MATH10120 Midterm: Math10120F14 Fall2007 Exam 3
Document Summary
In a survey of 10 students, each was aked to count the number of keys they were carrying. Calculate the average number of keys carried by the students surveyed. (a) 2 (b) 2. 5 (c) 3 (d) 2. 1 (e) 21. A random variable x has the following probability distribution: k. Find the expected value of the random variable x. (a) 1 (b) 3 mr. drillit, the dentist of tooth acres, has determined from his records the probability distribution of the variable x = the number of llings he administers in a day. The probability distribution for the random variable x is given below. Find the area under the standard normal curve between z = 1. 5 and z = 3. 1. (a) 0. 5 (b) 0. 9990 (c) 0. 0658 (d) 0. 0010 (e) 0. 9332. 5 the amount of milk contained in a gallon container is normally distributed with mean 128. 2 ounces and standard deviation 0. 2 ounces.
