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In a survey of 1000 eligible voters selected at random, it was found that 100 had a college degree. Additionally, it was found that 90% of those who had a college degree voted in the last presidential election, whereas 58% of the people who did not have a college degree voted in the last presidential election. Assuming that the poll is representative of all eligible voters, find the probability that an eligible voter selected at random will have the following characteristics. (Round your answers to three decimal places.)
(a) The voter had a college degree and voted in the last presidential election.
(b) The voter did not have a college degree and did not vote in the last presidential election.
(c) The voter voted in the last presidential election.
(d) The voter did not vote in the last presidential election.
Assuming the sample size of 40 can be considered as large, compute the confidence interval for a confidence level of 90%.
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
Assume that the smiling time of eight-week old babies, in seconds, follows a uniform distribution between 0 and 23 seconds, inclusive. This means that any smiling time from 0 to and including 23 seconds is equally likely.
Using the .05 significance level, can we conclude that there is a positive association between the two variables?
The world record time (in minutes) in the marathon is plotted versus the year in which the record was set for men and women separately. The plotting symbol o is used for men and x for women. The data include only records set between 1908 and 1988.
An advantage of the permutation test over the t test for a difference in means is that - distribution interval or a bootstrap percentile interval
What is the likelihood all four of the selected flights arrived within 15 minutes of the scheduled time?
Suppose the population standard deviations are not the same. At.05 significance level, is there a difference in mean waiting time?
Find the value of the standard normal random variable z, called z 0 such that:
What is the probability of a fatal accident over a lifetime?
Using part(a), explain to investor differences between distribution of performance figures for the 2 kinds of stock funds.
Show the graph of the probability density function for flight time.
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