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Within each of your current careers/ jobs, there are sets of data that can be analyzed. For example, a teacher can use a set of test scores, a dietician can analyze a set of patient weights and correlate them to incidences of diabetes, and a salesperson can look at their clients' previous buying behavior to focus marketing. Your job this week is to think of a set of data that is important to to your current work environment (and a student can count as a work environment). Your data set should be useful and should include have at least 20 numbers in the set. With that set, perform the following operations:
* find the mean, median, mode, and range.
* find the variance, standard deviation and margin of error.
* construct a 95% and 99% confidence interval.
* analyze your statistics to see what types of conclusions you can draw.
The market model relating the rate of return of stock XYZ (denoted RXYZ) to the rate of return Of a broader index of the stock market (denoted RM) is reported as:
Describe the standard normal distribution. Explain why it can be used to find probabilities for all normal distributions.
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank sum test, evaluate the significance of the results, assuming there are no ties.
Are the following statements a valid pair of null and alternative hypothesis?
Setermine the probability that a specific driver had exactly two violations?
At.05 significance level, can we conclude that larger proportion of the agents think the economy is expanding this month?
Given what you've learned in this module about the meaning of "statistics", choose one of the examples from Part I (A-F), and raise a relevant question of your own that could be answered by a statistician.
The total blood cholesterol concentrations, in mg/dL, are shown below for a random sample of six people. In the table below, x is the age of the subject and y is the subject's total cholesterol concentration. Find the 95% prediction interval when ..
On a test with a population mean of 75 and standard deviation equal to 16, if the scores are normally distributed, what percentage of scores fall below a score of 83.8?
Using the simple test of independence (described in the lecture), decide if the events high calorie and high fiber are independent or dependent. Show your work.
What is the 95% confidence interval estimate of the mean television viewing time per week during the 8:00 p.m. to 11:00 p.m. time period?
Find out the mean number of letters that will arrive in two days.
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