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In a batch of 8000 Clock radio 5% are defective. A sample of 14 clock radios is randomly selected without replacement from the 8000 and tested. The entire batch will be rejected if at least one of those tested is defective. What is the probability that the entire batch will be rejected? Assume independence.
Fast Service Store has maintained daily sales records on the various size 'Cool Drink' sales. These are shown in the following table:
A person purchases a package of 10 ball-point pens which, unknown to the purchaser, contains 4 defective pens. Of the first 2 pens used by the purchaser
Test the claim that the Snickers bars have a mean weight that is different than 20.1 grams. Because shutting down the plant is very expensive, test the claim at the .01 level of significance.
List the simple events in the sample for this experiment. Assuming that each pair of city council members has an equal chance of being selected, assign probabilities to each simple event.
The response variable is the change in cholesterol level after two months of treatment. An analysis of variance will be used to compare the three treatments. What null hypothesis is tested by this ANOVA F-test?
Let S be a random variable (not necessarily positive). Prove using Markov's inequality that for every p>0 and for every constant q,
Find the 95% confidence interval for the true population mean. Identify the point estimate for mean and margin of error.
Determine the rejection region for the test of Ho: (mean 1 - mean 2) > 2.43 Use a = 0.04. z >
A survey taken in a restaurant shows the following number of cups of coffee consumed with each meal. Construct an ungrouped frequency distribution.
A recent study stated that if a person chewed gum, the average number of sticks of gum he or she chewed daily was 8. To test the claim, a researcher selected a random sample of 36 gum chewers and found the mean number of sticks of gum chewed per d..
Chebyshev's Theorem states that the percentage of observations in a data set that should fall within five standard deviations of their mean is
To obtain the probability that the mean wage of 75 randomly selected workers will exceed $43,000
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