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A) A nutritionist wants to estimate the mean amount of cholesterol in a certain variety of chicken eggs. She wants to be within 14 mg. with 99% confidence. It is believed that the standard deviation is 25 mg. How large a sample of eggs should she use?
B) A nurseryman wants to estimate how many poinsettias he will need for Christmas. He estimates the standard deviation to be 15. If he wishes to be 95% certain of having enough plants, how large a sample must he take to be within 5 plants?
C) The manager of a supermarket wants to estimate the proportion of customers who will be using food stamps at his store. How large a sample is required to estimate the true proportion to within 2% with 99% confidence?
What is the point estimate of the proportion of the population of employees who strongly dislike their current work experience (to 2 decimals)?
Below, explicitly state slope of your trend line and describe what value of slope signifies in terms of this context.
Utilizing the 5% level of significance was there a significant change in cholesterol level. Elucidate your answer to someone who has never ever taken a course in statistics.
Suppose population standard deviation for those drinking regular coffee is 1.20 cups per day and 1.36 cups per day for those drinking decaffeinated coffee.
Find a 90% confidence interval for the mean amount left by all groups.
What is the probability that more than 25% of the business travelers say that the reason for their most recent business trip was an internal company visit?
The mean of a set of 7 numbers is 13. What is the sum of the numbers? Find the mode of the following test scores: 89, 78, 91, 82, 75, 89, 84, 95, 89, 93
A high school counselor is interested in the percentage of students who will be going to college. She randomly picks 60 students and finds that 53 will be going to college. Use a 95% confidence level to find the population proportion.
Assume the observed value of the test statistic is 1.53. What is the smallest level for which there is sufficient evidence to reject H 0 (i.e. the p-value for this test)?
If 36 women are selected at random, find the mean, and standard deviation, of the population of sample means. Suppose that the sampling is done without replacement and use a finite population correction factor.
Use the study to estimate the risk of an air bag fatality on a child seated on the front passenger seat.
Computing the expected values for the given probability distribution and evaluate the expected values of the following probability distributions
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