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Tourism is one consideration for a company's future. A survey of 1,233 visitors to China last year revealed that 110 people visited a Starbucks during their visit. Stats claim that 10% of tourists will include a visit to a Starbucks. Use a 0.05 significance level to test the claim. After testing would it be wise to convince management to increase their advertising spending to travel agents?
A clinical study was performed to determine if a product was effective in alleviating side effects caused by a mode of treatment. In the treated group (100 subjects) it was found that 10% had side effect A, 15% had side effect B and 65% had side eff..
When the purpose of sampling is to detect when a process becomes too variable the chart of choice will be a c-chart?
Jasmine is an African American graduate student. She is conducting research on the effects that affirmative action programs have had on American corporations.
A student wanted to construct a 95% confidence interval for the average age of students in her statistics class. She randomly selected 9 students. Their average age was 19.1 years with a standard deviation of 1.5 years. What is the best point esti..
Thompson Machine Works purchased several new, highly sophisticated machines. The production department needed some guidance with respect to qualifications needed by an operator. Four variables were listed.
Formulate a linear programming model that can be used to determine the number of units each model that should be produced in order to maximize the total contribution to profit
Construct a 99% confidence interval for the proportion of Americans who live in neighborhoods with acceptable levels of carbon monoxide.
If the researcher computes the t-statistic to be 4.2 and t-value found in t table for df=60 and level of significance of 0.5, is 2.0 researcher would accept or reject null hypothesis.
Give the expected value and standard deviation of defective shoes in the ShoeFit store order.
If, 20 patients improved, 7 declined, and 3 remained the same, assess whether or not patients undergoing this treatment are showing significant change from baseline to 3 months afterward. Report a p-value.
Find the range, standard deviation, and variance for the scores.
The length of time to do a complete full service oil change at Speedy-Lube is normally distributed with a mean of 15.8 minutes and a standard deviation of 2.2 minutes
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