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Suppose that 47% of all adult women think they do not get enough time for themselves. An opinion poll interviews 1925 randomly chosen women and records the sample proportion who feel they don't get enough time for themselves.
A) Describe the sampling distribution of P(hat)B) The truth about the population is p=.47. In what range will the middle 95% of all sample results fall?C) What is the probability that the poll gets a sample in which fewer than 45% say they do not get enough time for themselves. Show your method.
In order to determine the effect of secondhand smoke, the state agency needs to measure the nicotine level at the work site. It is not possible to measure the nicotine level for every company that reports to the agency.
In the regards to a stem-and-leaf plot that best represents the given data, what would the stem be? Determine which stem would have the most leaves and explain what this means in terms of the GPA's.
Test the hypothesis that the average price is higher than $1.87. Use level of significance α = 0.05.
The diameter of stabilizing O-Rings washers manaufactured at a large factory is expected to be normally distributed with a mean of 1.30 inches and a standard deviation of 0.04 inches.
Determine the t values that form boundaries of critical region for two-tailed test with a = .05 for each of the given df values.
A dietitian investigated whether apples washed in hot water or in cold water turned brown at different rates when exposed to air. She took 13 random apples and cut each in half.
Part 1: Define and explain historical research. Explain a situation in which historical research would be appropriate. Part 2: Explain the difference between external and internal evidence and give examples of each.
As part of a study of corporate employees, the Director of Human Resources for PNC, Inc. wants to compare the distance traveled to work by employees at their office in downtown Cincinnati with the distance for those in downtown Pittsburgh.
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...
Solve problem graphically1. Describe optimal solution and objective function value in context of the problem.
A snack company distributes chips in bags labeled 6 ounces. The local Bureau of Weights and Measures randomly selects 50 bags of chips and obtains a sample mean of 5.9 ounces.
Sample data was collected in a study of calcium supplements and their effects on blood pressure. A placebo group and a calcium group began the study with blood pressure measurement.
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