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The mean starting salary for college graduates in the spring of 2000 was$31,280. Assume that the distribution of starting salaries follows the normal distribution with a standard deviation of 3,330. That percent of the graduates have starting salaries:
1) Between 30000 and 35000.
2) More than 40000
Determine the probability of receiving at most three calls in a five-minute interval of time. Determine the probability of receiving exactly 10 calls in 15 minutes.
A survey is being planned to determine the mean amount of time corporation executives watch television. A pilot survey indicated that the mean time per week is 20 hours, with a standard deviation of 5.5 hours
Micron Electronics makes both desktop and laptop personal computers that they sell directly to customers by phone or over the Internet.
It is impossible to obtain a standard error less than 2 for any sized sample.
Polls showed the two main candidates in the 2004 presidential election were nearly tied on the day before the election. To predict the winner a newspaper would like to have a poll that has margin of error less than 1%. Roughly how large a sample w..
Given that a respondent is over age 50, what is the probability that he or she gets news primarily from newspapers?
What is the difference between a descriptive model that is developed using multiple regression analysis with time-series data and a model that is considered predictive?
The speed with which utility companies can resolve problems is very important. GTC, the Georgetown Telephone Company, reports they can resolve customer problems the same day they are reported in 70 percent of the cases.
Determine the probability that a randomly selected teacher earns more than $525 per week?
The singer has the following variety of songs, in no particular order: 7 relationship songs, 6 songs about people, 4 reflective songs, and 4 songs about places.
A savings account was opened for a baby on 1985 with a $100 deposit. No withdrawals or deposits occurred since the account was opened. The current balance of the account is $246.47. Measured in dollars of the year in which the account was opened, how..
Estimating the individual score using normal distribution and find the minimum SAT score needed to be accepted?
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