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A company is studying the number of daily debit card purchases. if there were 20 purchases and the probability of a debit card purchase is 0.5. a) Of the 20 purchases, what is the expected value of the number of debit card purchases? b) What is the standard deviation of the number of debit card purchases? C) What is the probability that exactly 5 purchases were made by debit cards? D) Based on the shape of the distribution, approximately 99.7% of the purchases should be between which two values?
What is the slope? What is the y-intercept? Is the line dashed or solid? Is the area shaded below or above the line?
Develop the 5-Step Hypothesis Test for a particular claim related to your work or life environment. (This should be a test of one-sample mean or one-sample proportion.
How to identify the subjects who are closest to the cutoff for the upper 2.5% and 5% of the scores and the lower 2.5% and 5% of the scores when looking at the z-scores?
in an opinion poll 500 people are interviewed and 29.5 answer no to a particular question.calculate the lower limit
a set of 50 data values has a mean of 15 and a variance of 25.nbsp find the standard score of a data value
A random sample of 14 days shows Xbar = $502.95 and s = $64.00. You can assume normality. Using alpha = 4%, is the sampling result significant? Explain.
1 a five member committee has to be formed from a special group of 7 republicans and 8democrats.a in how many ways can
A bank has determined that the monthly balances of savings accounts of its customers are normaly distributed with an average balance of $1200 and standard deviation of $250.
Find the mean, median, mode, variance, standard deviation, frequency table, cumulative frequency table, coefficient of variation, and mean deviation of the population.
1. dan is working to get through his general education requirements at a local community college. as a result he is
Supposes that the diameter of bearings are independent normally distributed random variables with mean µB = 1.005cm and variance σ²B = (0.003)² cm² . The diameter of shafts are independent normally distributed random variables having mean µB = 0.9..
Level integer between 0 and 9, the compression level when writing. AllowNonCompressed logical. When reading, should non-compressed input be allowed?
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