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Taken from professors study guide
The lengths of time Al's commute are normally distributed with mean 36 minutes and standard deviation 4.5 minutes
a) On any given day what is the probability that als commute takes more than 40 minutes
b) For any 5 days what is the probability that the average commute time exceeds 40 min
c) 10% of al's commute take less than what time
How do you know if a value is a solution for an inequality? How is this different from determining if a value is a solution to an equation?
Complete the procedure on each of 36 occasions. Assuming we wich to be 99% certain of avoiding a Type I error, use these data to evaluate the union's claim.
a random sample of 100 credit sales in a department store showed an average sale of 120.00. from past data it is known
A researcher believes that if she uses a different text the students will score differently on the standardized test but she doesn't know what the difference is.
use the rule of 70 to find the approximate doubling time for a population whose annual growth rate is 0.7 u.s.? and
What control limits should be applied to his sample?
What is the probability that the condominium will sell at a price (i) below $200,000?, (ii) above $240,000?
Determine the sample proportion of P&G workers who participate in 401(k) accounts. Determine the sampling error if in reality P&G workers have the same proportion of participants in 401(k) accounts as does the rest of the nation.
What is the purpose for post tests? To determine how much difference exists between the treatments.
If the standard deviation remains at s = 0.02 inches, at what value should the supplier set the mean diameter of its large-cup lids so that only 1%.
Suppose that the proportion of statistics students who are sophomores is 20%. We take a random sample of 10 statistics students. Use the binomial formula to find the probability that the sample contains exactly 2 sophomores.
What was the capital sum of the money invested?
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