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Sample question:
The random variable x is the number of houses sold by a realtor in a single month at the real-estate office. Its probability distribution is:
Houses sold (x)
0
1
2
3
4
5
6
7
Probability P(x)
0.09
0.24
0.21
0.17
0.03
0.15
0.02
a. Compute the mean of the random variable.
b. Compute the standard deviation of the random variable.
If life of wild pheasants follows a normal distribution with a mean of 9 months and a variance of 9, what percent of the population will be less than 11 months of age.
Assume the risk-free interest is 5%. If WT borrows $100 million today at this rate and uses the proceeds to pay an immediate cash dividend, what will be the market value of its equity just after the dividend is paid, according to MM?
How large a sample is required to estimate the mean speed with a margin of error equal to 2 miles per hour with 90% confidence?
Calculate the correlation between decorating and Christmas enjoyment - Maximize Wayne's studying effectiveness.
The average score on math portion of SAT was 516 in 2002. Assume that the math score of all students taking the SAT 2002 were normally distributed with a mean of 516 and a standard deviation of 90.
Calculate p value? What is the critical value?
Explain why it makes sense for a set of data to have a correlation coefficient of zero when the data show a very definite pattern.
Consider a sample with data values of 10,20,12,17, and 16.... Compute the mean and median and explain how you get to the answer....
Construct a time series plot. What type of pattern exists in the data? Compute the exponential smoothing forecasts for a = .2.
He surveys a sample of 40 students and finds that for the most recent semester their average cost was $430 with a standard deviation of $80. What is the test value for this hypothesis test?
The final grades for a random sample of MKT 380 students are as follows: What is the standard deviation for these data?
Can you provide an example using your own data set (two related and unrelated variables) of at least twenty numbers each and apply the formula of correlation. Determine the correlation of each of the two sets of data.
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