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Based on past records, the probability is 0.7 that a person shopping at a certain store will spend less than $20.
a. What is the probability that 19 from a sample of 22 shoppers will spend less than $20?
b. What is the probability that at least 12 but not more than 17 from a sample of 22 shoppers will spend less than $20?
The average price of a personal computer is 949 assuming that the prices are normally distributed with a standard deviation of 100 what is the price that corresponds to the least expensive 10%.
A fellow researcher fits a simple linear regression model Yi = α + βXi + ui by least squares, but has doubts that the first least squares assumption E(ui |Xi) = 0 is correct for her data set.
Can you tell me what are the advantages and limitations of applying nonparametric tests in solving business problems?
With a sample standard deviation of 33 miles. At the 0.05 level of significance is there a difference in the mean number of miles traveled between the two groups?
Find out the mean sum of squares of the treatment in one way ANOVA.The profits of individual traders in three departments, labelled by A, B and C, in a medium sized firm were recorded on one day.
What type of sampling was this study? What is your analysis of this approach? What are the advantages and disadvantages of this approach.
Temperature in a certain city for the month of June follows a uniform distribution over the interval 61º F to 91º F. What is the probability that a randomly selected June day has a temperature that exceeds 70º F?
Given the following raw scores, calculate the following values: Range, Variance and Standard Deviation, show your calculations: Scores: 9, 7, 8, 4, 8, 8,7, 8, 9, 6, 3
Pretend you are in charge of a packaging equipment company that is filling boxes of cereal. From past experience we know the population's mean weight of the filled boxes is 300 grams (and we know the distribution of grams is approximately normal).
During a meeting, one hospital administrator indicated that 70% of the geriatric patients are males. What is the sample proportion of male patients?
To market a new white wine, a winemaker decides to use two different advertising agencies one operating in the East and one in the West. After the white wine has been on the market for 8 months, independent random samples of wine drinkers are take..
T-scores are used on some psychological tests, such as the MMPI. T-scores have a mean of 50 and a standard deviation of 10, and therefore a z-score of -1 (one standard deviation below the mean) would be converted to a T-score of 40.
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