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Greenston coffee is experiencing financial problems because of competition. Total sales revenue has dropped by 15% and the company wished to establish a sales monitoring process to identify shops that are under-performing. Historically the daily mean sales for a shop has been $11,500 with a variance of 4,000,000. Their monitoring plan will take a random sample of 5 days sales per month and use the sample mean sales to identify shops that are under-performing. Establish the lower limit sales such that only 5% of the shops would have a sample sales mean below this value.
A. What is the 90% confidence interval for the daily sales at all restaurants. B. What is the probability that the average sales are really $32,000 or more per day? Assume that the population average is $30,000 per day and the std. Deviation is $2..
Perform hypothesis testing on one variable's data.
The mean number of flaws per 100 m of material produced on a certain machine at Blanktown Fabrics is 2. If flaws occur randomly, find the probability that in 50 m of material there will be less than 2 flaws.
Given length an athlete throws a hammer is a normal random variable with mean 50 feet and standard deviation five feet, what is the probability he throws it: Between 50 feet and 60 feet.
Below is a normal plot of residuals from a regression. Does the plot indicate any problems with the assumption that the residuals are Normally distributed
For the following scores, find the (A) mean, (B) median, (C) sum of squared deviation (d) variance, and (e) standard deviation:
Compute the unit manufacturing cost of the product under the contribution approach. Compute the effect on net income of accepting a special order for 500 units at $10 per unit assuming excess capacity.
Consider the following news headline, "Cigarette Smokers Make Lower College Grades than Nonsmokers" The news article goes on to say that researchers at a university collected information on rate of cigarette smoking (total number of cigarettes sm..
Suppose a student received the following grades for the semester: History, B; Statistics, A; Spanish, C; and English, C. History and English are 5 credit hour courses
If sample of size 10 packages is randomly chosen, and 5 percent rate holds, determine the probability that exactly 2 packages in the sample arrive late?
Calculate the average of deposits per bank for FDIC- inured institutions during both time periods and describe the relationship between the two averages. Provide a reason for the difference.
A researcher uses hypothesis test to estimate H0 µ= 80. Which combination of factors is most probable to result in rejecting null hypothesis?
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