Homework Answers
The statistical software output for this problem is :
P-value = 0.2380
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Question 14 (0.75 points) Suppose that the mean price of a home in Denver, Colorado in...
Question 14 (0.75 points) Suppose that the mean price of a home in Denver, Colorado in 2008 was 225.3 thousand doll...
Question 14 (0.75 points) Suppose that the mean price of a home in Denver, Colorado in 2008 was 225.3 thousand dollars. A random sample of 49 homes sold in 2010 had a mean price of 200.9 thousand dollars. A real estate firm wants to test to see if the mean price in 2010 differs from the from mean price in 2008. Assume that the population standard deviation is 140. Perform the hypothesis test and compute the P-value. Write down your...
Question 15 (0.75 points) Recall the previous question where the real estate firm wants to see...
Question 15 (0.75 points) Recall the previous question where the real estate firm wants to see if the mean price of homes in 2010 have differed from the mean price in 2008. Based on your P-value, what is the conclusion if we test at the 0.05 level of significance? There is evidence to conclude that the mean price of homes in 2010 differ from the mean price in 2008. There is evidence to conclude that the mean price of homes...
Question 10 (0.75 points) A study showed that in a certain month, the mean time spent...
Question 10 (0.75 points) A study showed that in a certain month, the mean time spent per visit to Facebook was 19.5 minutes. Assume the standard deviation of the population is 8 minutes. Suppose that a simple random sample of 100 visits in that month has a sample mean of 21.13 minutes. A social scientist is interested in knowing whether the mean time of Facebook visits has increased. Perform the hypothesis test and compute the P-value. Write down your P-value....
House prices: Data from the National Association of Realtors indicates that the mean price of a...
House prices: Data from the National Association of Realtors indicates that the mean price of a home in Denver, Colorado, in 2012 was 260.7 thousand dollars. A random sample of 60 homes sold in 2013 had a mean price of 293 thousand dollars. Can you conclude that the mean price in 2013 is greater than the mean price in 2012? Assume the population standard deviation is o=155. Use the a = 0.10 level of significance and the critical value method....
Question 12 (0.75 points) A random sample of 64 second-graders in a certain school district are...
Question 12 (0.75 points) A random sample of 64 second-graders in a certain school district are given a standardized mathematics skills test. The sample mean score is 51.81 . Assume the standard deviation for the population of test scores is 15. The nationwide average score on this test is 50. The school superintendent wants to know whether the second-graders in her school district have greater math skills than the nationwide average. Perform the hypothesis test and compute the P-value. Write...
these two questions go together Question 10 (0.75 points) A study showed that in a certain...
these two questions go together
Question 10 (0.75 points) A study showed that in a certain month, the mean time spent per visit to Facebook! was 19.5 minutes. Assume the standard deviation of the population is 8 minutes. Suppose that a simple random sample of 100 visits in that month has a sample mean of 21.70 minutes. A social scientist is interested in knowing whether the mean time of Facebook visits has increased. Perform the hypothesis test and compute the...
Question 12 (0.75 points) A random sample of 64 seccond-graders in a certain school district are...
Question 12 (0.75 points) A random sample of 64 seccond-graders in a certain school district are given a standardized mathematics skills test. The sample mean score is 51.03. Assume the standard deviation for the population of test scores is 15. The nationwide average score on this test is 50. The school superintendent wants to know whether the second-graders in her school district have greater math skills than the nationwide average. Perform the hypothesis test and compute the P-value. Write down...
this is part two of it Question 12 (0.75 points) A random sample of 64 second-graders...
this is part two of it
Question 12 (0.75 points) A random sample of 64 second-graders in a certain school district are given a standardized mathematics skills test. The sample mean score is 51.05. Assume the standard deviation for the population of test scores is 15. The nationwide average score on this test is 50. The school superintendent wants to know whether the second-graders in her school district have greater math skills than the nationwide average. Perform the hypothesis test...
Question 13 (0.75 points) Saved Recall the previous question where the school superintendent wanted to know w...
Question 13 (0.75 points) Saved Recall the previous question where the school superintendent wanted to know whether second-graders in her school district have greater math skills than the nationwide average. Based on your P-value, what is the conclusion if we test at the 0.05 level of significance? There is evidence to conclude that the second-graders in her district do not have greater math skills. There is evidence to conclude that the second-graders in her district have greater math skills. This...
