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Determine the margin of error in estimating the population mean. a sample of 68 college students yields a mean annual income of $3248. Assuming that the standard deviation = $885, find the margin of error in estimating mean at the 99% level or confidence.
Biologist estimates that 50% of the deer in a region carry a certain type of tick. For a sample of 300 deer selected at random, what is the chance that 155 or fewer deer have this tick?
Given 0.2, 0.4, and 0.4 are the probabilities for the sale of 100, 200, or 400 dozen roses, respectively, then the EOL for buying 200 dozen roses is?
A salesperson makes four calls per day. A sample of 100 days gives the following frequencies of sales volumes.
What sample size is need if the agency wants to be 90% confidence of being correct to within +/- 5 minutes? if 90% is desired, how many listeners need to be selected?
If a blue ball is selected you win nothing. Let X be the amount that you win. The expected value of X and let the random variable X be a random number with the uniform density curve given below
Find the probability that in a given year a) exactly one major hurricane will strike the U.S. mainland, b) at most one major hurricane will strike the U.S. mainland.
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.
With a selling price of 40 dollars each, how many pool cues must be sold to break even? What would the total revenue be at this break even point?
The manager of the greeting card section of Mazey's department store is considering her order for a particular line of Christmas Cards. Develop the payoff table for this decision situations.
The average gasoline price of one of the major oil companies in Europe has been $1.25 per liter. Recently, the company has undertaken several efficiency measures in order to reduce prices.
Compute a 90% confidence interval of the mean for a Weschler intellegence test with mean of 100.00 and standard deviation of 15.00 for a sample of 100 people. Use two decimal places.
Consider a random sample of six families who are asked if their children have an influence on their vacation destination.
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