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Compute a 95% confidence interval for the population mean, based on the sample 10, 12, 13, 14, 15, 16, and 49. Change the number from 49 to 16 and recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme value on the confidence interval.
By using 0.05 level of significance, is there any evidence of difference in mean life of bulbs produced by two kinds of machines?Calculate p-value and interpret its meaning.
Do 1-sample t-test to see if people in Chicago have travelled to fewer states than people nationwide. Utilize the 10% (.10) level of significance.
Determine the dependent variable(s)? Determine the value of the statistic? Write down the name of one variable not mentioned in this study that one might wish to control for.
Test the claim that the mean age of the prison population in one city is less than 26 years. Sample data are summarized as n = 25, x = 24.4 years, and s = 9.2 years. Use a significance level of α = 0.05.
Use MegaStat's output for multiple regression to determine the multiple regression equation
If a card is drawn at random from a standard 52-card deck, what is the probability that the card drawn is one of the following?
Collapse the response categories in the following tables so that it meets the assumptions of the chi-square test; than perform the test.
The following table shows the hardness (in Brinell hardness numbers) and the tensile strength (in thousands of pounds per square inch) of ten specimens of a certain alloy.
The 95% prediction interval for a new patient with a 2-day cholesterol level of 220 is
If we select one box of cereal at random from this population, what is the probability that it will weigh less than 915 grams?
Suppose among 312 large city residents sampled, 65 refused to cooperate. What is the margin of error at the 95% confidence level.
Determine the probability of exactly one success given Poisson distribution with mean of 2.0.
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