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Raw data is difficult to understand and interpret. So, to explain and interpret the data for others, we need to use graphs and charts. Review the Google Chart Editor website. Select one graph or frequency chart for discussion and analysis. Populate the selected graph/frequency chart with fictitious data. Did your selected graph/frequency chart effectively portray the data?
The populations must all be normally distributed, what is meant by normally distributed?
Set-up/solve the problem graphically. (How many ceiling fans and how many floor fans should be made?)
What about these descriptive statistics makes you wary or uncomfortable? In other words, if you were a real estate agent, would you go around spouting the answers that you gave above? Explain.
A state education agency designs and administers high school proficiency exams. Historically, time to complete the exam was an average of 120 minutes.
Use descriptive statistics to summarize the data from the two studies. What are your preliminary observations about the depression scores?
The gas price index for 1985 was 218.5 and the gas price index for 2000 was 276.8. If it cost $18.13 to fill your gas tank in 1985, how much would it have cost to fill the same tank in 2000?
Find the P value or an interval containing the P value for the sample test statistic.
An apple juice producer buys all his apples from a conglomerate of apple growers in one northwest state. The amount of juice squeezed from each of these apples
The diameters of ball bearings are distributed normally. The mean diameter is 74 millimeters and the variance is 16. Find the probability that the diameter of a selected bearing is less than 78 millimeters.
Using the 0.05 level of significance, is there evidence that the population mean is above $190? What is your answer in (a) if s = $50 and the 0.10 level of significance is used?
A real estate agent wants to compare the variation in the selling price of homes on the oceanfront with those 3 blocks away A sample of 21 oceanfront homes sold within the last year revealed the standard deviation of the selling prices was 45,600.
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the oth..
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