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Determine the X2 percentile that is required to construct each of the following CI's:
a) Confidence level= 95%, degrees of freedom= 24, one-sided (upper)
b) Confidence level= 99%, degrees of freedom= 9, one-sided (lower)
c) Confidence level= 90%, degrees of freedom= 19, two-sided
In analyzing two independent small samples you notice that the standard deviation for both samples are the same. How does this affect the S2p (the pooled variance)? Explain your answer.
A study of 200 advertising firms revealed their income after taxes: What is the probability an advertising firm selected at random has under $1 million in income after taxes?
the below two question must have a minimum 250 word count and use examples to support the solution. only use usa based
Engineers hoped to base their decision on re- actions of 50 drivers, but time and budget constraints may force them to cut back to 20. How would this influence the power of the test? Describe.
Increasing confidence level will increase width of confidence interval. This is because the fact that increasing confidence interval will increase value of z(α/2), which will increase the size of standard error (z*s/√n).
Consisting of tire sales (in thousands of tires) and advertising expenditures (in thousands of dollars). The equation of the least squares line is, y = 3 + 1x. Provide a managerial interpretation of the estimated slope.
The amount of a brand of soda in 12-ounces can is approx. normal with a mean of 12.1 ounces and a standard deviation of 0.15 ounces.
Find out the test statistic P-value, and critical value, and state the final conclusion. The mean IQ score of statistic professors is less than 120. Sample data: n = 46. Suppose that = 17, and the significance level is = 0.05.
Use the Emperical Rule to find what two values 68% of the data will fall between for a data set with a mean of 219 and standard deviation of 20.
About 5.5 percentage points in either direction from what would have been obtained by seeking out all Ohio State University female students." Do your results agree with this statement?
Estimate the standard deviation of the x distribution. (Hint: Review the empirical rule and SD approximations). What is the probability that a healthy 10-week-old kitten will weigh less than 14 oz?
Houston is $19,900 and in Los Angelos is $21,800. What is the probability that a brand manager in Houston has a base salary in excess of $100,000?
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