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Farmers Insurance Group would like to test the hypothesis that the average number of miles driven per month by a male driver exceeds the average number of miles driven per month by a female driver by more than 50 miles. The following data summarizes the sample statistics for the miles driven per month by each gender. Assume that the population variances are equal.
Male
Female
Sample mean
685
580
Sample size
13
16
Sample standard deviation
130
120
Define Population 1 as male drivers and Population 2 as female drivers and use the critical value approach to test this hypothesis with alpha = 0.05.
Based on a sample of 49 students, Healthy Lifestyles Incorporated (HLI) would like to apply the central limit theorem to ma ke various estimates. a) Compute the standard error of the sample mean. (Round your answer to 2 decimal places.)
Draw the graph for the distribution of these data and label it both in terms of raw scores and z-scores. Identify the percentage of students who scored in the following ranges of raw scores:
Number of rescue calls received by rescue squad in city follows a Poisson distribution with mu = 2.83 per day. Squad can handle at most four calls a day. Determine the probability that squad will be able to handle all calls on a particular day?
suppose that in a box of 20 iphone devices there are 5 with defective antennas. in a draw without replacement if 3
If you must estimate the population mean within 10 days, how many outside salespeople should you sample? Use the 90 percent confidence level.
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A mean of 25 inches and a standard deviation of 5 inches. What is the probability that the area receives at least 30 inches of rain in a year?
What proportion of the variability in steel shipments for motor vehicles is described by regression equation?
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Compute a 90% confidence interval of the mean for a Weschler intellegence test with mean of 100.00 and standard deviation of 15.00 for a sample of 100 people. Use two decimal places.
Estimate a range of values centered about the mean in which about 95% of the state per captia income taxes will fall.
Could this information be viewed as representing the ratio scale of measurement? If so , explain why. If not, why not.
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