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The following is based on the normal distribution of scores with mean equal to 90 and standard deviation equal to 3.5. Determine the probability of a score falling between a raw score of 84 and 96?
Determine percent of the garages take between 29 hours and 34 hours to erect? Determine percent of garages take 28.7 hours or less to erect?
In a random sample of 10 adults from a nearby county, the mean waste generated per person per day was 4.35 pounds and the standard deviation was 1.88 pounds.
Consumer Reports magazine tested paints. The table below shows the overall quality score and cost in dolllars per gallon. Test for a correlation. Based on these results, do you get better quality paint by paying more?
X1, X2, X3, ... Xn are n independent, identically distributed random variables with expectation of 5 and variance of 4 (E[Xi] = 5, Var (Xi) = 4) and n is large. Determine Var(Y)?
The following is sample information. Test the hypothesis at the .05 significance level that the treatment means are equal.
How large a sample is required to estimate the mean speed with a margin of error equal to 2 miles per hour with 90% confidence?
In case of fire, the probability that D1 operates correctly is 0.95 and the probabilty that D2 operates correctly is 0.92. Find the probability that the sprinkler system will come on.
Fast Service Truck Lines uses the Ford Super Duty F-750 exclusively. Management made a study of the maintenance costs and determined the number of miles traveled during the year followed the normal distribution. The mean of the distribution was 60..
Records also point to that interviewing committee of bank officers approves 85% of individuals they interview. Determine probability that Ann's loan request is approved.
A consumer electronics firm has developed a new type of remote control button that is designed to operate before becoming intermittent.
Plot the data on the same line and give your impression regarding any apparent differences between the two companies.
The casino game craps is based on rolling two dice. Here is the assignment of probabilities to the sum of numbers on the up face when two dice are rolled:
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