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The following quantities of coffee purchases were made at a coffee kiosk in the lobby of an office building over a 13-week period:
Week PurchasesWeek 1 87Week 2 81Week 3 75Week 4 75Week 5 75Week 6 70Week 7 62Week 8 62Week 9 62Week 10 62Week 11 62Week 12 56Week 13 56
1.Calculate the mean, median, and mode for the data.
2.Prepare a frequency distribution for the data.
3.Calculate the standard deviation for this data.
4.Explain why statisticians typically use the standard deviation rather than the average deviation.
the null hypothesis is to be tested at 95% confidence. Determine the critical value(s) for this test.
Find a 90% confidence interval for the population mean weight of all such turtles.
Determine whether the following situations represent a right, left or two-tailed test: In 1997, 43% of Americans 18 years or older participated in some form of charity work.
If the production process is in control, the mean number of chips per cookie is 6.0 What is the probability that in any particular cookie being inspected. What is probability that in any partcular cookie being inspected, there are less than 4 choco..
A survey conducted by the American Automobile Association showed that the family of four spends an average of $215.60 per day while on vacation. Suppose a sample of 64 families of four vacationing at Niagara Falls results in a sample mean of $252...
An average computer mouse inspector can inspect 50 mice per hour. The 48 computer mice inspectors at a particular factory can only insppect 46 mice per hour with a standard deviation of 10.
Has there been a significant decrease in the proportion of students who change their major after the first year in this program? Test at the .05 level of significance.
Assume a mean wage of $1,000 and standard deviation of $100. What's the probability of finding an employee with a wage of between $790 and $1000?
The topic I am treating now is based on using qualitative analysis based on grounded theory to investigate the topic "Mature student studying at University".
Assume you want to repeat the FDA experiment to achieve an estimation of the mean μ of the amount of caffeine content of a cup of coffee.
State the correct decision and give justification for your decision.
An independent financial advisor claims an average rate of return, μ, on a particular investment is at least 7%. In testing her claim, the correct pair of hypotheses is:
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