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The U.S.Census Bureau announced that the median sales price of new homes sold i April 2009 was $221,660, and the mean sales price waas $274,300. Assume that the standard deviation of the prices is $90,000.
a. If you selected samples of n=2, describe the shape of the sampling distribution of X*
b. If you select samples of n=100, describe the shape of the sampling distribution of X*.
c. If you select a random sample of n=100, what is the probability that the sample mean will be less than $300,000?
d. If you select a random sample of n=100 what is the probability that the sample mean will be between $275,000 and $290,000?
Evaluate probability values using normal distribution and How many students earned more than $36,000? _______
What is a quantitative interpretation of the slope here? (Use appropriate units in your explanation.) Although some might be concerned about the intercept being negative (you can't, after all, have a negative power use), that is not a problem. Expl..
Taking α to be 0.05, what is/are the critical values associated with testing your hypothesis?
The management of White companies considering a new method of assembling its golf cart. Compute which assembly time using the new method is faster.
Plot the data on U.S. general aviation shipments (b) Describe the patterns and discuss possible causes.(c) Would a fitted trend be helpful? Explain. (d) Make a similar graph for 1992-2003 only.
Using the EMV criteria (you wish to maximize expected profits in this case) determine what course of action that Optel should take. Make sure to state the best strategy in words.
What happens to the boundaries for the critical regions?
A poll found that 38% of male voters and 46% of female voters support a particular candidate. To test whether this candidate has equal levels of support between male and female voters, the null hypothesis should be
What effect has the transformation had on the lowest exam mark and what effect has the transformation had on the highest exam mark - STATS 201/8 Data Analysis
There are predictable stages through which every critical thinker must pass. Under what circumstances might one regress from one stage to a previous one?
Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
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