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A mason is contracted to build a patio retaining wall. Plans call for the base of the wall to be a row of 50 10-inch bricks, each separated by ½ inch thick mortar. Assume that the bricks used are randomly chosen from a population of bricks whose mean length is 10 inches and whose standard deviation is 1/32 inch. Also suppose that the mason, on the average, will make the mortar ½ inch thick, but the actual dimension varies from brick to brick, the standard deviation of the thickness being 1/16 inch. What is the standard deviation of L, the length of the first row of the wall?
Perform a posthoc test that is suitable if we assume that group 7 is a control group and that the other are different treatment groups and that we are only interested in finding significant treatments, not to compare them.
If you draw one ball from the urn what is the probability that it is blue or white?
Suppose that verbal scores on SAT exam have a normal distribution with a population mean 500 points and population standard deviation of 100.
1. What do discrete random variables describe? 2. Explain joint probability. 3. Explain conditional probability.
Find out the forecast value utilizing three month moving average method, weighted moving average method, exponential smoothing and regression methods.
Use the normal distribution to approximate the following probability: According to the most recent Davenport student profile, 47% of students have children under 17 living at home with them.
What is the probability that the cereal would be high fiber? In other words, what is P (high fiber)?
Explain the applications of statistics in your own field (Business Administration/Accounting) - Construct a stem and leaf display.
A random sample of 16 ages is drawn from the population, and we find the sample mean of these observations to be μ = 8.76
Probability values based on normal distribution - old exit exam followed a normal distribution
Also use the regression model to predict a student's average if he/she misses 4 classes.
The booster club has gotten several businesses and car dealers to donate gasoline and cars for the college students to use to make a maximum of 575 personal contacts daily during the fund-raising drive. The college student will donate a total of 2..
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