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1. An art dealer wants to estimate the average value of works of art of a certain period and type. A random sample of 20 works of art is appraised. The sample mean is found to be $5,139 and the sample standard deviation $640. Give a 95% con?- dence interval for the average value of all works of art of this kind.
2. A management consulting agency needs to estimate the average number of years of experience of executives in a given branch of management. A random sample of 28 executives gives x = 6.7 years and s = 2.4 years. Give a 99% con?dence interval for the average number of years of experience for all executives in this branch.
a box contains six tickets labeled with the numbers 1 4 8 15 15 15. the normal approximation to the chance that the sum
the following data are from an independent-measures experiment comparing two treatment conditions. do these data
suppose iq scores were obtained from randomly selected couples. for 20 such pairs of people the linear correlation
What is the probability that a randomly selected cell phone bill is more than $67.75?
Suppose a random sample of size 36 is drawn from a population with a mean of 278. If 86% of the time the sample mean is less than 280, what is the population standard deviation?
Write a 350- to 700-word paper in which you differentiate between valuation, depreciation, amortization, and depletion. Is it appropriate to calculate depreciation using two different methods? Why?
in bernoulli trials p let vn be the number of trials required to produce either n successes or n failures whichever
an offspring of a grey cat is grey with probability 0.6 and white with probability 0.4. an offspring of a white cat is
Population standard deviation is known to be 8 grams. Determine and interpret p-value for testing that mean weight of Take-a-Bite is less than 175 grams.
A 90% confidence interval estimate for a population mean was computed to be (38.2, 59.4). Determine the mean of the sample, which was used to determine the interval estimate.
q1. bmi in children is approximately normally distributed with a mean of 24.5 and a standard deviation of 6.2. a bmi
an electrical firm manufactures a 100-watt light bulb which according to specifications written on the package has a
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