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A university in 1985, a proportion of .47 of sociology majors were women. You assess the gender composition of a random sample of 187 sociology majors at the same university today and discover 105 females. Test a hypothesis to see if this proportion has changed since 1985. I have the standard error and a t-score of 1.660. I need the test effect, test statistic and p-values.
The top 25 companies ranked by market capitalization operating in the washington DC, area along with the year they were founded and the number of employees are given below.
When is a regression equation used? What terms describe the fit of a regression equation to the data? What is the importance of the coefficient of determination (r2)?
The Penguin Company employs 200 men and 50 women. Of the male employees, 140 work in the plant, 20 are in the office, and 40 are field salesmen.
The City Transit Authority plans to hire 8 new bus drivers. From the group of 100 qualified applicants, of whom 55 are men and 45 are women, 8 names are to be selected by lot. Suppose that Mary and John Lewis are among the 100 qualified applicants..
compute the expected value and variance of U.Determine Expected value and variance using uniform distribution.
An investor estimates that there is a 1 in 10 chance that a stock purchase will lose 20% of its value, a 2 in 10 chance it will break even, a 4 in 10 chance it will gain 15% and 3 in 10 chance it will gain 30%. What is the expected return.
We can use two products at my work, which are mutual funds and see if there is a correlation between the two. The two different funds are: a domestic stock mutual fund, which only invests in large organizations (large cap companies) based here in..
The manager of a department store wants to determine what proportion of people who enter the store use the store's credit cards for their purchases.
Please explain the term analysis variance so a person without formal statistics education can understand.
The simple random sample is n = 14, σ = 12.5 and the original population is normally distributed.
Formulate the hypotheses to determine whether or not the lathe is in perfect adjustment.
Also include information about the number of participants you would assess and how you would go about estimating effect size and statistical power (when relevant).
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