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The mean annual cost of automobile insurance is 939 assume that the standard deviation is 245. a) what is the probability that a simple random sample of automobile insurance polocies will have a sample mean within 25 of the popluation mean for each of the following sample sizes 30,50,100, and 400?
Using your experience from previous or current employment, provide a business example where you could use a t-test to assist in a business decision. State the null and alternative hypothesis.
You have two unbiased estimates, e 1 and e 2 , of a quantity with variances V 1 and V 2 respectively, and covariance Cov {e1,e 2 } = C. Form a new unbiased estimate:
A candy company claims that 92% of consumers like their candies. To test this claim, 9571 people are selected at random from those who have eaten the company's candies.
Evaluate the mean wait time and throughput rate
Describe the similarities between an F-ratio and a t statistic. The basic relationship between t statistic and F-ratios can be stated in an equation. What is that equation?
The mean return for the random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Test the null hypothesis: H0: mu = 15% at α = 0.05.
Create a histogram for the following data of the number of miles from residence to place of employment for 30 randomly selected residents of Middletown County.
A sample of 20 cables is selected and tested. Find the sample mean that will cut off the upper 95% of all samples of size 20 taken from the population.
Are there differences in satisfaction with Intake process of clients who admit with mental health problems, substance abuse problems, or both.
The overall model statistically adequate at a 0.05 level of significance for predicting sale price(y)? For a moving average which is not true?
For each year, create a bar chart and a pie chart.
The winning team's scores in 7 high school basketball games were recorded. If the sample mean is 10.3 points and the sample standard deviation is 0.10 points,
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