Suppose that the null hypothesis of an experiment is and the alternative is . Running the...
Suppose that the null hypothesis of an experiment is 
and the alternative is 
. Running the experiment gives the test mean 
and with a standard error 
that was estimated from the sample. Under what circumstances would
you reject the null hypothesis?
Select one:
a. 
lies within the 95% percent confidence interval around 
, based on the normal distribution and 
.
b. 
does not lie within the 95% percent confidence interval around
, based on the t-distribution and with 
degrees of freedom and 
.
c. 
lies within the 95% percent confidence interval around 
, based on the normal distribution and 
.
d. 
does not lie within the 95% percent confidence interval around
, based on the t-distribution and with 
degrees of freedom and 
.
Homework Answers
Add Answer to:
Suppose that the null hypothesis of an experiment is
and the alternative is
. Running the...
Suppose that the null hypothesis of an experiment is and the alternative is . Running the...
Suppose that the null hypothesis of an experiment is and the alternative is . Running the experiment gives the test mean and with a standard error that was estimated from the sample. Under what circumstances would you reject the null hypothesis?
30. Let us consider you have given your data to a computer to analyze, and it...
30. Let us consider you have given your data to a computer to analyze, and it tells you the p-value = 0.0004. If your significance level (alpha) is 0.05, then you would a. fail to reject the null hypothesis b. reject the alternative hypothesis C. reject the null hypothesis d. consider the computer has given you an incorrect value 31. With small degrees of freedom, the t-distribution is not quite Normal, but with degrees of freedom the t-distribution will more...
Suppose you test null hypothesis Ho : μι_Ha versus Ha : μ.μ2 , software gives 12.3 degrees of fre...
suppose you test null hypothesis Ho : μι_Ha versus Ha : μ.μ2 , software gives 12.3 degrees of freedom for your t test. Answer the following questions: a) If test statistics t-2.25 5, use the rejection region to decide if Ho be rejected or not at a .0.05? Include a sketch, clearly label critical value(s) and rejection and nonrejection regions. b) If test statistics was t-1.14, use a 0.05, compute the p-value and decide if Ho b rejected or not...
Intro to Statistics: Q1: Q2: Q3: [8-1] Suppose we are testing the null hypothesis Ho: u...
Intro to Statistics:
Q1:
Q2:
Q3:
[8-1] Suppose we are testing the null hypothesis Ho: u = 50 and the alternative Ha: u 50 for a normal population with o 6. We took an SRS sample of size 48 and obtained x-bar 53. The P-value for the test is: 0.05 <0.05 Question 2 (0.5 points) 8-2] When performing a one-sample t-test, if the sample size is 14, then of freedom should be used for determining the confidence interval from the...
Identify the null hypothesis. alternative hypothesis, test statistic, decision about the null hypothesis and final conclusion...
Identify the null hypothesis. alternative hypothesis, test statistic, decision about the null hypothesis and final conclusion that addresses the original claim Various temperature measurements are recorded at different times for a particular city. The mean of 20 degrees is obtained for 60 temperatures on 60 different days. Assuming that the population standard deviation is 1.5 degrees, test the claim that the population mean is 22 degrees. Use a 0.05 significance level Hou = 22; H1 is u# 22 Test statistic:...
8. Hypothesis testing, problem 4 Aa Aa Microsoft Outlook is believed to be the most widely...
8. Hypothesis testing, problem 4 Aa Aa Microsoft Outlook is believed to be the most widely used e-mail manager. A Microsoft executive claims that Outlook is used by at least 75% of Internet users. A Merrill Lynch study involving 200 respondents reported that 68% use Microsoft Outlook. Can you prove that the executive's claim is not valid? What is the relevant point estimate? What is the value of the test statistic? This test statistic has: O A t distribution with...
You are testing the null hypothesis µ=150 versus the two tailed alternative. You reject the null...
You are testing the null hypothesis µ=150 versus the two tailed alternative. You reject the null hypothesis in favor of the alternative hypothesis. If in reality, µ does equal 150, you have made a : A. Correct Decision B. Type II Error C. Type I Error
You are conducting a t-test to assess the null hypothesis H0: μ = 50 against the...
