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A batch of 489 containers for frozen orange juice contains 11 that are defective. Two are selected, at random, without replacement from the batch. Round your answers to four decimal places.
a. What is the probability that the second one selected is defective given that the first one was defective?b. What is the probability that both are defective?c. What is the probability that both are acceptable?
The mean lifetime of electric light bulbs produced by a company has in the past been 1120 hours with a standard deviation of 125 hours. A sample of 20 bulbs revealed a standard deviation in the lifetimes of 150 hours.
Ms Moline is the budget director for Nexus Media Inc. She is comparing travel costs for sales and the audit staff. She collected the following sample data:
Find a 99% confidence interval for the population mean number of weekly miles.
Gerald takes the ACT Assessment mathematics test and scores 27. ACT math scores for 2007 were Normally distributed with mean 21.0 and standard deviation 5.1. What is Eleanor's standardized score?
A poll found that 38% of male voters and 46% of female voters support a particular candidate. To test whether this candidate has equal levels of support between male and female voters, the null hypothesis should be
Determine whether descriptive or inferential statistics have been used in the statement below:
In this group four were African American, 6 were hispanic, and one was Asian. Was this a good sample on which to norm this test? why or why not? What are your suggestions?
Show the sampling distribution of line over x where line over x is the sample mean annual cost of automobile insurance.
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
One of the 100 test subjects is selected at random. Given that the person selected approves of the mayor, what is the probability that they vote democrat?
Suppose you were preparing two-way tables of percentages for the following pairs of variables. How would you run the percentages?
The price of shares of Bank of Florida at the end of trading each day for the last year followed the normal distribution. Assume there were 240 trading days in the year.
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