Assume a discrete distribution for the number of possible sunny days in Provo, Utah during the week of April 20 through April 26. For this discrete distribution, p(x)=0 when x cannot occur, or p(x)>0 if it can. Based on this information, what is the probability of it being surely on 5 days and on 10 days during the week 5 Days of Sunshine 10 Days of Sunshine()①A. A positive value Infinite ②B. Zero Infinite ③C. A positive value Zero
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In order to test whether the mean IQ of employees in an organization is greater than 100, a sample of 30 employees is taken and the sample value of the computed test statistic, tn-1=3.4. The null and alternative hypothesis are:()
A. H0: μ=100; Ha: μ≠100.
B. H0: μ≤100; Ha: μ>100.
C. H0: X=100; Ha: X≠100.
A researcher is testing whether the average age of employees in a large firm is statistically different from 35 years ( either above or below). A sample is drawn of 250 employees and the researcher determines that the appropriate critical value for the test statistic is 1.96. The value of the computed test statistic is 4.35. Given this information, which of the following statements is FALSE The test:()
A. is two- tailed.
B. indicates that the researcher will reject the null hypothesis.
C. has a significance level of 95%.
A nursery sells trees of different types and heights. Suppose that 75 pine trees are sold for planting at City Hall. These 75 trees average 60 inches in height with a standard deviation of 16 inches. Using this information, construct a 95 percent confidence interval for the mean height of all trees in the nursery:()
A. 60±1.96(16).
B. 0.8±1.96(16).
C. 60±1.96(1.85).
A basic assumption of technical analysis in contrast to fundamental analysis is that:()
A. security prices move in patterns, which repeat over long periods.
B. aggregate supply of and demand for goods and services are key determinants of stock value.
C. a stock’s market price will approach its intrinsic value over time.