Question

A study found that the mean amount of time cars spent in drive-throughs of a certain fast-food restaurant was 130.9 seconds. Assuming drive-through times are normally distributed with a standard deviation of 32 seconds, complete parts (a) through (d) below. Determine whether the variable is qualitative or quantitative. Distance in miles to nearest school (a) What is the probability that a randomly selected car will get through the restaurant's drive-through in less than 87 seconds? The probability that a randomly selected car will get through the restaurant's drive-through in less than 87 seconds is (Round to four decimal places as needed.) (b) What is the probability that a randomly selected car will spend more than 186 seconds in the restaurant's drive-through? The probability that a randomly selected car will spend more than 186 seconds in the restaurant's drive-through is (Round to four decimal places as needed.) (c) What proportion of cars spend between 2 and 3 minutes in the restaurant's drive-through? The proportion of cars that spend between 2 and 3 minutes in the restaurant's drive-through is - - - - - (Round to four decimal places as needed.) (d) Would it be unusual for a car to spend more than 3 minutes in the restaurant's drive-through? Why? The probability that a car spends more than 3 minutes in the restaurant's drive-through is - - - - - - , so it (1)_ be unusual, since the probability is (2)_ than 0.05. (Round to four decimal places as needed.) (1) would / WOULD NOT (2) greater / less

          A study found that the mean amount of time cars spent in drive-throughs of a certain fast-food restaurant was 130.9 seconds. Assuming drive-through times are normally distributed with a standard deviation of 32 seconds, complete parts (a) through (d) below.

Determine whether the variable is qualitative or quantitative.
Distance in miles to nearest school

(a) What is the probability that a randomly selected car will get through the restaurant's drive-through in less than 87 seconds?
The probability that a randomly selected car will get through the restaurant's drive-through in less than 87 seconds is (Round to four decimal places as needed.)

(b) What is the probability that a randomly selected car will spend more than 186 seconds in the restaurant's drive-through? The probability that a randomly selected car will spend more than 186 seconds in the restaurant's drive-through is (Round to four decimal places as needed.)

(c) What proportion of cars spend between 2 and 3 minutes in the restaurant's drive-through?
The proportion of cars that spend between 2 and 3 minutes in the restaurant's drive-through is - - - - - (Round to four decimal places as needed.)

(d) Would it be unusual for a car to spend more than 3 minutes in the restaurant's drive-through? Why?
The probability that a car spends more than 3 minutes in the restaurant's drive-through is - - - - - - , so it (1)_____ be unusual, since the probability is (2)_____ than 0.05. (Round to four decimal places as needed.)

(1) would / WOULD NOT (2) greater / less

Added by Deborah S.

Question

Please give Ace some feedback