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The annual turnover rate of the 200-count bottle of aspirin follows the normal distribution with a mean of 6.0 and a standard deviation of 0.50. (This indicates that the stock of asprin turns over on the pharmacy shelves an average of 6 times per year.) It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level.
Give the formula for the test statistic.
The weights (in pounds) of a sample of five boxes being sent by UPS are: 12, 6, 7, 3, and 10.
In what height interval must the company expect to determine middle 70% of kindergarteners?
She is interested in testing the null hypothesis that the mean SAT score is the same for each type of schooling using the one-way ANOVA. Some summary statistics for the three groups are given below, followed by the one-way ANOVA table.
What is Peter's median grade point at graduation? What is the shape of the grade point distribution?
Use population distribution to determine expected juror frequencies. Test researcher's claim at a = 0.01.
The quality-control inspector checks 200 pieces in a certain operation. The piece is either good or defective. The record for nine hours.
Below are one hundred pseudorandom numbers from a uniform pdf. Set up and test the appropriate goodness-of-fit hypothesis. Let α = 0.05.
Is there a relationship between sales and newspaper?
If they must form an ethics subcommittee of 4 members, how many different subcommittees are possible?
Use PHStat to make a box-whisker plot. If PHSTAT has yet to be installed, calculate Xmin, Xmax, Q 1 , Q 3 and median using equation in Class Notes-Quartiles, Percentile & Dectiles.
Develop a linear regression model for these data and forecast carpet sales if 30 construction permits for new homes are filed.
What would that evaluation be and what is the margin of error?
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