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One can calculate the 95% confidence interval for the mean with the population standard deviation known. This will give us an upper and a lower confidence limit. What happens if we decide to calculate the 99% confidence interval? Describe how the increase in the confidence level has changed the width of the confidence interval. Do the same for the confidence interval set at 80%. Please include an example with actual numerical values for the intervals in your post.
5. Sixto Sanchez is the owner of Suburban Stylists. He is evaluating the service level provided to walk-in customers. Because he is enrolled in an MBA program at Eastern University, Sixto decides to sample walk-in customers for the next two w..
Our judicial system operates under a similar principle
What is the mean number of ducks that are killed and what is the expected number of hunters who hit the duck they aim at?
A medical doctor wishes to test the claim that the standard deviation of the systolic blood pressure of deep sea divers is greater than 450. To do so, she selected a random sample of 25 divers and found s = 468.
A sample of 9 managers with over 15 years of experience has an average salary of $71,000 and a sample standard deviation of $18,000. Assuming that the salaries of managers with over 15 years experience are normally distributed, you can be 95% confide..
Suppose the number of days it takes you to get a flu shot
In survey of women in a certain country (ages 20-29), the mean height was 63.4 inches with a standard deviation of 2.92 inches. Answer the following questions about the specified normal distribution.
A study of 37 graduates of four-year colleges revealed the mean amount owed by a student in student loans was $16,381. The standard deviation of the sample was $1,352. Construct and explain a 90% confidence interval estimate of the population mean am..
The length of the snake Vipera bertis (X), measured in centimeters, is assumed to be normally distrubuited with mean 63 and variance 22. The weight (Y) is measured on grams, can be calculated by using Y= -300 + 7x.
Measured the tail lengths of 250 cats, and found that the average length is 28 cm and the variance is 75 cm2. If these tail lengths are normally distributed, (A) what would the mean and the variance equal if we multiplied each tail length by three? (..
a. Estimate the number of games in the sample that the Colonials win by giving the mean of the relevant distribution (that is, the expectation of the relevant random variable). Do not round your response.
Use the sample and confidence level to construct the confidence interval estimate of the population proportion p. n=500, x=400, 95% confidence_
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