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1. A small business owner is experiencing a high staff turnover and wants to design a study to investigate the problem. Please identify following elements of this research study.
a. Research problem
b. Research design
c. Hypothesis to be tested
d. Data collection methods
e. Unit of analysis
2. Sara scored 75 in a statistics exam. The group mean was 70 and the standard deviation of the scores was 5.
a. What percentile is Sara in?
b. What is the probability of randomly chosen student scoring at least 60?
Construct a frequency distribution that has 5 classes, and draw:
A multiple regression equation for list price of homes in certain community in USA is=170,000 -850 X 1 + 28,000 X 2 , where X 1 signifies age in years and X 2 signifies number of rooms.
Is there evidence of a difference in objection to sharing information among the organizational groupings? (use α = 0.05)
Bob gets tests grades of 86, 92, and 60 He gets an 90 on his final exam. Find the weighted mean if each tests counts for 20%, and the final exam counts for 40% of the final grade.
How many subsets of S contain either the number 6 or the number 15?
What can be done to remedy multicollinearity? Use ANOVA instead of Regression.
Can we conclude that the mean time for a game is less than 3.50 hours? Use the .05 significance level.
What is the null and alternative hypothesis? What is your final conclusion?
He (given that) the true proportion of perfect condition items is only 80% what is the probability that the lot will not be shipped?
Find out the probbility that exactly five arrive within two days?
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
If historical time series data is very limited, what type of forecasting approach would be useful.
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