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A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative action programs for women and minorities for admissions to colleges and universities. What sample size should be obtained if she wishes the estimate to be within 4 percentage points with 90% confidence if.
a. She uses a 2003 estimate of 55% obtained from a Gallup Youth Survey
b. she does not use any prior estimates
c. Why are the results from parts a and b so close.
I am required by my professor to use the statistics software, Minitab, to solve this. I am not sure where or how i can perform these operations in the program.
Women's heights are normally distributed with mean 63.6 and standard deviation of 2.5 in. A social organization for tall people has a requirement that women must be at least 70 in tall.
Sketch a curve, point out the distribution (i.e., normal , student T, Chi square), critical region(s). test statistics, critical values(s) and n p-value?
At the .05 level of significance, is there convincing evidence that the number of absences per employee has increased?
The linear correlation coefficient, r, measures the strength of the linear relationship the variables in a set of ordered pairs (x,y). What is the maximum and minimum values for r?
What is the probability that a randomly selected mango weighs less than 14 ounces?
In the history class the mean score was 76 with standard deviation 3.
With the test statistic you chose, work out the problem with solution using .05 level of significance if it applies.
Compute the incidence proportion or the risk ratio that compares group 1 to group 0, and compute the Incidence proportion or the risk ratio which compares group 2 to group 0. Then post a summary of your findings.
In a normal distribution with mean 3 and variance 49, what are the upper and lower limit scores for the middle 50% of the data?
If the same sample results had been obtained from a random sample of 16 students, could the students' claim be accepted at a lower level of significance?
A government survey conducted to estimate the mean price of houses in a metropolitan area is designed to have a margin of error of $10,000.
Calculate the average of deposits per bank for FDIC- inured institutions during both time periods and describe the relationship between the two averages. Provide a reason for the difference.
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