You are conducting a t-test to assess the null hypothesis H0: μ = 50 against the two-sided alternative. You collect a random sample of n=25 observations. The sample has a mean of 55 and a standard deviation of 10. How many degrees of freedom does the test have? Assume the underlying distribution is normal.
Part a) Compute the regression line for these data, and provide your estimates of the slope...
Part a)
Compute the regression line for these data, and provide your
estimates of the slope and intercept parameters. Please round
intermediate results to 6 decimal places.
Slope:
Intercept:
Note: For sub-parts below, use the slope and intercept
values in Part a, corrected to 3 decimal places to calculate
answers by hand using a scientific calculator.
Part b)
Based on the regression model, what level of horsepower would you
expect the engine to produce if running at 24002400 rpm?
Answer:...
6. A two-tailed hypothesis test for a repeated-measures research design Previous studies have shown that playing...
6. A two-tailed hypothesis test for a repeated-measures research design Previous studies have shown that playing video games can increase visual perception abilities on tasks presented in the gaming zone of the screen (within 5 degrees of the center). A graduate student is interested in whether playing video games increases peripheral visual perception abilities or decreases attention to peripheral regions because of focus on the gaming zone. For his study, he selects a random sample of 81 adults. The subjects...
30. Let us consider you have given your data to a computer to analyze, and it tells you the p-value = 0.0004. If your significance level (alpha) is 0.05, then you would a. fail to reject the null hypothesis b. reject the alternative hypothesis C. reject the null hypothesis d. consider the computer has given you an incorrect value 31. With small degrees of freedom, the t-distribution is not quite Normal, but with degrees of freedom the t-distribution will more...
suppose you test null hypothesis Ho : μι_Ha versus Ha : μ.μ2 , software gives 12.3 degrees of freedom for your t test. Answer the following questions: a) If test statistics t-2.25 5, use the rejection region to decide if Ho be rejected or not at a .0.05? Include a sketch, clearly label critical value(s) and rejection and nonrejection regions. b) If test statistics was t-1.14, use a 0.05, compute the p-value and decide if Ho b rejected or not...
Intro to Statistics:
Q1:
Q2:
Q3:
[8-1] Suppose we are testing the null hypothesis Ho: u = 50 and the alternative Ha: u 50 for a normal population with o 6. We took an SRS sample of size 48 and obtained x-bar 53. The P-value for the test is: 0.05 <0.05 Question 2 (0.5 points) 8-2] When performing a one-sample t-test, if the sample size is 14, then of freedom should be used for determining the confidence interval from the...
Identify the null hypothesis. alternative hypothesis, test statistic, decision about the null hypothesis and final conclusion that addresses the original claim Various temperature measurements are recorded at different times for a particular city. The mean of 20 degrees is obtained for 60 temperatures on 60 different days. Assuming that the population standard deviation is 1.5 degrees, test the claim that the population mean is 22 degrees. Use a 0.05 significance level Hou = 22; H1 is u# 22 Test statistic:...
8. Hypothesis testing, problem 4 Aa Aa Microsoft Outlook is believed to be the most widely used e-mail manager. A Microsoft executive claims that Outlook is used by at least 75% of Internet users. A Merrill Lynch study involving 200 respondents reported that 68% use Microsoft Outlook. Can you prove that the executive's claim is not valid? What is the relevant point estimate? What is the value of the test statistic? This test statistic has: O A t distribution with...
Part a)
Compute the regression line for these data, and provide your
estimates of the slope and intercept parameters. Please round
intermediate results to 6 decimal places.
Slope:
Intercept:
Note: For sub-parts below, use the slope and intercept
values in Part a, corrected to 3 decimal places to calculate
answers by hand using a scientific calculator.
Part b)
Based on the regression model, what level of horsepower would you
expect the engine to produce if running at 24002400 rpm?
Answer:...
6. A two-tailed hypothesis test for a repeated-measures research design Previous studies have shown that playing video games can increase visual perception abilities on tasks presented in the gaming zone of the screen (within 5 degrees of the center). A graduate student is interested in whether playing video games increases peripheral visual perception abilities or decreases attention to peripheral regions because of focus on the gaming zone. For his study, he selects a random sample of 81 adults. The subjects...
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