Math 132 final exam grade is normally distributed with mean 68 and standard deviation 23
Math 132 final exam grade is normally distributed with mean 68 and standard deviation 23. Final exam score above 92 corresponds to an A. Approximately what percent of the class got an A?
85% 15% 16% 84%
Homework Answers
Add Answer to:
Math 132 final exam grade is normally distributed with mean 68 and standard deviation 23
1.) The scores for the final exam in Math 2250 is normally distributed with a mean...
1.) The scores for the final exam in Math 2250 is normally distributed with a mean of 60 and standard deviation of 15. Given that 120 students wrote the final exam, i.) State and test the hypothesis that the mean score is greater than 65 at a 10% level of significance. Include a p-value in your answer. 141 ii.) Construct and interpret 90% confidence level for the mean score. [3] Using the same level of significance, determine how many students...
The scores on a psychology exam were normally distributed with mean of 55 and a standard...
The scores on a psychology exam were normally distributed with mean of 55 and a standard deviation of 5. A failing grade on the exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed? The cutoff for a failing score was 45. (Simplify your answer.) Approximately percent of the students failed. (Round to one decimal place as needed.)
1. The grade of a Math Quiz is normally distributed with its mean, 81 and standard...
1. The grade of a Math Quiz is normally distributed with its mean, 81 and standard deviation, 8.4. If a student is randomly selected in class, what is the probability that his or her score will be higher than 90? 2. The historical data of a company's annual sales is normally distributed with its mean, $330 million and its standard deviation, $45 million. Find the probability that the company's sales will be between $300 million and $ 400 next year?
A final exam in Math 160 has a mean of 73 with standard deviation 7.73
A final exam in Math 160 has a mean of 73 with standard deviation 7.73. Assume that a random sample of 24 students is selected and the test score of the sample is computed. Assuming the scores are normally distributed, what percentage of sample means are less than 69?
The scores on a psychology exam were normally distributed with a mean of 58 and a...
The scores on a psychology exam were normally distributed with a mean of 58 and a standard deviation of 6. A failing grade on the exam was anything 2 or more standard deviation below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed? The cutoff for a failing score was ____ Simplify answer) Approximately ___ percent of the students failed ( Round to one decimal place as needed)
Exam grades: Scores on a statistics final in a large class were normally distributed with a...
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 70 and a standard deviation of 11. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least four decimal places. (a) What proportion of the scores were above 85? (b) What proportion of the scores were below 55? (c) What is the probability that a randomly chosen score is between 60 and 80? Part: 0/3 Part 1...
The scores on a psychology exam were normally distributed with a mean of 62 and a...
The scores on a psychology exam were normally distributed with a mean of 62 and a standard deviation of 9. A failing grade on the exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed? The cutoff for a failing score was 44. (Simplify your answer.) Approximately percent of the students failed. (Round to one decimal place as needed.)
The mean and standard deviation of SAT math exam scores were 527 and 120, respectively, in...
The mean and standard deviation of SAT math exam scores were 527 and 120, respectively, in 2017. Assume that the scores are normally distributed and answer the following questions. a. Find the 30th percentile. b. If your score is 700, what percentage of the students got higher scores than you in 2017? c. What percentage of students got SAT math scores from 400 to 600? d. If your score is 650, what is the percentile of your score?
The final exam scores in a statistics class were normally distributed with a mean of 70...
The final exam scores in a statistics class were normally distributed with a mean of 70 and a standard deviation of 2. If you select a student at random, what is the probability that he scored between a 66 and a 74? A.2.5% B.50% C. 68% C. 95% D. none of the above
The scores on a psychology exam were normally distributed with a mean of 57 and a...
The scores on a psychology exam were normally distributed with a mean of 57 and a standard deviation of 8. A failing grade on the exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed? The cutoff for a failing score was______? (Simplify your answer)
1.) The scores for the final exam in Math 2250 is normally distributed with a mean of 60 and standard deviation of 15. Given that 120 students wrote the final exam, i.) State and test the hypothesis that the mean score is greater than 65 at a 10% level of significance. Include a p-value in your answer. 141 ii.) Construct and interpret 90% confidence level for the mean score. [3] Using the same level of significance, determine how many students...
The scores on a psychology exam were normally distributed with mean of 55 and a standard deviation of 5. A failing grade on the exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed? The cutoff for a failing score was 45. (Simplify your answer.) Approximately percent of the students failed. (Round to one decimal place as needed.)
1. The grade of a Math Quiz is normally distributed with its mean, 81 and standard deviation, 8.4. If a student is randomly selected in class, what is the probability that his or her score will be higher than 90? 2. The historical data of a company's annual sales is normally distributed with its mean, $330 million and its standard deviation, $45 million. Find the probability that the company's sales will be between $300 million and $ 400 next year?
Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 70 and a standard deviation of 11. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least four decimal places. (a) What proportion of the scores were above 85? (b) What proportion of the scores were below 55? (c) What is the probability that a randomly chosen score is between 60 and 80? Part: 0/3 Part 1...
The scores on a psychology exam were normally distributed with a mean of 62 and a standard deviation of 9. A failing grade on the exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed? The cutoff for a failing score was 44. (Simplify your answer.) Approximately percent of the students failed. (Round to one decimal place as needed.)
Most questions answered within 3 hours.
-
4. Without doing any calculations, predict whether the observed
∆T would increase, decrease or remain the...
asked 43 minutes ago -
Based on the range, which of the following sets of scores has
the greatest variability? 3,...
asked 1 hour ago -
Ripples in a pond travel at a velocity of 3 m/s with one peak
passing a...
asked 1 hour ago -
A man stands on the roof of a building of height 13.0 mm and
throws a...
asked 1 hour ago -
The extent to which assets are financed by borrowed funds and
other liabilities is indicated by:...
asked 2 hours ago -
Explain in detail
Germany is the fifth largest economy
explain what goods and services Germany specializes...
asked 3 hours ago -
The density of platinum is 21.45 g/mL. If a cube of platinum
with a mass of...
asked 3 hours ago -
Accounts Receivable
Sales
A/R Posting
Extended Sales Invoice
Packing Slip
Compare invoice to packing slip 2...
asked 3 hours ago -
Michaella, age 23, is a full-time law student and is claimed by
her parents as a...
asked 3 hours ago -
Why are polymers not typically casted into products?
asked 3 hours ago -
When rolling a die 129 times, what is the probability of rolling
a 6 no more...
asked 3 hours ago -
4. A call option currently sells for $7.75. It has a strike
price of $85 and...
asked 3 hours ago