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Problem 1:
A dataset contains information on travel behavior of male and female workers of a small office. A total of 50 workers drive (27 males and 23 females) and 30 others use transit (14 males and 16 females). If we randomly choose one individual,
a. What is the probability that the individual is a driver?
b. What is the probability that the individual is male?c. What is the probability that it is a male driver? d. What is the probability that it is a female or a transit user?If we randomly pick two individuals, e. What is the probability that both are transit users?
Problem 2:
A long-term record for weather in a certain province shows that the annual precipitation has a mean of 39.67 inches and a standard deviation of 4.38 inches. If the annual precipitation amount has a normal distribution, what is the probability that next year the total precipitation will be:
a. more than 50.0 inches?b. between 42.0 and 48.0 inches?c. between 30.0 and 37.5 inches?d. more than 35.0 inches?e. less than 45.0 inches?f. less than 32.0 inches?
When the accountants for lose-a-digit Computer, Inc. had finished preparing their annual budget, they presented the final figures to the president, I.M. Smart.
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Construct a 98% prediction interval for the selling price of a 4l- year old house having 4500 square feet, 13 rooms, and an attached garage.
A random sample of size 25 is taken from a normal population having a mean of 80 and a standard deviation of 5. A second random sample of size 36 is taken from a different normal population having a mean of 75 and a standard deviation of 3.
If the standard deviation of the population is 9 hours, determine whether there has been a significant increase in battery life expectancy.
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What do we understand for measures of central tendency and what are some examples of measures of central tendency?
You are a realtor with a small business. You use a simple 2 variable linear regression analysis for quick first glance house price estimates using square footage of the house.
Welcome a woman taking the initiative in asking for a date. What is the probability that seven (7) of the men say NO.
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