Grade percentages for STAT 302 students can be described using a bell-curve distribution with a mean...
Grade percentages for STAT 302 students can be described using a bell-curve distribution with a mean of 82.7% and a standard deviation of 5.3%.
(a) Using the 68-95-99.7 rule, what percent of students have grade percentages that are at least 93.3%? How do you solve this? (correct answer is 2.5%)
(b) Using the 68-95-99.7 rule, about 50% of students have grade percentages less than what percent? How do you solve this? (correct answer is 82.7%)
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Grade percentages for STAT 302 students can be described using a
bell-curve distribution with a mean...
Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with...
Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.5 and a standard deviation of 0.37. Using the empirical rule, what percentage of the students have grade point! averages that are no more than 1.76? Please do not round your answer. Answer(How to Enter) 2 Points Keypad
Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with...
Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.56 and a standard deviation of 0.38. Using the empirical rule, what percentage of the students have grade point averages that are at least 1-422 Please do not round your answer Suppose that grade point averages of undergraduate students at one university have a bell shaped distribution with a mean of 2.61 and a standard deviation of 0.4 using the empirical...
Scores of 281 students on an exam were normally distributed with the mean 79 and the...
Scores of 281 students on an exam were normally distributed with the mean 79 and the standard deviation of 6. Using the "68-95-99.7" rule, estimate how many students score above 91 O 15 O 14 Not enough information to answer the question None of the given numerical values is correct 10
Scores of 239 students on an exam were normally distributed with the mean 79 and the...
Scores of 239 students on an exam were normally distributed with the mean 79 and the standard deviation of 6. Using the "68-95-99.7" rule, estimate how many students score above 91 9 Not enough information to answer the question 12 6 2 3 13 None of the given numerical values is correct
In a mid-size company, the distribution of the number of phone calls answered each day by...
In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 43 and a standard deviation of 7. Using the empirical (68-95-99.7) rule, what is the approximate percentage of daily phone calls numbering between 29 and 57. Enter your answer as a percent, but do not enter the percent symbol. do not enter in decimal form( for example, enter 93.8 for 93.8% not...
1. Assuming age fits a normal distribution (it definitely does not!) with your mean and standard deviation. Note: The answers will seem ridiculous! (a) Draw the normal curve with the usual l...
1. Assuming age fits a normal distribution (it definitely does not!) with your mean and standard deviation. Note: The answers will seem ridiculous! (a) Draw the normal curve with the usual labels for the 68-95-99.7 rule. (b) 68% of students are between what two ages? (c) 95% of students are between what two ages? (d) 99.7% of students are between what two ages? (e) 50% of students are older than what age? (f) 34% of students are between what two...
Fuel economy estimates for automobiles built one year predicted a mean of 26.8 mpg and a...
Fuel economy estimates for automobiles built one year predicted a mean of 26.8 mpg and a standard deviation of 5.2 mpg for highway driving. Assume that a Normal model can be applied. Use the 68-95-99.7 Rule to complete parts a) through e) a) Draw the model for auto fuel economy. ОА. OC A A A 14 21 b) In what interval would you expect the central 95% of autos to be found? Using the 88-95-99.7 rule, the central 95% of...
(1 point) The distribution of heights of adult men in the U.S. is approximately normal with mean 69 inches and standard deviation 2.5 inches Use what you know about a normal distribution and the...
(1 point) The distribution of heights of adult men in the U.S. is approximately normal with mean 69 inches and standard deviation 2.5 inches Use what you know about a normal distribution and the 68-95-99.7 rule to answer the following NOTE: If your answer is a percent, such as 25 percent, enter: "25 PERCENT" (without the quotes). If your answer is in inches, such as 10 inches, enter: "10 INCHES" (without the quotes and with a space between the number...
To estimate the mean height μμ of male students on your campus, you will measure an...
To estimate the mean height μμ of male students on your campus, you will measure an SRS of students. You know from government data that heights of young men are approximately Normal with standard deviation about 2.8 inches. You want your sample mean x⎯⎯⎯x¯ to estimate μμ with an error of no more than one-half inch in either direction. (a) What standard deviation must x⎯⎯⎯x¯ have so that 95% of all samples give an x⎯⎯⎯x¯ within one-half inch of μμ?...
Fuel economy estimates for automobiles built one year predicted a mean of 957 1/100km and a...
Fuel economy estimates for automobiles built one year predicted a mean of 957 1/100km and a standard deviation of 2.33/100km for highway driving Assume that a Normal model can be applied Use the 68-95-997 Rule to complete parts a through e below a) Draw the model for auto fuel economy OB OC. ОА. b) In what interval would you expect the contral 99.7% of autos to be found? Using the 68-85-007 Rule, the central 99.7% of autos can be expected...
Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.5 and a standard deviation of 0.37. Using the empirical rule, what percentage of the students have grade point! averages that are no more than 1.76? Please do not round your answer. Answer(How to Enter) 2 Points Keypad
Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.56 and a standard deviation of 0.38. Using the empirical rule, what percentage of the students have grade point averages that are at least 1-422 Please do not round your answer Suppose that grade point averages of undergraduate students at one university have a bell shaped distribution with a mean of 2.61 and a standard deviation of 0.4 using the empirical...
Scores of 281 students on an exam were normally distributed with the mean 79 and the standard deviation of 6. Using the "68-95-99.7" rule, estimate how many students score above 91 O 15 O 14 Not enough information to answer the question None of the given numerical values is correct 10
Scores of 239 students on an exam were normally distributed with the mean 79 and the standard deviation of 6. Using the "68-95-99.7" rule, estimate how many students score above 91 9 Not enough information to answer the question 12 6 2 3 13 None of the given numerical values is correct
1. Assuming age fits a normal distribution (it definitely does not!) with your mean and standard deviation. Note: The answers will seem ridiculous! (a) Draw the normal curve with the usual labels for the 68-95-99.7 rule. (b) 68% of students are between what two ages? (c) 95% of students are between what two ages? (d) 99.7% of students are between what two ages? (e) 50% of students are older than what age? (f) 34% of students are between what two...
Fuel economy estimates for automobiles built one year predicted a mean of 26.8 mpg and a standard deviation of 5.2 mpg for highway driving. Assume that a Normal model can be applied. Use the 68-95-99.7 Rule to complete parts a) through e) a) Draw the model for auto fuel economy. ОА. OC A A A 14 21 b) In what interval would you expect the central 95% of autos to be found? Using the 88-95-99.7 rule, the central 95% of...
(1 point) The distribution of heights of adult men in the U.S. is approximately normal with mean 69 inches and standard deviation 2.5 inches Use what you know about a normal distribution and the 68-95-99.7 rule to answer the following NOTE: If your answer is a percent, such as 25 percent, enter: "25 PERCENT" (without the quotes). If your answer is in inches, such as 10 inches, enter: "10 INCHES" (without the quotes and with a space between the number...
Fuel economy estimates for automobiles built one year predicted a mean of 957 1/100km and a standard deviation of 2.33/100km for highway driving Assume that a Normal model can be applied Use the 68-95-997 Rule to complete parts a through e below a) Draw the model for auto fuel economy OB OC. ОА. b) In what interval would you expect the contral 99.7% of autos to be found? Using the 68-85-007 Rule, the central 99.7% of autos can be expected...
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