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A newspaper article claims that the average age for people who receive food stamps is 40 years. You believe that the average age is less than that. You take a random sample of 100 people who receive food stamps, and find their average age to be 39.2 years. You find that the calculated test statistic falls within the rejection zone (assuming α = .05). What would be an appropriate interpretation of this result?
The statistically significant result indicates that the average age of people who receive food stamps is younger than 40.
The evidence is not strong enough to support the claim that the average age of people who receive food stamps is younger than 40.
An error must have been made. This difference is too small to be statistically significant.
a scientist testifying before a congressional hearing on the effects of estrogenic pesticides told every man in the
Anomaly-based intrusion detection systems generate alerts based on deviations from "normal" traffic.
Test the null hypothesis that the coefficients of the three high school grade summaries are zero; that is, test H0: βHSM = βHSS = βHSE = 0.
Calculate seasonally adjusted monthly sales by the ratio to trend method for the last six months of 1992
Is there any evidence to suggest that the difference between the 180-pound riders' mean tire pressure and the 150-pound riders' mean tire pressure is greater.
a) Use the method of moments to estimate the two parameters of the beta distribution. b) Use a quantile-quantile plot to assess the goodness of fit.
In 1991, a Gallup Poll reported this percent to be 79%. Using the data from this poll, test the claim that the percent of drivers who enjoy driving their cars has declined since 1991. Report the large-sample z statistic and its P-value.
What are the mean and standard deviation of the number of heads?- Suppose the resulting number of heads is unusual, two standard deviations above the mean. How many extra heads were observed?
the sampling distribution of the sample mean. use the central limit theorem to find the approximate probability that the mean number of flaws exceeds 1.8 per square yard.
An insurance company estimates that the probability that an individual in a particular risk group will survive one year is 0.99. Such a person wishes to buy.
The marketing team of a major electronics retailer is interested in running a promotion in the Westchester, NY area. This program provides incentives.
a researcher reports an f-ratio with df 3 36 from an independent-measures research study.a. how many treatment
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