Question

The average number of gallons of lemonade consumed by the football team during a game is 20. Assume the variable is normally distributed. The probability that between 15 and 25 gallons are consumed is .9044.

1. Find the standard deviation. Round to one decimal place

Find the probability that they will drink

1. Less than 19 gallons
2. Between 26 and 28 gallons

10.      

a.   Find z such that 34% of the area under the standard normal curve lies to the right of z.

b.   Find z such that 46% of the area under the standard normal curve lies to the left of z.

c.         Find z such that 68% of the area under the standard normal curve lies between z and –z.

11.       Fifty-three percent of U.S. households have a personal computer. In a random sample of 250 households,

1. Find µ ( round to one decimal place)

2. Find the variance     ( round to two decimal places.

3. Find the standard deviation (round to two decimal places)

13. The average GMAT s cores for the top-30 ranked graduate schools of business are listed here. Do a five-point summary. Check for outliers.

718      703      703      703      700      690      695      705      690      688

676      681      689      686      691      669      674      652      680      670

651      651      637      662      641      645      645      642      660      636

Answer 1