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Travel and Transportation In a particularly rural area in upstate New York, 80% of all people use chains on their car tires (for winter driving), 60% carry a snow shovel in their car and use chains, and 15% carry a shovel but do not use chains. Suppose a person from this area is selected at random.
a. If the person uses chains, what is the probability that he carries a shovel? Write a Solution Trail for this problem.
b. Given that the person does not use chains, what is the probability that she carries a shovel?
a statistics professor works tirelessly to catch students cheating on his exams. he has particular routes for his
1. The data below are the colors of cars that came through the Starbuck's drive-thru between 9am and 10am on a particular day.
In the Unit 4 Discussion you were asked to create a research question and then convert that question into a null hypothesis and alternative hypothesis. You also determined if your alternative is one-tailed or two-tailed. Finally, you predicted the..
Suppose the population standard deviation is 0.3 minutes and the sample mean is 9.975. Find the sample mean and compute. A 90-percent confidence interval for the true mean delivery time, is?
A researcher conducted a study in which children with problems learning mathematics were offered the opportunity to purchase time with special tutors.- List three problems with that interpretation and explain why each is a problem.
Are A and B independent events? Explain how you know.- Are A and B complementary events? Explain how you know.
Determine the station speed of the company's assembly line assuming that it is set for the operator whose pace is 85% of average (Z value for 85% or 15%=1.04 or, -1.04).
Qoestion 1: A researcher is interested in the effects of gender on alcohol use. What is the independent variable(s)? Question 2: A researcher is interested in the effects of gender on alcohol use. What is the dependent variable(s)?
the cholesterol found in eggs is normally distributed with a mean of 200 mg. and a standard deviation of 8 mg. if an
Given that 200 people were aged between 25 and 40, approximately how many had a systolic blood pressure reading between 130 and 149 inclusive?
Use this information to find the upper and lower limits of the first class if you wish to construct a frequency distribution with 10 classes.
Test the data for normality. If the data are not normal, try a suitable transformation to make the transformed data approximately normal.
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