Given a frequency distribution of 10,000 scores which has a mean of 120 and a standard...
Given a frequency distribution of 10,000 scores which has a mean of 120 and a standard deviation of 15, 94.13% of those tested scored 135 or below.
T or F
The highway department conducted a study measuring driving speeds on a local section of the interstate highway. They found an average speed of mu=58 miles per hour with a standard deviation of 10. Given this information, what proportion of the cards are traveling between 55 and 65 miles per hour?
a .2580 or 25.80%
b .3759 or 37.59%
c .1179 or 11.79%
d none of these answers are correct
Given a frequency distribution of 10,000 scores, which approximates the normal curve and has a mean of 120 and a standard deviation of 15, what percentage of those tested scored 135 or below?
a.22%
b.84.13%
c.94%
d.15.87%
Homework Answers
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Given a frequency distribution of 10,000 scores which has a mean
of 120 and a standard...
Given a frequency distribution of 10,000 scores, which approximates the normal curve and has a mean...
Given a frequency distribution of 10,000 scores, which approximates the normal curve and has a mean of 120 and a standard deviation of 15, the top 80% had a what raw score or greater? a. 106 b. 94.34 c. 110 d. 107.4 The highway department conducted a study measuring driving speeds on a local section of interstate highway. They found an average speed of 58 miles per hour with a standard deviation of 10. Given this information, what proportion of...
Use the normal distribution of IQ scores, which has a mean of 105 and a standard...
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Use the normal distribution of IQ scores, which has a mean of 125 and a standard...
Use the normal distribution of IQ scores, which has a mean of 125 and a standard deviation of 13, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. :: Click the icon to view the table. %. Percentage of scores greater than 99 is (Round to two decimal places as needed.) i Data Table Standard Scores and Percentiles for a Normal Distribution Full data set e Standard score % Standard...
Use the normal distribution of IQ scores, which has a mean of 125 and a standard...
Use the normal distribution of IQ scores, which has a mean of 125 and a standard deviation of 11,and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. Percentage of scores greater than 152.5 is ___ % Standard score Percent -3 0.13 -2.5 0.62 -2 2.28 -1.5 6.68 -1 15.87 -0.9 18.41 -0.5 30.85 -0.1 46.02 0 50 0.1 53.98 0.5 69.15 0.9 81.59 1 84.13 1.5 93.32 2 97.72 2.5...
Use the normal distribution of IQ scores, which has a mean of 85 and a standard...
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Given a distribution of scores with a mean of 40 and a standard deviation of 6,...
Given a distribution of scores with a mean of 40 and a standard deviation of 6, convert the following scores to the standard scores indicated: a) X = 42 to a GRE score (a standard score with a mean of 500 and a standard deviation of 100) b) X = 29 to an IQ score (a standard score with a mean of 100 and a standard deviation of 15)
Use the normal distribution of IQ scores, which has a mean of 105 and a standard...
Use the normal distribution of IQ scores, which has a mean of 105 and a standard deviation of 17, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. Click the icon to view the table. Percentage of scores less than 139 is %. (Round to two decimal places as needed.)
QUESTION 1 Find the standard deviation of the data summarized in the given frequency distribution. A...
QUESTION 1 Find the standard deviation of the data summarized in the given frequency distribution. A company had 80 employees whose salaries are summarized in the frequency distribution below. Find the standard deviation. Salary |Emplovees 5,001-10,000 10,001 15,000 15,001-20,000 20,001- 25,000 25001 30,000 O s 8034.5 O s 7439.4 14 13 17 18 O s 7811.3 O s 8257.7
A set of 490 examination scores exhibiting a bell-shaped relative frequency distribution has a mean of...
A set of 490 examination scores exhibiting a bell-shaped relative frequency distribution has a mean of y = 75 and a standard deviation of s = 8. Approximately how many of the scores would you expect to fall in the interval from 67 to 83? (Round your answer to the nearest whole number.) scores Approximately how many of the scores would you expect to fall in the interval from 59 to 91? (Round your answer to the nearest whole number.)...
Calculate the sample standard deviation and sample variance for the following frequency distribution of final exam scores in a statistics class. If necessary, round to one more decimal place than the largest number of decimal places given in the data. Fi
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Use the normal distribution of IQ scores, which has a mean of 125 and a standard deviation of 13, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. :: Click the icon to view the table. %. Percentage of scores greater than 99 is (Round to two decimal places as needed.) i Data Table Standard Scores and Percentiles for a Normal Distribution Full data set e Standard score % Standard...
Use the normal distribution of IQ scores, which has a mean of 105 and a standard deviation of 17, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. Click the icon to view the table. Percentage of scores less than 139 is %. (Round to two decimal places as needed.)
QUESTION 1 Find the standard deviation of the data summarized in the given frequency distribution. A company had 80 employees whose salaries are summarized in the frequency distribution below. Find the standard deviation. Salary |Emplovees 5,001-10,000 10,001 15,000 15,001-20,000 20,001- 25,000 25001 30,000 O s 8034.5 O s 7439.4 14 13 17 18 O s 7811.3 O s 8257.7
A set of 490 examination scores exhibiting a bell-shaped relative frequency distribution has a mean of y = 75 and a standard deviation of s = 8. Approximately how many of the scores would you expect to fall in the interval from 67 to 83? (Round your answer to the nearest whole number.) scores Approximately how many of the scores would you expect to fall in the interval from 59 to 91? (Round your answer to the nearest whole number.)...
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