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A recent survey found that 86% of the population has never been a victim of a violent crime. if a sample of 13 is selected at random, find the probability that 11 or more have never been a victim of a violent crime. Does it seem reasonable that 11 or more have never been victims of violent crimes?
Amount of housework done by men and women in dual-earner marriages. The study showed that 67.5% of the men felt that the division of housework was fair?
In this problem set you will get some practice performing hypothesis tests for two samples. If you use Statdisk to perform any portion of these analyses, please include the results, label them, and refer to them accordingly in your interpretations..
Suppose the college in question 12 has only graduated 10,000 students. Construct a 96 percent confidence interval for the mean time required for all graduates to earn a bachelor's degree.
What can you conclude from these data? Did all the bacteria present in each saliva sample grow?
Give 0.95 probability bounds on the value of the sample mean that would be obtained. Also give 0.90 probability bounds on the value of the sample mean.
Was your test one-tail upper tail, lower tail, or two-tail? Explain why you chose that kind of test in this situation. Explain what your P-value means in this context.
If the true mean for Saturday sales is now $4500, what is the probability of accepting the (false) null hypothesis.
The average credit card debt for college seniors is $3,262. If the debt is normally distributed with a standard deviation of $400, find probabilities. that the senior owes at least $1,000
The overall average for the samples is 17 ounces. The range is only 0.5 ounce. Determine the upper and lower control-chart limits for averages for the boxes of cereal.
construct a grouped frequency distribution for the data given below184 174 180 172 184 175 180 178 183 180173 180 182
1.makers of generic drugs are required to demonstrate that their generic drug does not differ significantly from the
Most individuals are aware of the fact that the average annual repair cost for an automobile depends on the age of the automobile. A researcher is interested in finding out whether the variance of the annual repair costs also increases with the ag..
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