The peak shopping time at home improvement store is between 8:00am-11:00 am on Saturday mornings. Management at the home improvement store randomly selected 35 customers last Saturday morning and decided to observe their shopping habits.
They recorded the number of items that each of the customers purchased as well as the total time the customers spent in the store. Identify the types of variables recorded by the home improvement store.
A) number of items - discrete; total time - continuous
B) number of items - continuous; total time - continuous
C) number of items - discrete; total time - discrete
D) number of items - continuous; total time - discrete
Q. 2One year, professional sports players salaries averaged 1.7 million with a standard deviation of 0.8 million. Suppose a sample of 100 major league players was taken.
Find the approximate probability that the average salary of the 100 players exceeded 1.1 million.
A) 0.2357 B) approximately 0 C) 0.7357 D) approximately 1
Q. 3When 485 junior college students were surveyed,195 said that they have previously owned a motorcycle. Find a point estimate for p, the population proportion of students who have previously owned a motorcycle.
A) 0.598 B) 0.672 C) 0.287 D) 0.402
Q. 4The average score of all golfers for a particular course has a mean of 67 and a standard deviation of 3. Suppose 36 golfers played the course today. Find the probability that the average score of the 36 golfers exceeded 68.
A) 0.3707 B) 0.1293 C) 0.4772 D) 0.0228
Q. 5A random number generator is set top generate integer random numbers between 1 and 10 inclusive following a uniform distribution. What is the probability of the random number generator generating a 7?
A) 0.7 B) 0.5 C) 0 D) 0.07
Q. 6The amount of corn chips dispensed into a 15-ounce bag by the dispensing machine has been identified as possessing a normal distribution with a mean of 15.5 ounces and a standard deviation of 0.1 ounce.
Suppose 100 bags of chips were randomly selected from this dispensing machine. Find the probability that the sample mean weight of these 100 bags exceeded 15.6 ounces.
A) 0.6915 B) approximately 0 C) 0.3085 D) 0.1915
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