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If 200 of the adults surveyed were in the age category of 24 and under and they provided a standard deviation of $14.50, construct a 95% confidence interval for the weekly average expenditure on fast food for adults 24 years of age and under. Assume fast food weekly expenditures are normally distributed.
Survey of 16 tax returns reports families with incomes between $75,000 and 100,000 have on average $8,562 in Standard Deductions with the standard deviation of $1,800.
A random sample obtained from a population has a mean of µ=100 and a standard deviation of σ = 20. The error between the sample mean and the population mean for a sample of n = 16 is 5 points and the error between a sample men and population mean ..
you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. What is the value of your pooled proportion?
Use the relative frequency approach to construct a probability distribution for the number of tests taken.
In the end, of course, conclusions are drawn about how an entire population would respond based on the responses from randomly selected group of people.
Determine the shape of chi-square distribution?
Use alpha level. 05 to compute and interpret Pearson's r and to test whether it is important (using all your steps for hypothesis test).
The heights of young women are approximately normal with mean 65 inches and standard deviation 2.5 inches.
which is a value often used for the upper limit of the range of normal values. What do the results suggest about the sample group?
Critically discuss understanding the normal distribution and the factors that affect its shape important in solving business and marketing-related questions?
Supposing that both tests measure the same kind of ability, who has the higher score? If grading were done on a curve, what would their respective percentages be?
Consider the following situation describing layoffs at a manufacturing plant of the Monsanto Company. Does there appear to be a case of age discrimination between those laid off and those non-laid off?
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