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The estimate of the population proportion is to be within plus or minus .04, with a 98 percent level of confidence. The best estimate of the population proportion is .25. How large a sample is required? (Round up your answer to the next whole number.)
Using a 2-month weighted moving average, with weights of 2 for the most recent month and 1 for the previous month develop forecasts sales for March to June inclusive.
when computing a t-test it is important to distinguish between directional and nondirectional hypotheses as the
Apply the EOQ model to the following quantity discount situation in which D=500 units per year, C0=$40, and the annual holding cost rate is 20%. What order quantity do you recommend?
Determine the Midrange. Determine the Standard Variance. Determine the Standard Deviation
The bacteria Escherichia coli are commonly found in the human bladder. Suppose that 3000 of the bacteria are present at time t-0. Then t minutes later, the number of bacteria present can be approximated by:
The analysis needs to be re-run adding the error into the regression sum of squares.
an important application of regression analysis in accounting is in the estimation of cost. bycollecting data on volume
The credit score of a 35 year old applying for a mortgage at Ulysses Mortgage Associates is normally distributed with a mean of 600 and a standard deviation of 100.
Suppose that you want to set up a statistical test to challenge the claim of 6.7 seconds. What would you use for the null hypothesis?
Sample mean of $14.68 per hour. Assuming the population standard deviation of σ = $145, can we conclude that an increase occurred in the mean hourly earnings since 2001? Use α = .05.
The weights (in grams) of four different colors of M&M candies are given below, along with the mean weight and variance of each color, and the variance of the sample means.
What is the expected value of the sampling distribution model for the proportion of 480 freshmen that will return to the same school for their sophomore year?
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