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An interviewer is asked to obtain answers to a survey on shopping habits from 50 people, 25 of each gender. She positions herself outside a major shop in the town centre at 9 a.m. on a Monday morning and starts interviewing people one by one. Discuss this approach in class. Can you identify some of the problems this study raises?
Raccoons are identified by gender and then weighed from three different neighborhoods. Using a 0.05 significance level what can you conclude from the following Two-Way ANOVA results?
With a mean of 805 pairs of jeans and a standard deviation of 207 pairs. What is the probability that the company will make a profit each month?
Christianity teaches that God exists in three persons:
How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 5 percentage points with 92% confidence?
Explain the difference between a discrete and a continuous random variable. Give two examples of each type of random variable.
If the variability of the filling machine is reduced to 0.025 ounce, verify that this will lower the required average amount of coffee to 4.050 ounces and yet keep 98 percent of the jars above 4 ounces.
The 50 computer mice inspectors at a particular factory can only inspect 34 mice per hour. Does the company have reason to believe that these inspectors are slower than average at α = 0.10?
in a recent year the federal communications commission reported that the mean wait for repairs for verizon customers
Mr. Smith had 11 stocks that averaged 11.3 percent with a standard deviation of 3.2 percent. At the .02 level of significance, can we conclude that Mr. Jones' stocks have a different variation?
use the mann-whitney table to find the critical values. for a left -tailed or two-tailed test you will alsoneed the
these data are observations collected using the completely randomized designnbspnbspsample 1nbspnbspnbspnbspsample
A standard deviation of five minuts. Assuming the call times are normally distributed, what percentage of calls are longer than 35 minutes.
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