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A summer resort boast that 85% of its new visitors return the next five years. Use the normal approximation to the binomial to find the probability
A local bank reports that 80 percent of its customers maintain a checking account, 60 percent have a savings account, and 50 percent have both
A poll of 1,250 investors conducted, assume that 50% of the investors found the market less attractive to the prior years.
The probability of contracting the kissing disease is .23 when one is exposed to a certain provocative environment. Sixty people are so exposed.
The listed sample distances (in millimeters) were obtained by using a pupilometer to measure the distances between the pupils of adults
Trading Volume on the NYSE is heaviest during the first half hour (early morning) and last half hour (late afternoon) of the trading day
In an exam, the mean score is 70 and the variance is 16. What is the probability that a student's score will lie within the "54 to 86" range
Each salesperson at stiles compton is rated either below average, average, or above average with respect to sales ability.
A study of 200 grocery chains revealed these incomes after taxes.
In the military, everything works of numbers. Recruiting is a good example of a binomial distribution. I'll use NC Army National Guard for an example.
Suppose that the number of cars, X, that pass through a car wash between 4:00pm and 5:00pm on any sunny Friday has the following probability distribution:
The mean income of a group of sample observations is $500; the standard deviation is $40. According to Chebyshev's theorem, at least what percent of the income
The following examples are experiments and their associated random variables. In each case identify the values the random variable
Describe exactly what information is provided by a Z-score
A survey of magazine subscribers showed that 55.8% rented a car during the last 12 months for business reasons, 44% rented a car for personal reasons
Listed below is the percent increase in sales for the MG Corporation over the last 5 years. Determine the geometric mean percent increase in sales over
An investment broker at your brokerage house tells you that he has found a mutual fund that has beaten the S&P market index in 16 of the past 25 weeks
The monthly spending on food of a family of three in Puerto Rico for the year 2000 is estimated in an average of $420.00/month with a standard deviation
A set of data is at the nominal level of measurement and you want to obtain a representative data value. Mode is the most appropriate. Is this true?
Each year, the US Energy Department publishes an Annual Energy Review that includes the per capita consumption for each of the 50 states.
How many ways can 15 girls be chosen to form a baseball team (need 9 players)?
The decision to use z-scores or Student's t-scores depends first on the size of the sample.
The marketing department of a soft-drink company wishes to determine the maximum expected payoff from introducing a new crystal-clear drink.
Your firm is planning a new style of advertising and figures that the probability of increasing the number of customers is 0.63
A sample of 2,000 licensed drivers revealed the following number of speeding violations.