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Forecasters interest rate predictions over the period 1982 1990 were studied to see whether the predictions corresponded to what actually happened. The 2 Ã- 2 contingency table below shows the frequencies of actual and predicted interest rate movements. Research question: At ? = .10, is the actual change independent of the predicted change? (Data are from R. A. Kolb and H. O. Steckler, â??How Well Do Analysts Forecast Interest Rates?â? Journal of Forecasting 15, no. 15 [1996], pp. 385=394.)
Forecasted Change Rates Fell Rates Rose Row Total
Rates would fall 7 12 19
Rates would rise 9 6 15
Col Total 16 18 34
A computer password consists of four characters. The characters can be one of the 26 letters of the alphabet. Each character may be used more than once. How many different passwords are possible?
Find the value of W, the test statistic for a two sample rank-sum test that would compare the two methods for losing weight. Give the details of how you found W. Please show your step-by-step hand calculation here.
Using Chi-square table finding the P-value and interpret the result
Findout the value of X using normal distribution which gives standard deviation also mean. A math teacher gives two different tests to measure students' aptitude for math.
Develop appropriate hypotheses such that rejection of H0 will support the researcher's contention.
Test of claim for the statement made for a given paired sample:
How many voters required to be sampled to evaluate the proportion within 0.05 with 95% confidence?
The following frequency distribution reports electricity cost for sample of 50 two-bedroom apartments in Albuquerque, New Mexico during the month of May last year.
The 2006 General Social Survey asked, "what do you think is the ideal number of children for a family to have?" The 1097 females who responded had a median of 2, mean of 3.16, and a standard deviation of 1.91.
Determine the probability that at most 4 fish will be killed?
Find the 99% confidence interval for the population proportion.
Using the original data, estimate the population standard deviation with 90% probability.
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