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Question: Tastes in music:
Musical styles other than rock and pop are becoming more popular. A survey of college students finds that 40% like country music, 30% like gospel music, and 10% like both.
a) What is the conditional probability that a student likes gospel music if we know that he or she likes country music?
b) What is the conditional probability that a student who does not like country music likes gospel music? (A Venn diagram may help you.)
The breaking strengths of cables produced by a certain manufacturer have a standard deviation of 82 pounds. A random sample of 150 newly manufactured cables has a mean breaking strength of 1950 pounds.
A new cell phone battery is being considered as a replacement for the current one. Ten college student cell phone users are selected to try each battery in their usual mix of "talk" and "standby" and to record the number of hours until recharge wa..
With the sample standard deviation of 12 lbs. Determine the 90% confidence interval of true mean weight of all college wrestlers.
50 seconds and a standard deviation of 50 seconds. Find the probability that a randomly selected boy in secondary school can run the mile in less than 335 seconds.
select a company that u can visit in person or interviewon the telephone. call ahead to the company to arrange a time
In a poll of 553 voters in a certain city, 64% said the back a bill which would limit growth and development in their city. The margin of error in the poll was reported as 4 percentage points.
Formulate a linear program that can be used to determine the number of hours each graphic designer should be assigned to the project in order to minimize total cost. What is the total cost?
Here are data on attitudes toward coffee filters made of recycled paper. The data was gathered from a random sample. What is the conditional distribution of opinion about quality of recycled coffee filters for buyers?
A trader is designing his investment portfolio. He has prepared a list of potential companies in which to purchase stock. These include 5 companies in agriculture, 6 companies in manufacturing and 9 companies in the high-tech industry. The trade..
In other words, what other variables might you collect that you might plausibly expect to have an impact on the change in test scores aside from income and the curriculum type?
In a Gallup poll of 1,038 adults, 540 said that second-hand smoke is very harmful. What is the percentage of adults who said second-hand smoke is very harmful.
In order to test to see if there is any significant difference in the mean number of units produced per week by each of three production methods, the following data were collected:
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