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The United States Postal Service reports that 95 percent of first class mail within the same city is delivered within two days of the time of mailing. Six of the letters are randomly sent to different locations.
What is the probability that all six arrive within two days
What is the probability that exactly five arrive within two days
Find the mean number of letters that will arrive within two days
Compute the variance and standard deviation of the number that will arrive within two days.
Construct a scatterplot, find the value of the linear correlation coefficient r, and find the P- value using a= 0.05. Is there sufficient evidence to conclude that there is a linear correlation between systolic measurement and diastolic measuremen..
According to the Insurance Institute of America, a family of four spends between $400 and $3800 per year on all types of insurance. Suppose the money spent is uniformly distributed between these amounts.
Utilizing a binominal experiment, that is each trail can be reduced to two outcomes, construct a binomial distribution.
Discuss the factors which might cause variation in the weight of Tootsie Rolls during manufacture.
A random sample of 12 paired observations indicated a correlation of .32. Can we conclude that the correlation in the population is greater than zero? Use the .05 significance level.
A car manufacturer has redesigned the anti-theft device on one of its models to increase the time that it takes for a professional car thief to be able to steal the car.
Median can be a more suitable measure of central tendency than mean if distribution of data is extremely skewed.
Write down the name of 4 parts of the regression equation.
Woodco manufactures tables and chairs. Each table and chair must be made entirely out of oak or entirely out of pine. A total of 150 board feet of oak and 210 board feet of pine are available.
In the history class the mean score was 76 with standard deviation 3.
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the oth..
The 99% confidence interval estimate for a population variance when a sample standard deviation of 12 is obtained from a sample of 10 items is:
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