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Suppose that in fact the blood cholesterol level of all men aged 20 to 34 follows the normal distribution with mean of 188 milligrams per decileter and standard deviation of 41 mg/dl. in an srs of 100 men what is the probability that x bar takes a value between 185 and 191 mg/dl?
Digital camcorder repair service has set the goal not to exceed average of 5 working days from time unit is brought in to time repairs are completed. Compute the t-value.
Last year the records of Dairy Land Inc., a convenience store chain-What is the p-value? Follow the five-step hypothesis testing procedure.
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 belo..
There used to be an ad on TV that claimed one toothpaste was proven to be more effective in fighting tooth decay than another. One of statistics professors was interested in the study, and after 6 ads finally got the address to write away for it f..
Use a test of the difference between proportions when answering these questions.
The population (in millions) and the violent crime rate (per 1000) were recorded for 10 metropolitan areas. The data are shown in the following table.
Construct appropriate control charts for before and after introduction of the new pathway. Discuss process stability and the results.
At the 0.05 level of significance, is there sufficient reason to believe that the integers are not being generated uniformly?
Find out the upper and lower bounds on average life expectancy of the Canadian women such that at least 90% of all population is included.
Change the frequencies to percentages - is there a group more likely to get high salaries.
Estimate with 95% confidence the mean reduction in time it takes for someone who has taken the sleeping pill to fall asleep.
A promotion campaign is being planned to encourage people to reduce heat in their houses at night. In order to measure the campaign's impact, we want to determine the proportion of people who reduce their heat at night.
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