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Home >> Statistics and Probability
1. What is statistical power?
2. How does a researcher decide whether to use a one-tailed or two-tailed test?
3. What are the advantages and disadvantages of using a two-tailed test?
Statistics and Probability, Statistics
Great start to our discussion on short term planning and the operating and cash cycles. talk about if every businesses have similar operating cycles? If not give examples of how and why they are different? Give referen ...
The average starting salary for graduates at a university is $33,000 with a standard deviation of $2,000. If a histogram of the data shows that it takes on a mound shape, the empirical rule says that approximately 68% of ...
A clinical psychologist is the primary therapist for 18 patients. She randomly selects a sample of 3 patients to be in her study. How many different samples of this size can be selected from this population of 18 patient ...
In order to fund her retirement, Helen needs her portfolio to have an expected return of 13.8 percent per year over the next 30 years. She has decided to invest in Stocks 1, 2, and 3, with 25 percent in Stock 1, 50 perce ...
On a correlation matrix, you will usually see two values per comparison. The top value for a correlation measurement will be the Pearson correlation, right under that you will see a p-value. I understand when you have a ...
You have graduated from college but unfortunately have $33,000 in outstanding loans. The loans require monthly payments of $3,700, which covers interest and principal repayment (that is, the loan has the same basic featu ...
Could someone help with my homework question? Recovery time for knee surgery patients that do physical therapy three times per week on average is 16.3 weeks with a standard deviation of 2.4. A physical therapist believes ...
In a sample of 28 cups of coffee at the local coffee shop, the average temperature was 162.5 degrees with a standard deviation of 16.7 degrees. What would be the 95% confidence interval for the temperature of your cup of ...
An annual survey of first-year college students ask 273,000 students about their attitudes on a variety of subjects. According to a recent survey, 57% of first-year students believe that abortion should be legal. Use 0.0 ...
Given the following values: = 20, M = 16, = 0.7, conduct a one-sample z test at a .05 level of significance. What is the decision for a two-tailed test? A) to reject the null hypothesis B) to retain the null hypothesis C ...
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p
Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As
Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int
Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As