A study found that the mean amount of time cars spent in drive-throughs of a certain fast-food restaurant was 145.1 seconds. Assuming drive-through times are normally distributed with a standan deviation of 29 seconds, complete parts (a) through (d) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). CID (a) What is the probability that a randomly selected car will get through the restaurant's drive-through in less than 106 seconds? The probability that a randomly selected car will get through the restaurant's drive-through in less than 106 seconds is (Round to four decimal places as needed.)

In a recent​ poll, 45​% of survey respondents said​ that, if they only had one​ child, they would prefer the child to be a boy. Suppose you conducted a survey of 160 randomly selected students on your campus and find that 79 of them would prefer a boy. Complete parts​ (a) and​ (b) below.   Click here to view the standard normal distribution table (page 1). LOADING... Click here to view the standard normal distribution table (page 2). LOADING... ​(a) Use the normal approximation to the binomial to approximate the probability​ that, in a random sample of 160 ​students, at least 79 would prefer a​ boy, assuming the true percentage is 45​%.   The probability that at least 79 students would prefer a boy is 3636. ​(Round to four decimal places as​ needed.)

A flooring company sells carpet by the metre off of a standard sized roll. The mean amount of carpet sold per month is known to have a normal distribution. If the probability of selling more than 1,000 metres per month is 0.0668 and the standard deviation is 100 metres, what is the mean amount of carpet sold? 900 1100 1150 850 The amount of coffee poured into a large coffee cup at the campus Tim Horton's has a distribution that is skewed to the right with a mean of 600 ml and a standard deviation of 50 ml. For a random sample of 100 large cups poured, what is the mean of the sampling distribution? 50 600 100 50 √100

a mathematics assessment test has a mean score of 100 points with a standard deviation of 10 points. what does a person have to be in the top 2.5% of people who have completed the exam? (Assume a normal distribution).