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The number of passengers on the Carnival Sensation during one-week cruises in the Caribbean follows the normal distribution. The mean number of passengers per cruise is 1,820 and the standard deviation is 120.
1. What percent of the cruises will have between 1,820 and 1,970 passengers?
2. What percent of the cruises will have 1,970 passengers or more?
3. What percent of the cruises will have 1,600 or fewer passengers?
4. How many passengers are on the cruises with the fewest 25 percent of passengers?
According to Advertising Age, average base salary for women working as copywriters in advertising firms is higher than average base salary for men. The average base salary for women is $67,000 and the average base salary for men is $65,500 (Workin..
Below you are given a partial computer output based on a sample of 21 observations, relating an independent variable (x) and a dependent variable (y).
Use this information to construct a probability table, and then calculate each of the following probabilities:
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A researcher used stepwise regression to create regression models to predict Birth-Rate (births per1000) using five predictors:
Assume a one-tailed t -test is being applied to determine if population mean is less than $212. Level of significance chosen is 0.01 and 26 accounts are sampled. Determine the critical value?
Calculate the coefficient of skewness and coefficient of variation of minutes spent commuting. What do these statistics tell us?
Compute a 5-month moving average forecast for June through January.
A university found that 20 percent of its students withdraw without completing the introductory statistics. Assume that 20 students registered for the course.
he population consists of all 15 year olds living in the attendance district of a local high school. You plan to obtain a simple random sample of 200 such residents by using the roster of the high school as the sampling frame.
Draw a simulation experiment for car agency and simulate using fleet of four rental cars for 10 days.
The average number of hours of sleep per night that a college freshman gets is 6.50 with a standard deviation of 1.80 hours. If 35 college freshmen are randomly chosen find the probability that they average at least seven hours of sleep per night.
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