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Tires a and tires b have an average lifespan of 50,000 miles. Tires A was found to have a standard deviation of 12,000 miles and tires b was found to have a standard deviation of 8,000 miles. Which tires are more reliable?
stores s1 s2 and s3 of the same company have respectively 50 70 and 100 employees of which 50 60 and 75 are women. a
the time in minutes between telephone calls at an insurance claims office has the expo- nential probability
Suppose that a survey is being planned for purposes of estimating the average number of hours spent exercising daily by adults (18 years of age or older) living in a certain community.
This test result prompts a state administrator to declare that the mean score for the sate's eighth graders on the examination is more than 275. at a=.04, is there enough evidence to support the claim.
A social psychologist is studying college students attitudes toward drinking and driving. He is specifically interested in attitude change as a result of years in college and of viewing the consequences of drinking and driving accidents.
In a council election, 5 people are running, 3 seats available, and you want two for sure to win,but no caring who the third is. Should you only vote for the two candidates that you want and leave the third ballot blank or should you vote for the two..
1. a quiz has 5 multiple-choice questions where each question has 4 possible answers but only 1 is the correct
a large corporation knows that the proportion of their employees that have children is 0.67. the director of human
The study found that men who had participated in some vigorous activity at least twice a week in high school, college, and up to age 40 had a 60% reduced risk of Parkinson's disease developing. The study found no such reduction for women. What typ..
Test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-Value or critical value(s), conclusion about the null hypothesis, and final conclusion that addresses the original claim.
In the last municipal election, a sample of 350 registered voters showed that 85 voted for the incumbants. Find out a 98% confidence interval estimate for the proportion of all voters voting for the incumbants.
q1 if light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500
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