Biology Forums - Study Force

During the 2013 Major League Baseball season, the St. Louis Cardinals averaged 41,602 fans per home game. Suppose attendance during the season follows the normal probability distribution with a standard deviation of 9,440 per game.
 
  What is the probability that a randomly selected game during the 2013 season had an attendance greater than 50,000 people?A) 0.0417
  B) 0.1867
  C) 0.3255
  D) 0.3986

Q. 2

A random sample of 2008 used cars for sale on the market has an average mileage of 71,420 miles with a sample standard deviation of 9,470 miles. The z-score for a used car with 80,500 miles in this sample is ________.
 
  A) -1.22
  B) 0
  C) 0.43
  D) 0.96

Q. 3

The value of  depends on the actual value of  or p.
 
  Indicate whether the statement is true or false

Q. 4

The sampling distribution for the difference in proportions is the result of subtracting one sampling distribution for the proportion from a second sampling distribution for the proportion.
 
  Indicate whether the statement is true or false

Q. 5

Costco installs automobile tires on a first-come first-serve basis.
 
  The total time a customer needs to wait for the installation to be completed follows the normal distribution with a mean time of 106.3 minutes and a standard deviation of 18.5 minutes. The interval around the mean that contains 68 of the wait time for customers is ________.
  A) 87.8, 124.8
  B) 69.3, 143.3
  C) 50.8, 161.8
  D) 32.3, 180.3

Q. 6

The  calculation is made under the premise that the null hypothesis is true and should rightfully be accepted.
 
  Indicate whether the statement is true or false

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