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A gas statopm sells an average of $1,000.00 per day of gas with a standard deviation of $100.00. Assuming sales are normally distributed, what is the probability that total sales for a 7 day period are $,7,700.00 or more.
For following set of scores, prepare a frequency distribution, a histogram, and a stem-and-leaf display for each variable. Also calculate the mean, the median and the standard deviation of each score.
If the service manager wants to 95% confident that the overall time is correctly estimated, with a 3 percent probability of error, what sample size should be taken.
What is the probability that exactly 5 nonconforming parts are produced during a 1-hour period? What is the probability that at least 5 nonconforming parts are produced during a 1-hour period?
Now assume institutional cache is used. Hit rate for cache is 0.6. Determine the total average response time.
Scrap rates per thousand (parts whose defects cannot be reworked) are compared for 5 randomly selected days at three plants. Does the data prove a significant difference in mean scrap rates?
The manager of a package courier service believes that packages shipped at the end of the month are heavier than those shipped early in the month.
Sample mean varies from population mean of 10 pounds at 5 percent level of significance using two-tailed test. Compute test statistic for the sample data.
Based on p=.60, probability that a randomly selected homeowners will say no to newspaper subscription.
Determine the probability that none of the calculators will be defective?
Denote the Bergen County population mean as µ1 and the Morris County population mean as µ2. Using a significance level of your choice, carry out a hypothesis test for H0: µ1 ≥ µ2.
How would I go about finding a 95% confidence interval for the population mean if a sample of size 20 has a mean of 18.2 and a sample standard deviation of 3.6?
Read the data from the fictitious research study regarding diabetes and alcohol consumption, and analyze and interpret the results.
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