program. The following scores...
A high school is examining the effectiveness of a new SAT prep program. The following scores are from practice tests taken by students before and after they took the prep program: SAT Score (before) SAT Score (after) 1000 1020 1250 1260 1300 1330 1070 1050 1100 1130 1050 1070 1100 1080 1350 1400 1250 1290 980 1020 Test the null hypothesis that the pre-program and post-program scores are equal (alpha=0.05).
A university is interested in promoting graduates of its honors program by establishing that the mean...
A university is interested in promoting graduates of its honors program by establishing that the mean GPA of these graduates exceeds 3.50. A sample of 36 honors students is taken and is found to have a mean GPA equal to 3.4. The population standard deviation is assumed to equal 0.40. a. Construct the hypotheses H0 and HA b. What is the p-value if a =0.05? c. At the 5% significance level, does the university reject the null hypothesis?
A high school principle currently encourages students to enroll in a specific SAT prep program that...
A high school principle currently encourages students to enroll in a specific SAT prep program that has a reputation of improving score by 50 points on average. A new SAT prep program has been released and claims to be better than their current program. The principle is thinking of advertising this new program to students if there is enough evidence at the 5% level that their claim is true. The principle tests the following hypotheses: Ho = 50 points HA...
A university is interested in promoting graduates of its honors program by establishing that the mean...
A university is interested in promoting graduates of its honors program by establishing that the mean GPA of these graduates exceeds 4.3. A sample of 44 honors students is taken and is found to have a mean GPA equal to 4.4. The population standard deviation is assumed to equal 0.40. The parameter to be tested is O the mean GPA of 4.4 for the 44 selected honors students the mean GPA of all university students the proportion of honors students...
Do students tend to improve their Math SAT scores the second time they take the test?...
Do students tend to improve their Math SAT scores the second time they take the test? We take a random sample of 100 hundred students who took the test twice. The mean score and the standard deviation of these 100 students on the first try are 500 and 90 respectively; the mean score and the standard deviation of these 100 students on the second try are 530 and 92 respectively. We also examine the change in Math SAT score (second...
A high school principle currently encourages students to enroll in a specific SAT prep program that...
A high school principle currently encourages students to enroll in a specific SAT prep program that has a reputation of improving score by 5050 points on average. A new SAT prep program has been released and claims to be better than their current program. The principle is thinking of advertising this new program to students if there is enough evidence at the 5%5% level that their claim is true. The principle tests the following hypotheses: H0:μ=50 points HA:μ>50 pointsH0:μ=50 points...
A company that sells an online course aimed at helping high-school students improve their SAT scores...
A company that sells an online course aimed at helping high-school students improve their SAT scores has claimed that SAT scores will improve by more than 90 points on average if students successfully complete the course. To test this, a national school counseling organization plans to select a random sample of n = 100 students who have previously taken the SAT test. These students will take the company's course and then retake the SAT test. Assuming that the population standard...
The mean SAT score in mathematics, μ, is 551. The standard deviation of these scores is...
The mean SAT score in mathematics, μ, is 551. The standard deviation of these scores is 33, A special preparation course claims that its graduates will score higher, on average, than the mean score 551. A random sample of 43 students completed the course, and their mean SAT score in mathematics was 556 Assume that the population is normally distributed. At the 0.05 level of significance, can we conclude that the preparation course does what it claims? Assume that the...
The mean SAT score in mathematics, u, is 512. The standard deviation of these scores is...
The mean SAT score in mathematics, u, is 512. The standard deviation of these scores is 25. A special preparation course claims that its graduates will score higher, on average, than the mean score 512. A random sample of 25 students completed the course, and their mean SAT score in mathematics was 520. Assume that the population is normally distributed. At the 0.1 level of significance, can we conclude that the preparation course does what it claims? Assume that the...
The mean SAT score in mathematics, H, is 544. The standard deviation of these scores is...
The mean SAT score in mathematics, H, is 544. The standard deviation of these scores is 26. A special preparation course claims that its graduates will score higher, on average, than the mean score 544. A random sample of 50 students completed the course, and their mean SAT score in mathematics was 551. At the 0.1 level of significance, can we conclude that the preparation course does what it claims? Assume that the standard deviation of the scores of course...
A high school principle currently encourages students to enroll in a specific SAT prep program that has a reputation of improving score by 50 points on average. A new SAT prep program has been released and claims to be better than their current program. The principle is thinking of advertising this new program to students if there is enough evidence at the 5% level that their claim is true. The principle tests the following hypotheses: Ho = 50 points HA...
A university is interested in promoting graduates of its honors program by establishing that the mean GPA of these graduates exceeds 4.3. A sample of 44 honors students is taken and is found to have a mean GPA equal to 4.4. The population standard deviation is assumed to equal 0.40. The parameter to be tested is O the mean GPA of 4.4 for the 44 selected honors students the mean GPA of all university students the proportion of honors students...
A company that sells an online course aimed at helping high-school students improve their SAT scores has claimed that SAT scores will improve by more than 90 points on average if students successfully complete the course. To test this, a national school counseling organization plans to select a random sample of n = 100 students who have previously taken the SAT test. These students will take the company's course and then retake the SAT test. Assuming that the population standard...
The mean SAT score in mathematics, μ, is 551. The standard deviation of these scores is 33, A special preparation course claims that its graduates will score higher, on average, than the mean score 551. A random sample of 43 students completed the course, and their mean SAT score in mathematics was 556 Assume that the population is normally distributed. At the 0.05 level of significance, can we conclude that the preparation course does what it claims? Assume that the...
The mean SAT score in mathematics, u, is 512. The standard deviation of these scores is 25. A special preparation course claims that its graduates will score higher, on average, than the mean score 512. A random sample of 25 students completed the course, and their mean SAT score in mathematics was 520. Assume that the population is normally distributed. At the 0.1 level of significance, can we conclude that the preparation course does what it claims? Assume that the...
The mean SAT score in mathematics, H, is 544. The standard deviation of these scores is 26. A special preparation course claims that its graduates will score higher, on average, than the mean score 544. A random sample of 50 students completed the course, and their mean SAT score in mathematics was 551. At the 0.1 level of significance, can we conclude that the preparation course does what it claims? Assume that the standard deviation of the scores of course...
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