Consider the following hypotheses: Ho: mean= 92 Hi: mean - 92 A test is performed with a sample of size 576. The sa...
Consider the following hypotheses: Ho: mean= 92 Hi: mean - 92 A test is performed with a sample of size 576. The sample mean was 85.11 and the population standard deviation is 72. Assume that the population is approximately normal. Use the TI-84 PLUS calculator to compute the P-value. Round your answer to four decimal places (for example: 0.0138). Write only a number as your answer. Your Answer: Answer Question 10 (0.75 points) A study showed that in a certain...
Question 14 (0.75 points) Suppose that the mean price of a home in Denver, Colorado in 2008 was 225.3 thousand dollars. A random sample of 49 homes sold in 2010 had a mean price of 200.9 thousand dollars. A real estate firm wants to test to see if the mean price in 2010 differs from the from mean price in 2008. Assume that the population standard deviation is 140. Perform the hypothesis test and compute the P-value. Write down your...
Question 15 (0.75 points) Recall the previous question where the real estate firm wants to see if the mean price of homes in 2010 have differed from the mean price in 2008. Based on your P-value, what is the conclusion if we test at the 0.05 level of significance? There is evidence to conclude that the mean price of homes in 2010 differ from the mean price in 2008. There is evidence to conclude that the mean price of homes...
Question 10 (0.75 points) A study showed that in a certain month, the mean time spent per visit to Facebook was 19.5 minutes. Assume the standard deviation of the population is 8 minutes. Suppose that a simple random sample of 100 visits in that month has a sample mean of 21.13 minutes. A social scientist is interested in knowing whether the mean time of Facebook visits has increased. Perform the hypothesis test and compute the P-value. Write down your P-value....
House prices: Data from the National Association of Realtors indicates that the mean price of a home in Denver, Colorado, in 2012 was 260.7 thousand dollars. A random sample of 60 homes sold in 2013 had a mean price of 293 thousand dollars. Can you conclude that the mean price in 2013 is greater than the mean price in 2012? Assume the population standard deviation is o=155. Use the a = 0.10 level of significance and the critical value method....
Question 12 (0.75 points) A random sample of 64 second-graders in a certain school district are given a standardized mathematics skills test. The sample mean score is 51.81 . Assume the standard deviation for the population of test scores is 15. The nationwide average score on this test is 50. The school superintendent wants to know whether the second-graders in her school district have greater math skills than the nationwide average. Perform the hypothesis test and compute the P-value. Write...
these two questions go together
Question 10 (0.75 points) A study showed that in a certain month, the mean time spent per visit to Facebook! was 19.5 minutes. Assume the standard deviation of the population is 8 minutes. Suppose that a simple random sample of 100 visits in that month has a sample mean of 21.70 minutes. A social scientist is interested in knowing whether the mean time of Facebook visits has increased. Perform the hypothesis test and compute the...
Question 12 (0.75 points) A random sample of 64 seccond-graders in a certain school district are given a standardized mathematics skills test. The sample mean score is 51.03. Assume the standard deviation for the population of test scores is 15. The nationwide average score on this test is 50. The school superintendent wants to know whether the second-graders in her school district have greater math skills than the nationwide average. Perform the hypothesis test and compute the P-value. Write down...
this is part two of it
Question 12 (0.75 points) A random sample of 64 second-graders in a certain school district are given a standardized mathematics skills test. The sample mean score is 51.05. Assume the standard deviation for the population of test scores is 15. The nationwide average score on this test is 50. The school superintendent wants to know whether the second-graders in her school district have greater math skills than the nationwide average. Perform the hypothesis test...
Question 13 (0.75 points) Saved Recall the previous question where the school superintendent wanted to know whether second-graders in her school district have greater math skills than the nationwide average. Based on your P-value, what is the conclusion if we test at the 0.05 level of significance? There is evidence to conclude that the second-graders in her district do not have greater math skills. There is evidence to conclude that the second-graders in her district have greater math skills. This...
Consider the following hypotheses: Ho: mean= 92 Hi: mean - 92 A test is performed with a sample of size 576. The sample mean was 85.11 and the population standard deviation is 72. Assume that the population is approximately normal. Use the TI-84 PLUS calculator to compute the P-value. Round your answer to four decimal places (for example: 0.0138). Write only a number as your answer. Your Answer: Answer Question 10 (0.75 points) A study showed that in a certain...
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