A data obtained from a random sample has mean 68 and standard deviation 35. The value whose Z-score is 0.64 Select one: O a. 45.6 O b. 68.64 Oc. 90.4

The amount of calories consumed by customers at the Chinese buffet is normally distributed with mean 2967 and standard deviation 539. One randomly selected customer is observed to see how many calories X that customer consumes. Round all answers to 4 decimal places where possible.b. Find the probability that the customer consumes less than 2600 calories. c. What proportion of the customers consume over 3342 calories? d. The Piggy award will given out to the 2% of customers who consume the most calories. What is the fewest number of calories a person must consume to receive the Piggy award?  calories. (Round to the nearest calorie)

Most people think that the​ "normal" adult body temperature is 98.6°F. In a more recent​ study, researchers reported that a more accurate figure may be 98.1°F. ​Furthermore, the standard deviation appeared to be around 0.7°F. Assume that a Normal model is appropriate.   b) What fraction of people would be expected to have body temperatures above 98.6°​F?

The graph of a normal curve is shown below. 49 + 57 μ = + 65 73 and o = + 81 + 89 Based on this graph, give the values of the mean and standard deviation of the distribution. 97

Assume the heights of faculty at Champlain College are normally distributed with a mean of 68.1 inchesand a standard deviation of 1.3 inches. Which of the following values best approximates the probabilityof randomly selecting a Champlain College faculty membershorterthan 67.5 inches tall?A. 0.0668B. 0.3228C. 0.5001D. 0.6772E. 0.9332

A population has a normal distribution with a mean of 32.9 and a standard deviation of 35.2. Draw 4. a normal curve with labels, shading, and what you entered into the calculator for full credit. Round your answer to 4 decimal places. Find the probability that a randomly selected item is between 27.5 and 40.6 a) Find the probability that a sample size of 25 is randomly selected and is less than 28.2. b)

Suppose that you have a four-sided die that is equally weighted (i.e. equal chance of any of the four sides landing face up). The four values on the die are [12.5968, 2, -2 and -12.5968] . What is the standard deviation using the conceptual definition? That is, what is the average distance from the data points to the mean?   A. 5.34   B. 4.09   C. 2.58   D. 7.29

only answer the first three (following bartleby's rules). Note:I will post another question, for you to answer me the remaining exercises, ok?

Suppose that the average number of Facebook friends users have is normally distributed with a mean of 112 and a standard deviation of about 48. Assume forty-six individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. 1. the group of 46, find the probability that the average number of friends is more than 123. 2. Find the first quartile for the average number of Facebook friends.