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A study involving ten people wants to compare the effectiveness of two different brands of antihistamines with regard to enhancing sleep. Each person is randomly assigned to take either Antihistamine A or Antihistamine B on the first night. Then each takes the other antihistamine on the following night. With each person, the hours of sleep were recorded for each night. Explain whether each of the following terms applies to this study.
a. observational study
b. randomized experiment
c. carry-over effect (confounding)
d. matched pairs (dependent samples)
e. explanatory variable (What is it?)
f. response variable (What is it?)
Assume that female students' heights are normally distributed with a mean given by µ = 64.2 in. and a standard deviation given by σ = 2.6 in.
Use confidence interval to determine the estimated margin of error, Then determine the sample mean.
1.females in a certain class rated their intelligence with a mean of 6.5. the males in the same class rated their
1. How does the interpretation of the regression coefficients differ in multiple regression and simple linear regression? Provide examples to support your response.
Lengths had a calculated sample standard deviation of 8 and mean of 9.4. Select the 95% confidence for the true variance of the product lengths. Use the appropriate table in the book.
State the Null Hypothesis and the Alternative Hypothesis
Question 1. The percent confidence interval is the range having the percent probability of containing the actual population parameter.
What is the probability that the first order will come on the fourth sales call of the day? Please show work and round to 4 decimal places.
11.9% reported they were in fair or poor health, including 10.5% of the married people, 19.6% of widows, 16.7% of divorced or separated, 12.5% of those never married, and 14% of those living with an unmarried partner.
Use a calculator or appropriate computer software to verify that, for the preceding data, xbar = 5.1.
Conduct the appropriate analysis to determine if there was an effect of the music on completing problems. Construct the appropriate graph to show the differences in the scores of the two groups.
Cylinder and bucket combined as there are in the box, and twice as many in the box as there are in the bucket, how many balls are there in the cylinder?
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