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Tom Sevits is the owner of the Appliance Patch. Recently Tom observed a difference in the dollar value of sales between the men and women he employs as sales associates. A sample of 40 days revealed the mean sold a mean of $1,400 worth of appliances per day with a standard deviation of $200. For a sample of 50 days, the women sold a mean of $1,500 worth of appliances per day with a standard deviation of $250. At the 0.05 significance level can Mr. Sevits conclude that the mean amount sold per day is larger for the women?
Finding an X score. All Bright University will consider an applicant for its MBA program who scores 95 percent or higher on the GMAT exam. The mean and standard deviation, respectively, for this test are 578 and 94. What is the lowest score (X) th..
Results from survey of 1000 respondents, point out that 545 favour the dealth penalty for capital crimes. By using a90% confidence level. Create confidence interval estimate for population proportion.
95% confidence interval evaluate for proportion of Americans who believe Abraham Lincoln is United States' most outstanding President is 65% to 75%. If more precise estimate is requested, then confidence level.
The mean number of passengers per flight is 160 with a standard deviation of 20. The aircraft used for the route has 200 seats.
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
To determine monthly rental prices of apartment units in San Francisco Bay area, samples were constructed in the following ways. Identify the technique used to produce each sample.
When would you use hypothesis testing and when would you use confidence intervals?
At 95% level of confidence, can we conclude that the babies using the Gibbs product gained less weight?
Does the data prove a significant difference in mean times?
Compute mean, standard deviation, coefficient of variation and 5 key percentiles for these data.
Find out the range of the following set of whole numbers: 12, 13, 15, 17, 12, 18, 12, 19, 13, 12, 14, 13, 12, 15
A concessionaire for the local ballpark has made a table of conditional values for the different alternatives also states of nature
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