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The average annual salary in Pennsylvania was $24,393. Assume that the salaries were normally distributed for this group of wage earners, and the standard deviation for this group was $4,362. Using this information, please respond to the following questions.
Normal distribution has mean of 80 and standard deviation of 14. Find out the value above which 80 percent of values will occur.
A shock can cause the failure of component 1 alone with probability p, component 2 alone with probability q, both components with probability r, or have no effects with probability 1-p-q-r. Suppose no repairs are possible and the system fails when..
a sample of 36 receipts at the theater concession stand has a mean total of 18.927 with a standard deviation of 3.883.
Assume that cars are independent regarding to their paint quality. Each car has a 90% chance of passing the test. What is the probability that 3 of the next 6 cars will fail the test?
In a shipment of 56 vials, only 13 do not have hairline cracks. If you randomly select one vial from the shipment, what is the probability that it has a hairline crack?
from a random sample of 70 high school seniors the mean and standard deviation of the verbal scores in the sat are
Scenario 2: If the standard deviation is to remain at 0.05 ounces, what mean does the filling machine need to have to achieve this goal.
do you drink the recommended amount of water each day? most americans dont on average americans drink 5.5 eight-oz
let x bar 10000 be the fraction of heads in 10000 tosses. use chebyshevs inequality to bound pxbarn - 12 is greater
The Daytona Beach Tourism Commission is interested in the average amount of money a typical college student spends per day during Spring Break.
Using the empirical rule what percentage of adults is 25 - 45 has iq score bet 70 and 130.
If the random sample of 16 men does result in a mean score of 590 is there strong evidence to support the claim that the course is actually effective? why or why not?
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