Question Help v A study found that the mean amount of time cars spent in drive-throughs of a certain fast-food restaurant was 147,1 seconds. Assuming drive-through times are normally distributed with a standard deviation of 34 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). The probability that a randomly selected car will get through the restaurant's drive-through in less than 95 seconds is 0.0630 (Round to four decimal places as needed.) (b) What is the probability that a randomly selected car will spend more than 205 seconds in the restaurant's drive-through? The probability that a randomly selected car will spend more than 205 seconds in the restaurant's drive-through is 0.0442. (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 0.6207. (Round to four decimal places as needed.) (d) Would it be unusual for a car to spend more than 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 be unusual, since the probability is V than 0.05. (Round to four decimal places as needed.)

Customers at a popular restaurant spend on average $32.30 per person. Assume that the amount spent follows approximately a normal distribution with a standard deviation of $5.25. What is the probability that a randomly selected customer will spend more than $40.00? • Below what cost do the 20% of customers paying the least spend?

Cardiovascular Disease, Pulmonary Disease The duration of cigarette smoking has been linked to many diseases, including lung cancer and various forms of heart disease. Suppose we know that among men ages 30-34 who have ever smoked, the mean number of years they smoked is 12.7 with a standard deviation of 5.2 years. For women in this age group, the mean number of years they smoked is 9.4 with a standard deviation of 3.1. (Assume that number of years spent smoking can be measured exactly and no continuity correction is necessary. Round your answers to four decimal places.) USE SALT (a) Assuming that the duration of smoking is normally distributed, what proportion of men in this age group have smoked for more than 21 years? (b) Assuming that the duration of smoking is normally distributed, what proportion of women in this age group have smoked for more than 21 years? Need Help? Read It

This is for statistics