Homework Answers
part 3)
p value = 2*P(Z>3.04) = 0.0023 [ Excel formula =2*NORMSDIST(-z) ]
Decision: p-value<α, Reject null hypothesis
we have sufficient evidence to Reject H0
it does not support claim
Add Answer to:
1)
what is the p value?
2) do we have sufficent evidence to support H0?
3)...
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please explain how to find p-value
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For problems 7-9 below you have to apply p value method. Use on Statkey Normal or distribution to find the p value 7. Test the claim that the population of sophomore college students has a mean grade point average greater than 2.25. Sample statistics include na 160 students, sample mean is 2.35, and population standard deviation is equal 0.60 Use a= 0.02 level of significance. a) What is the null hypothesis? b) What is an alternate hypothesis? c) Is this...
we have to calculate on TI-84. I input both lists then go to 2 samp TTest...
we have to calculate on TI-84. I input both lists then go to 2
samp TTest and when i enter the data i keep getting a huge exponent
for the p value and keep getting every question wrong pls
help.
Baby weights: Following are weights in pounds for random samples of 17 newborn baby boys and baby girls born in Denver in 2011. Box plots indicate that the samples come from populations that are approximately normal. Let H, denote the...
Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.8 minutes. Assume the standard deviation is o= 8.0 minutes. Suppose that a simple random sample of 107 visits was selected this year and has a sample mean of x = 18.8 minutes. A social scientist is interested to know whether the mean time of Facebook visits has decreased. Use the a=0.10 level of significance and the P-value method with the TI-84 calculator....
ole Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.2 minutes. Assume the standard deviation is o = 40 minutes. Suppose that a simple random sample of 107 visits was selected this year and has a sample mean of x = 19.2 minutes. A social scientist is interested to know whether the mean time of Facebook visits has decreased. Use the a=0.10 level of significance and the P-value method with the...
Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 19.8 minutes. Assume the standard deviation is o=10.0 minutes. Suppose that a simple random sample of 101 visits was selected this year and has a sample mean of x = 22.8 minutes. A social scientist is interested to know whether the mean time of Facebook visits has increased. Use the a=0.10 level of significance and the critical value method with the table. Part:...
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 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....
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please explain how to find p-value
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Question 12 of 14 (1 point) Attempt 1 of Unlimited View question in a popup 8.2 Section Exercise 52 (p-value Are you smarter than a second-grader? A random sample of 51 second-graders in a certain school district are given a standardized mathematics skills test. The sample mean score is x = 44. Assume the standard deviation of test scores is o=15. The nationwide average score on this test is 50. The school superintendent wants to know whether the second-graders in...
For problems 7-9 below you have to apply p value method. Use on Statkey Normal or distribution to find the p value 7. Test the claim that the population of sophomore college students has a mean grade point average greater than 2.25. Sample statistics include na 160 students, sample mean is 2.35, and population standard deviation is equal 0.60 Use a= 0.02 level of significance. a) What is the null hypothesis? b) What is an alternate hypothesis? c) Is this...
we have to calculate on TI-84. I input both lists then go to 2
samp TTest and when i enter the data i keep getting a huge exponent
for the p value and keep getting every question wrong pls
help.
Baby weights: Following are weights in pounds for random samples of 17 newborn baby boys and baby girls born in Denver in 2011. Box plots indicate that the samples come from populations that are approximately normal. Let H, denote the...
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