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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). The population standard deviation is given as 24 grams. You are told to randomly select a sample of 144 boxes. You need to determine the probability that the sample of the 144 boxes will have a sample mean below 294. The probability will be between...
A. 0 and .010
B. .011 and .043
C. .044 and .150
D. .151 and .222
E. .223 and 1.0
A company is interested in estimating μ, mean number of days of sick leave taken by its employees. The firm's statistician randomly selects 100 personnel files and notes the number of sick days taken by each employee.
All else being equal, what occurs to your confidence interval when you increase value of alpha?
Write the linear regression equation to forecast father's education from mother's education?
Determine the relationships among data above? Analyze with charts/graphs/tables and a discussion.
Develop a 99% confidence interval for the population proportion.
Pick a random sample of 50 homes from the enclosed 90 cases. Double the asking price and selling price and use this data to develop three predictive models:
Start rolling dice until a particular number, say 3, is obtained, and keep track of how many rolls are necessary. Repeat 100 times. Then find the average.
In each of the following scenarios, which would be larger, the mean or median, or would the mean and median be about the same? Provide reasoning--think about the shape of the histogram for the data and how the shape would affect the relationship b..
If code is 4 random letters, and letters can be utilized multiple times, how many different possible codes are there?
Advertisers need to know which age groups are likely to see their ads. Purchasers of 120 copies of Cosmopolitan are shown by age group, (a) Make a bar chart and describe it. (b) Calculate expected frequencies for each class.
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.
Your friend tells you that the proportion of active Major League Baseball players who have a batting average greater than .300 is greater than 0.56, a claim you would like to test. The hypotheses for this test are Null Hypothesis: p ≤ 0.56, Altern..
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