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The average price of the sample of 12 bottles of diet salad dressing taken from different stores is $1.43. Standard deviation is $0.09. Average price of the sample of 16 low-calorie frozen desserts is $1.03. Standard deviation is $0.10. At α = 0.01, is there significant difference in price? Determine the 99% confidence interval of the difference in the means.
Let z represent the standard normal variable and suppose a value is randomly selected. Find each of the following probabilities by:
Calculate and interpret standard error of estimate se and coefficient of determination R2 for these data.
Draw a tree diagram representing the data. What is the probability that a vehicle stolen in this city will never be recovered?
The Minitab output for the Tukey Least Significant Difference multiple comparisons is below. Which means are different and similar
A researcher plans to compare two treatment conditions by measuring one sample in treatment 1 and a second sample in treatment 2. The researcher will then compare the scores for the two treatments. If there is a difference between the two groups o..
The U.S. Food and Drug Administration (FDA) performed a study that compared the carbohydrate content (as a percentage of weight) of several major brands of corn and potato chips.
The National Center for Education Statistics reported that 47% of college students work to pay for tuition and living expenses. Assume that a sample of 450 college students was used in the study.
Regression - What factors predict duration of dyspnea in elders with heart failure?
The scores of students taking the Scholastic Aptitude Test (SAT) are normally distributed with a mean u = 1035 and a standard deviation o = 131.
Base on a survey of over 10,000 households, the number of televisions in the home was recorded as given in the table below. Based on the data, find the expected number of televisions in a home.
Test the hypothesis that the average price is higher than $1.87. Use level of significance α = 0.05.
At the .05 level of significance, is there evidence of a difference in variability in the shipping time between the two outlets? What decision should the carpet manufacturer make?
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