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4 pts Question 9 9. In a test of hypotheses H :u=...
Question 9 2.5 pts Consider the following hypothesis test: H: H: 25 > 25 A sample...
Question 9 2.5 pts Consider the following hypothesis test: H: H: 25 > 25 A sample of 40 provided a sample mean of 26.4. The population standard deviation is 4. What is the value of the test statistic for this test? 2.21 1.96 0.350 1.645 Question 13 2.5 pts Consider a hypothesis test to see if the average student scores in exam 2 is less than their score for exam 1. We calculate our test statistic on the z-table to...
In a test of hypotheses Ho: M = 456 versus H1:4< 456, the rejection region is...
In a test of hypotheses Ho: M = 456 versus H1:4< 456, the rejection region is the interval (-00, -1.796], the value of the sample mean computed from a sample of size 12 is x = 453, and the value of the test statistic is t = -2.598. The correct decision and justification are: O Reject Ho because 453 is less than 456 O Reject Ho because -2.598 lies in the rejection region O Do not reject Ho because -2.598...
Question 4 0/3 pts 5399 Detail: You wish to test the following claim (H) at a...
Question 4 0/3 pts 5399 Detail: You wish to test the following claim (H) at a significance level of a = 0.005. H: = 52.2 H: < 52.2 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n = 57 with mean M = 50.3 and a standard deviation of SD = 17.7. What is the test statistic for this sample? (Report answer accurate to three decimal places.)...
Question 2 > 0/3 pts 399 Details You wish to test the following claim (H) at...
Question 2 > 0/3 pts 399 Details You wish to test the following claim (H) at a significance level of a = 0.001. H.: = 84.9 H: > 84.9 You believe the population is normally distributed and you know the standard deviation is o = 10.4 You obtain a sample mean of M = 85.5 for a sample of size n = 74. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic...
Question 5 0/3 pts 5399 Details You wish to test the following claim (H) at a...
Question 5 0/3 pts 5399 Details You wish to test the following claim (H) at a significance level of a = 0.02. Hu = 50.7 H: #50.7 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n = 410 with mean M = 46.7 and a standard deviation of SD = 20.7. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test...
Question 3 0/3 pts 399 Details You wish to test the following claim (H) at a...
Question 3 0/3 pts 399 Details You wish to test the following claim (H) at a significance level of a 0.002 H: = 55.3 H: 55.3 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n = 28 with mean M = 56.9 and a standard deviation of SD = 7.5. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic...
help thank you :) Question 5 4 pts 5. In a test of hypotheses Ho :...
help thank you :)
Question 5 4 pts 5. In a test of hypotheses Ho : u = 578 vs. He : u # 578 at the 101 level of the significance a sample of size 42 produced 7 = 573 and test statistic 2 = -1.311 . the p-value (the observed significance) of the test is about 0.200 0.100 0.190 -0.095 0.095 Question 6 4 pts 1. In a test of hypotheses H : p= 0.42 vs. Hq :p...
Question 6 2.5 pts A statistics professor believes that his students are above average intelligence. To...
Question 6 2.5 pts A statistics professor believes that his students are above average intelligence. To test this, he collects a random sample of 50 of his students' IQ scores and finds a sample mean of 110. Knowing that the mean population IQ is 100 with a standard deviation of 15, he calculates a z of x-bar test statistic of 4.72. Based on this information, what statistical decision should this professor come to? O Fail to reject the null, because...
Question 18 1 pts The Medical School Admission Test (MCAT) is a nationwide exam used to...
Question 18 1 pts The Medical School Admission Test (MCAT) is a nationwide exam used to measure college students' readiness for medial school. Nationally, the mean score for all applicants is 30, and the standard deviation is 2.5. A certain university claims that their school's applicants have an average higher than 30. To test the claim, a random sample of 50 medical school applicants from the university is selected, with a mean MCAT score of 31. At a.05 significance level,...
You wish to test the following claim ( H a H a ) at a significance...
You wish to test the following claim ( H a H a ) at a significance level of α = 0.02 α = 0.02 H o : μ = 74.5 H a : μ ≠ 74.5 You believe the population is normally distributed and you know the standard deviation is σ = 14.8. You obtain a sample mean of M = 67.5 for a sample of size n = 26 What is the critical value for this test? (Report answer...
Question 9 2.5 pts Consider the following hypothesis test: H: H: 25 > 25 A sample of 40 provided a sample mean of 26.4. The population standard deviation is 4. What is the value of the test statistic for this test? 2.21 1.96 0.350 1.645 Question 13 2.5 pts Consider a hypothesis test to see if the average student scores in exam 2 is less than their score for exam 1. We calculate our test statistic on the z-table to...
In a test of hypotheses Ho: M = 456 versus H1:4< 456, the rejection region is the interval (-00, -1.796], the value of the sample mean computed from a sample of size 12 is x = 453, and the value of the test statistic is t = -2.598. The correct decision and justification are: O Reject Ho because 453 is less than 456 O Reject Ho because -2.598 lies in the rejection region O Do not reject Ho because -2.598...
Question 4 0/3 pts 5399 Detail: You wish to test the following claim (H) at a significance level of a = 0.005. H: = 52.2 H: < 52.2 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n = 57 with mean M = 50.3 and a standard deviation of SD = 17.7. What is the test statistic for this sample? (Report answer accurate to three decimal places.)...
Question 2 > 0/3 pts 399 Details You wish to test the following claim (H) at a significance level of a = 0.001. H.: = 84.9 H: > 84.9 You believe the population is normally distributed and you know the standard deviation is o = 10.4 You obtain a sample mean of M = 85.5 for a sample of size n = 74. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic...
Question 5 0/3 pts 5399 Details You wish to test the following claim (H) at a significance level of a = 0.02. Hu = 50.7 H: #50.7 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n = 410 with mean M = 46.7 and a standard deviation of SD = 20.7. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test...
Question 3 0/3 pts 399 Details You wish to test the following claim (H) at a significance level of a 0.002 H: = 55.3 H: 55.3 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n = 28 with mean M = 56.9 and a standard deviation of SD = 7.5. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic...
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Question 5 4 pts 5. In a test of hypotheses Ho : u = 578 vs. He : u # 578 at the 101 level of the significance a sample of size 42 produced 7 = 573 and test statistic 2 = -1.311 . the p-value (the observed significance) of the test is about 0.200 0.100 0.190 -0.095 0.095 Question 6 4 pts 1. In a test of hypotheses H : p= 0.42 vs. Hq :p...
Question 6 2.5 pts A statistics professor believes that his students are above average intelligence. To test this, he collects a random sample of 50 of his students' IQ scores and finds a sample mean of 110. Knowing that the mean population IQ is 100 with a standard deviation of 15, he calculates a z of x-bar test statistic of 4.72. Based on this information, what statistical decision should this professor come to? O Fail to reject the null, because...
Question 18 1 pts The Medical School Admission Test (MCAT) is a nationwide exam used to measure college students' readiness for medial school. Nationally, the mean score for all applicants is 30, and the standard deviation is 2.5. A certain university claims that their school's applicants have an average higher than 30. To test the claim, a random sample of 50 medical school applicants from the university is selected, with a mean MCAT score of 31. At a.05 significance level,...
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