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The manager for State Bank and Trust has recently examined the credit card account balances for the customers of her bank and found that 20% have an outstanding balance at the credit card limit. Suppose the manager randomly selects 15 customers and finds 4 that have balances at the limit. Assume that the properties of the binomial distribution apply.
What is the probability that 4 or fewer customers in the sample will have balances at the limit of the credit card?
Determine the frequency of wrong numbers given to callers. Each sample consisted of 100 calls. Determine 95 pct limits. Is the process stable(i.e., in control)? explain.
Your specific assignment for this week is to choose a type of quantitative data to gather from your own life. How many minutes does it take yo to get to work everyday.
a random sample of n 9 structural elements is tested for compressive strength. we know that the true mean compressive
A company's headquarters is located in downtown Chicago. The company is interested to know the mean driving time of its employees if they require their employees to start working at 6:00 am. Fifty employees are randomly sampled over four weeks and..
A mean of 2000 pounds and a variance of 2500 pounds. Let X be the mean of any sample of 100 ropes selected at random. find the expected value and the standard error of X.
A software company wants to determine whether there is a relationship between their three sales offices and the sales of their software products. The actual sales results are
What is the decision regarding H0? " "Imagine you are conducting a left tailed test of proportions; level of significance is 0.05; calculated z-value is -2.00;
For one consumer product the mean dollar sales per retail outlet last year in a sample of 15 was $3,425 with a standard deviation of $500. For a second product the mean dollar sales per outlet in a sample of 12 stores was $3,250 with a standard de..
Show that Q3 is an unbiased estimator for q and if Q1 and Q2 are independent, how should the constant a be chosen in order to minimize the variance of Q3?
Sampling variability refers to the idea that different samples will include different individuals
question the table shows regulation distances between hurdles in womens and mens races. in both the womens and mens
let x be binomial with parameters n15 and p.2a find the expression for density for xb find the expression for the
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