Question 3 of 4 (1 point) Twenty-nine automobiles were tested for fuel efficiency (in miles per...
Thirty-four automobiles were tested for fuel efficiency (in miles per gallon). The following frequency distribution was obtained. Find the variance and standard deviation. Round your answers to one decimal place. Class boundaries 7.5-12.5 12.5-17.5 17.5-22.5 22.5-27.5 27.5-32.5 Frequency 14 Download data Variance- Standard deviation =
5. Thirty automobiles were tested for fuel efficiency in miles per gallon. The following frequency distribution was obtained. Calculate the mean. Class Boundaries Frequency 7.5-12.5 12.5-17.5 17.5-22.5 225-275 27.5-32.5 a 552 b.20.33 c.610 d. 25
only the questions with ticks, that is question 13 and 14. Section 3-2 Measures of Central Tendency 111 Find the (a) mean, (b) median, (e) mode, and d) midrange for the distances of the home runs for obtained. (The data in this exercise will be used in Exercise 20 in Section 3-3.) and Sosa, using the data in Exercise 18 in Class boundaries Compare the means. Decide if the means are anproximately equal or if one of the players is...
Question 5 (1 point) Following are the fuel efficiency, in miles per gallon, for a sample of convertibles. Calculate the sample variance. 25, 18, 22, 20, 21 Write only a number as your answer. Round to one decimal place (for example 8.3) Your Answer:
Problem 1 (18 points) Suppose the distribution of fuel efficiency (miles per gallon (mpg) in highway driving) for a sample of cars has a mound-shaped and symmetric distribution with mean x =38 and standard deviation s = 10 points. Illustrate your answers with graphs. a. Calculate the percent of cars whose fuel efficiency is less than 48 mpg. b. Calculate the percent of scores that are between 28 and 68 mpg. c. Calculate the 16th percentile of the data.
A three-digit number is formed from nine numbers (1, 2, 3, 4, 5, 6, 7, 8 & 9). No number can be repeated. How many different three-digit numbers are possible if 1 and 2 will not be chosen together? Select one: a. 462 b. 672 c. 336 d. 210 A tire manufacturer claims that the average life of a certain grade of tire is 50,000 miles or more when used under normal driving conditions. A random sample of 20 tires...