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1. A researcher studies the average distance that 130 people who are living in U.S. urban areas walk each week: What is the size of the sample? Identify the population.
2. Is the "average" calculated in #1 a descriptive statistic or an inferential statistic if it is used to describe the 130 people studied?
3. Referencing #1, how might you calculate the average distance walked in one week as a(n): (a) ordinal measure? (b) scale measure?
4. A study of the effects of skin tone (light, medium, and dark) on the severity of facial wrinkles in middle age might be of interest to cosmetic surgeons:
(a) what is the independent variable in this study?(b) what is the dependent variable in this study?(c) how many levels does the independent variable have?
At.01 level of significance, is proportion of seeds which germinate dependent on seed type?
Determine the critical path probability that project will be completed within?
Clark Heter is an industrial engineer at Lyons Products. He would like to conclude whether there are more units produced on the afternoon shift than on the day shift. A sample of 54 day-shift workers showed that the mean number of units produced w..
What would that evaluation be and what is the margin of error?
What reasons for complaints do you think the hotel should focus on if it wants to reduce the number of complaints? Describe.
RESEARCHERS at a university conducted experiments with poplar trees. Listed below are weights (kg) of poplar trees given no treatment and poplar trees treated with fertilizer and irrigation.
Suppose that a study based on a sample from a targeted population shows that people at a pizza restaurant are hungrier than people at a coffee shop. make an interference based on the results of the study.
What is the probability that two of absent students were girls.What is the probability that two of absent students were boys.
Show that someone will think that the claim has more than a fifty percent chance of being true if p > q / (1 + q). Explain.
Die with 4 sides {1, 2, 3, 4} is tossed 2 times. Let X equal maximum of two observations and let Y equal minimum. Determine joint pmf of X and Y, and correlation coefficient. Are X and Y independent?
On average a certain intersection results in 3 traffic accidents per month. What is the probability that for any given month at this intersection
Machine X test unit cost $3000 with beta=3 and theta=500, Machine Y test unit cost $2000 with beta=3 and theta=400. If the machines oil fixtures has life of 20 hrs, which machine goes to market first?
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