Not everyone pays the same price forthe same model of a car. The figureillustrates a normal distribution for theprices paid for a particular model of anew car. The mean is $18,000 and thestandard deviation is $2000.Use the 68-95-99.7 Rule to find thepercentage of buyers who paid less than$12,000.Number of Car Buyers99.7%-95%--68%1214 16 18 20 22 24Price of a Model of a New Car (Thousands)The percentage of buyers who paid less than $12,000 is %.

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A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Not everyone pays the same price for the same model of a car. The figure - 99.7%- - 95%- +68% illustrates a normal distribution for the prices paid for a particular model of a new car. The mean is $22,000 and the standard deviation is $2000. Use the 68-95-99.7 Rule to find what percentage of buyers paid between $18,000 and $22,000. 22 18 20 Price of a Model of a New Car (Thousands) 24 26 28 %. The percentage of buyers who paid between $18,000 and $22,000 is (Type an exact answer.) Number of Car Buyers
The sample mean amount of savings is $
Many college admissions want to know your class percentage in addition to your grades. The grades are normally distributed. A certain university insists that a student place in at the 90th percentile. if the mean is 79.45 and the standard deviation is 5.37, what is the 90th percentile? a.88.07 b.85.01 c.86.33 d.90
It is commonly believed that the mean body temperature of a healthy adult is 98.6° F. You are not entirely convinced. You believe that it is higher than 98.6° F. The temperatures for 12 randomly selected healthy adults are shown below. Assume that the distribution of the population is normal. 100.1, 96.8, 98.7, 100, 99.1, 98.3, 97.5, 100.9, 99.1, 100, 98.1, 100.1 What can be concluded at the a = 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? Ha: Select an answer Select an answer c. The test statistic O Question Help: (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) d. The p-value = e. The p-value is a f. Based on this, we should Select an answer the null hypothesis. g. Thus, the final conclusion is that ... There is sufficient evidence to conclude that the population mean body temperature for healthy adults is higher than 98.6° F. There is not sufficient…
The mean age of two people in a room is 20 years. A 50 year old person enters the room. What is the mean age of the 3 people in the room now 20 30 33.3 35 none of the above
Professors at a local university earn an average salary of $80,000 with a standard deviation of $6,000. The salary distribution is approximately bell-shaped. What can be said about the percentage of salaries that are less than $68,000 or more than $92,000? Multiple Choice It is about 5%. It is about 68%. It is about 95%. It is about 32%.
A distribution has mean 100 and standard deviation 3. What is the largest percent of the data that is guaranteed to be between 40 and 160 93.75 96 97.44 99.75 99.99
The top 16 winning scores for NFL games are listed below. Find the mean score. Video Tutorial: How to find the mean on a TI-84 72 54 52 54 70 51 56 58 58 52 51 63 51 48 52 61 A. 54 B. 57.1 C. 63.2 D. 56.4
The graph illustrates a normal distribution for the prices paid for a particular model of HD television. The mean price paid is $1600 and the standard deviation is $140.What is the approximate percentage of buyers who paid less than $1320? What is the approximate percentage of buyers who paid less than $1180?
The graph illustrates a normal distribution for the prices paid for a particular model of HD television. The mean price paid is $1600 and the standard deviation is $135.What is the approximate percentage of buyers who paid between $1600 and $2005?%What is the approximate percentage of buyers who paid less than $1330?%What is the approximate percentage of buyers who paid between $1465 and $1600? %
The table below summarizes the number of hours a sample of college students spent watching television in the past week. Hours Frequency 10 - 12 4 13 - 15 12 16 - 18 20 19 - 21 14 Find the standard deviation.
A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations is his height above the mean?

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