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(a) A farmer picks pumpkins from a large field. The farmer makes samples of 300 pumpkins and inspects them. If one in thirty pumpkins are not fit to market and will be saved for seeds, what is the expected value of the mean of the sampling distribution of sample proportions for the number of unfitted pumpkins? What is the corresponding standard deviation of the mean of the sampling distribution?
(b) A store surveys customers to see if they are satisfied with the service they received. Samples of 55 surveys are taken. One in five people are unsatisfied. What is the expected value of the mean of the sampling distribution of sample proportions for the number of unsatisfied customers? What is the corresponding standard deviation of the mean of the sampling distribution of sample proportions
Below is some information about Exxon Mobil [XOM] taken from the Google Finance website. According to the CAPM, what is their cost of equity
A weight-loss company wants to statistically prove that its methods work. They randomly selected 10 clients who had been on the weight loss program for between 55 and 65 days. They looked at their beginning weights and their current weight. The st..
More on insurance An insurance company claims that in the entire population of homeowners, the mean annual loss from fire is µ = $250.
What's the probability that a randomly chosen worker is neither married nor a college? graduate?
generate numerical and graphical descriptive statistics for each variable. which tests is this asking for? there are 4
Assuming Xi are independent RV's and we are given E(Xi) = mu and Var(Xi) = sigma squared, how would we go about finding the mean of X-bar squared?
He wants to be 95% confident that his estimate is correct. If the standard deviation is $1050, how large a sample is needed to get the desired information and to be accurate within $200?
The chance would be very small." Explain to your friend what he doesn't seem to understand about probability.
According to the Bureau of Economic Analysis, the savings rate of American households, defined as a percentage of the disposable personal income, was 4.20% in 2009.
The average chain length of a polymer produced in a batch reactor is given as 200 units, where chain length itself is known to be a geometric random variable. What fraction of the polymer product is expected to have chains longer than 200 unit..
The hypothesized value of the average shoe size in the population is 9, and observed shoe size in our sample of 1,000 men is 10, with a standard deviation of 2.
Explain the difference between observed frequency and expected frequency as it relates to Chi-Square test
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