Find the percent of people’s IQs would expect to be over 80 based on the normal model.

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Answer 1

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Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 5, Problem 10E

a.

To determine

Find the percent of people’s IQs would expect to be over 80 based on the normal model.

b.

To determine

Find the percent of people’s IQs would expect to be fewer than 90 based on the normal model.

c.

To determine

Find the percent of people’s IQs would expect to be between 112 and 132 based on the normal model.

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Given the following sample data values: 7, 12, 15, 9, 15, 13, 12, 10, 18,12 Find the following: a) Σ x= b) x² = c) x = n d) Median = e) Midrange x = (Enter a whole number) (Enter a whole number) (use one decimal place accuracy) (use one decimal place accuracy) (use one decimal place accuracy) f) the range= g) the variance, s² (Enter a whole number) f) Standard Deviation, s = (use one decimal place accuracy) Use the formula s² ·Σx² -(x)² n(n-1) nΣ x²-(x)² 2 Use the formula s = n(n-1) (use one decimal place accuracy)

Table of hours of television watched per week: 11 15 24 34 36 22 20 30 12 32 24 36 42 36 42 26 37 39 48 35 26 29 27 81276 40 54 47 KARKE 31 35 42 75 35 46 36 42 65 28 54 65 28 23 28 23669 34 43 35 36 16 19 19 28212 Using the data above, construct a frequency table according the following classes: Number of Hours Frequency Relative Frequency 10-19 20-29 |30-39 40-49 50-59 60-69 70-79 80-89 From the frequency table above, find a) the lower class limits b) the upper class limits c) the class width d) the class boundaries Statistics 300 Frequency Tables and Pictures of Data, page 2 Using your frequency table, construct a frequency and a relative frequency histogram labeling both axes.

Answer 2

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 5, Problem 10E

a.

To determine

Find the percent of people’s IQs would expect to be over 80 based on the normal model.

b.

To determine

Find the percent of people’s IQs would expect to be fewer than 90 based on the normal model.

c.

To determine

Find the percent of people’s IQs would expect to be between 112 and 132 based on the normal model.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 3

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 5, Problem 10E

a.

To determine

Find the percent of people’s IQs would expect to be over 80 based on the normal model.

b.

To determine

Find the percent of people’s IQs would expect to be fewer than 90 based on the normal model.

c.

To determine

Find the percent of people’s IQs would expect to be between 112 and 132 based on the normal model.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 5, Problem 10E

a.

To determine

Find the percent of people’s IQs would expect to be over 80 based on the normal model.

b.

To determine

Find the percent of people’s IQs would expect to be fewer than 90 based on the normal model.

c.

To determine

Find the percent of people’s IQs would expect to be between 112 and 132 based on the normal model.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 5

Chapter 5, Problem 10E

a.

To determine

Find the percent of people’s IQs would expect to be over 80 based on the normal model.

b.

To determine

Find the percent of people’s IQs would expect to be fewer than 90 based on the normal model.

c.

To determine

Find the percent of people’s IQs would expect to be between 112 and 132 based on the normal model.

Answer 6

Chapter 5, Problem 10E

a.

To determine

Find the percent of people’s IQs would expect to be over 80 based on the normal model.

Answer 7

Chapter 5, Problem 10E

a.

To determine

Find the percent of people’s IQs would expect to be over 80 based on the normal model.

Answer 8

b.

To determine

Find the percent of people’s IQs would expect to be fewer than 90 based on the normal model.

Answer 9

b.

To determine

Find the percent of people’s IQs would expect to be fewer than 90 based on the normal model.

Answer 10

c.

To determine

Find the percent of people’s IQs would expect to be between 112 and 132 based on the normal model.

Answer 11

c.

To determine

Find the percent of people’s IQs would expect to be between 112 and 132 based on the normal model.

Answer 12

Expert Solution & Answer

Answer 13

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Answer 14

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Answer 15

Ch. 5.1 - Your statistics teacher has announced that the...Ch. 5.2 - Prob. 2JC Ch. 5.2 - Prob. 3JC Ch. 5.3 - As a group, the Dutch are among the tallest people...Ch. 5.3 - Prob. 5JC Ch. 5 - Stats test The mean score on the Stats exam was 75...Ch. 5 - Prob. 2E Ch. 5 - Temperatures A towns January high temperatures...Ch. 5 - Placement exams An incoming freshman took her...Ch. 5 - Shipments A company selling clothing on the...

Find the percent of people’s IQs would expect to be over 80 based on the normal model.

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Find the percent of people’s IQs would expect to be over 80 based on the normal model.

Find the percent of people’s IQs would expect to be fewer than 90 based on the normal model.

Find the percent of people’s IQs would expect to be between 112 and 132 based on the normal model.

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