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The average of chemical engineers is 39yrs with a standard deviation of 4rs. If an engineer firm employs 24 chemical engineers, find the probablilty that the average age of the group is greater than 40 years old.
Evidence that average family income in a community
When performing a 2-way ANOVA with replication you must first: A) Perform an interaction hypothesis test B) Take out the error because you ran replicates and error makes no sense with replicates
The American Automobile Association checks the prices of gasoline before many holiday weekends.
Do these results suggest that the racial makeup of the faculty members is different from that of the students? (Use the .05 significance level.)
phone calls arrive at the rate of 9 per 15 minutes. compute the following probability by using poisson distribution no
I tossed a coin 6 times and recorded the outcomes - H for heads and T for tails. The first set of tosses yielded HTHTTH and the second set of tosses yielded TTTHHH. Which set of tosses is more probable to happen? And why?
What is the probability that Susan passes on the first try? What is the probability that Susan first passes on the second try?
Give examples of how quadratic equations can be used to solve everyday problems.
martindate were tester which can compare two materials in sigle run, weights losses from seven runs. Examine these data by creating the 90% confidence interval for difference of means. Define your assumption.
the variance of a sample of 81 observations equals 64. the standard deviation of the sample equalschoose one answer.a.
Suppose the age of buyers were collected and the data follows the bell curve (a normal distribution). The buyers had an average age of 47 years and a standard deviation of 5.
Discuss why the independent t-test is called independent. What does this analysis have to do with variance within and between groups?
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