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You take a sample of 22 year-old U.S. citizens, and ask how many foreign countries they have visited. You find that most have visited between 0 and 2 foreign countries, but about 5% of students have been to 10 or more foreign countries. Which measure of central tendency should be used to describe this data? Explain why (don't forget to discuss skewness)
Give a probability distribution for the following: In 1992, the Big 10 collegiate sports conference moved to have women compose at least 40% of its athletes within 5 years.
What are the chances of getting 15 days of rain during the next 30 days? What do you think about Joe's assumptions concerning the weather for the next 30 days?
It is believed that the range of hourly wages paid to auto mechanics in a large city is $9 (range approx. = 4sigma-squared). If we assume that hourly wages are approximately normally distributed,
The National Survey of Student Engagement found that 87% of students report that their peers at least "sometimes" copy information from the Internet in their papers without reporting the source.12 Assume that the sample size is 430,000.
When is it appropriate to use a t-test for independent means? What is meant by the term "independent groups"? Does the t-test for independent means require that certain assumptions are met? What is meant by the term "degrees of freedom"
For a candidate who guesses at all answers, find the mean and variance for the random variable X, the number of correct answers.
Richwood Products buys parts from Staple Brothers machining. The engineers at Richwood want to ensure that the parts purchased meet their company's standards.
Bernoulli, part 2. Can we use probability models based on Bernoulli trials to investigate the following situations? Explain. a) You are rolling 5 dice. How likely is it to get at least two 6's to win the game? b) You survey 500 potential customers to..
We expect the results of samples of size 320 to be more predictable (less variable) than the results of samples of size 20. That is "long-run regularity" showing itself.
Find the probability that this shuttle component functions successfully if n = 2. - Find the probability that this shuttle component functions successfully if n = 4.
What is the probability that all four color their hair?- What is the probability that exactly one of the four colors his hair?
A survey of the number of calls received by a sample of Southern Phone Company subscribers last week revealed the following information.
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