7. Scores on the Wechsler Adult Intelligence Scale (a standard IQ test) are approximatelynormally distributed within age groups. For the 20-34 age group, the mean is 110 and thestandard deviation is 25. For the 60-64 age groups, the mean is 90 and the standarddeviation is 25. Sarah is 29 and her mother is 62. Sarah scores 135 on the Wechsler test,while Ann scores 120. Who has the better score, relative to her age group?Answer:

Solution: Given information: Let X represent the Wechsler score for the age group 20-34 X~N(μx=…

Answered: Scores on the Wechsler Adult…

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...

See similar textbooks

Similar questions

Gabriel and Lucia took a road trip across the country. The room costs, in dollars, for their overnight stays are listed in the accompanying table. What does Chebyshev's theorem say about the number of the amounts that are within three standard deviations of the mean? Click the icon to view the room costs in dollars. There are at least observations that are within three standard deviations of the mean. (Round up to the nearest whole number.) Room Costs ($) 92 106 118 170 184 181 119 248 138 133 122 250 0 X
Neil scored 67 on his calculus class final and was devastated by his failing grade. His class distribution had a mean of 54 and a standard deviation of 7. Greg was quite proud of his score of 88 for his Spanish language class. His class distribution had a mean of 97 with a standard deviation of 6. Who did better relative to their class?
In a certain test in English, the mean score of a group of 200 students was 56 and the standard deviation was 12. In a test in chemistry, the mean was 68 and the standard deviation was 8. If a student scored 65 in English and 75 in chemistry, in which test did she perform better?
Mario's weekly poker winnings have a mean of $353 and a standard deviation of $67. Last week he won $185. How many standard deviations from the mean is that?
An incoming MBA student took placement exams in economics and mathematics. In economics, she scored 82 and in math 89. The overall results on the economics exam had a mean of 70 and a standard deviation of 7, while the mean math score was 69, with a standard deviation of 10. On which exam did she do better compared with the other students?
Use the range rule of thumb to identify the values that are significantly low, the values that are signficantly high, and the values that are neither significantly low nor significantly high. A test is used to assess readiness for college. In a recent year, the mean test score was 19.8 and the standard deviation was 5.4, Identify the test scores that are significantly low or significantly high. What test scores are significantly low? Select the correct answer below and fill in the answer box(es) to complete your choice. O A. Test scores that are between (Round to one decimal place as needed. Use ascending order.) and Get more help - Next all 9:26 PM 47°F Clear 3/27/2022 近
Ten year old girls, the Mean is 54.4, the standard deviation 2.7, 95 percentile in height. How tall is she.
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?
Todd just got back his exam grades in three classes. In biology the class mean was 75.80 with a standard deviation of 5.15, Todd got an 84.00. In political science the class mean was 84.00 with a standard deviation of 5.50, Todd got an 84.00. In economics the class mean was 87.50 with a standard deviation of 5.60, Todd got a 84.00. 4. Which class showed the highest variability in scores? 5. Which class showed the lowest variability in scores? 6. Which class had the highest average test score?
A person scores 81 on a test of verbal ability and 6.4 on a test of quantitative ability. For the verbal ability test, the mean for people in general is 50 and the standard deviation is 20. For the quantitative ability test, the mean for people in general is 0 and the standard deviation is 5. Which is this person’s stronger ability: verbal or quantitative? Explain your answer to a person who has never had a course in statistics.
In ABC High School, the mean IQ test score of the first year students is 102 and the standard deviation is 12. What is the z-score of a student whose IQ test score is 106?
An incoming freshman took her college's placement test in French and she scored 82 points. The overall results on the French test had a mean of 72 and a standard deviation of 8. Scores were normally distributed. Find the percentage of the students who scored higher than 82 points using your normal table. Write your answer without the % sign as a numerical value, for example write 52.7 for 52.7%.

SEE MORE QUESTIONS

Recommended textbooks for you

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

SEE MORE TEXTBOOKS