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Question 1: The Gallop Poll folks found that 27% of adult's surveyed (national survey) said that they had been in a tornado. How many adults would need to be surveyed to estimate the true proportion with a 95% confidence that is 5% wide?
Question 2: An old study of 1000 people in Phoenix found that 27 were obese. Find the 99% confidence interval of the population proportion of persons living in Phoenix who are obese.
Welcome a woman taking the initiative in asking for a date. What is the probability that seven (7) of the men say NO.
Calculate the value of a Rs. 5,000 (par value) bond paying interest at an annual coupon interest rate of 10% with 10 years maturity.
You decide to test a friend for ESP using a standard deck of 52 playing cards. Such a deck contains 13 spades, 13 hearts, 13 diamonds, and 13 clubs. You shuffle the deck, select a card at random, and ask your friend to tell you whether the card is a ..
computer response time is an important application of the gamma and exponential distributions. suppose that a study of
During a 52 week period, a company paid overtime wages for 18 weeks and hired temporary help for 9 weeks. During 5 weeks, the company paid overtime and hired temporary help
What is the point estimate of the number of pieces per package? Construct a 99% confidence interval to estimate the mean number of pieces per package for the population.
List all possible combinations of opinions that can be held by students A, B, and C. (Hint: There are eight possibilities.) Then give the probability of each of these outcomes. Note that they are not equally likely.
How to identify the subjects who are closest to the cutoff for the upper 2.5% and 5% of the scores and the lower 2.5% and 5% of the scores when looking at the z-scores?
A chocolate bar is considered underweight if it weighs less than 8.0 oz. What proportion of chocolate bars weighs less than 8.0 oz?
Electrical connectors manufactured by a supply company last an average of 18.2 months and follow a normal distribution with a standard deviation of 1.7 months.
If the population standard deviation is σ = 20 is the 6 point effect large enough to be statistically significant? Use the two - tailed test with α = .05
Estimate the probability that the next time you ride in a car, you will not be delayed because of some car crash blocking the road.
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