Homework Answers
Add Answer to:
Problem 3: Scores on an exam are assumed to be normally distributed with mean /u =...
10Q 8. Scores on an examination are assumed to be normally distributed with mean 68 and...
10Q 8. Scores on an examination are assumed to be normally distributed with mean 68 and variance 49 (a) What is the probability that a person taking the examination scores higher than 17 (b) What must be the cutoff point for passing the examination if the examiner wants only the lowest 25% of all scores to be passing?
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)
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)
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 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.)
Suppose that scores on a statistics exam are normally distributed with a mean of 77 and...
Suppose that scores on a statistics exam are normally distributed with a mean of 77 and a standard deviation of 4. Find the probability of a student scoring less than 80 on the exam using the following steps. (a) What region of the normal distribution are you looking to find the area of? (to the left of a zscore, to the right of a z-score, between two z-scores, or to the left of one z-score and to the right of...
7. Scores on a recent national Mathematics exam were normally distributed with a mean of 82...
7. Scores on a recent national Mathematics exam were normally distributed with a mean of 82 and a standard deviation of 7. A. What is the probability that a randomly selected exam score is less than 70 B. What is the probability that a randomly selected exam score is greater than 90? C. If the top 2.5% of test scores receive Merit awards, what is the lowest score necessary to receive a merit award?
A sample of final exam scores is normally distributed with a mean equal to 29 and...
A sample of final exam scores is normally distributed with a mean equal to 29 and a variance equal to 16. Part (a) What percentage of scores are between 25 and 33? (Round your answer to two decimal places.) Part (b) What raw score is the cutoff for the top 10% of scores? (Round your answer to one decimal place.) Part (c) What is the proportion below 23? (Round your answer to four decimal places.) Part (d) What is the...
A sample of final exam scores is normally distributed with a mean equal to 20 and...
A sample of final exam scores is normally distributed with a mean equal to 20 and a variance equal to 16. Part (a) What percentage of scores are between 16 and 24? (Round your answer to two decimal places.) % Part (b) What raw score is the cutoff for the top 10% of scores? (Round your answer to one decimal place.) Part (c) What is the proportion below 15? (Round your answer to four decimal places.) Part (d) What is...
A sample of final exam scores is normally distributed with a mean equal to 28 and...
A sample of final exam scores is normally distributed with a mean equal to 28 and a variance equal to 16. Part (a) What percentage of scores are between 24 and 32? (Round your answer to two decimal places.) Part (b) What raw score is the cutoff for the top 10% of scores? (Round your answer to one decimal place.) Part (c) What is the proportion below 23? (Round your answer to four decimal places.) Part (d) What is the...
10Q 8. Scores on an examination are assumed to be normally distributed with mean 68 and variance 49 (a) What is the probability that a person taking the examination scores higher than 17 (b) What must be the cutoff point for passing the examination if the examiner wants only the lowest 25% of all scores to be passing?
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 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.)
Most questions answered within 3 hours.
-
A χ2-curve, looking at the relationship between age and hours
spent working at an office per...
asked 31 seconds from now -
The pH of a sample of water from a river is 5.0. A
sample of effluent from...
asked 44 minutes ago -
At the beginning of the period, the Fabricating Department
budgeted direct labor of $136,500 and equipment...
asked 1 hour ago -
Please answer all
____ 28. Rent control is usually
justified on the grounds that it protects...
asked 1 hour ago -
PARTS A-D HAVE BEEN ANSWERED. WAS TOLD TO REPOST. ONLY ANSWER
PARTS E and F.
A...
asked 1 hour ago -
2) You are given the task of finding a representation for a
circle in a drawing...
asked 2 hours ago -
STUDY QUESTION: Does use of diet drug fen-phen
(fenfluramine-phentermine) cause valvular heart disease?
HINT: Valvular heart...
asked 2 hours ago -
1. An object weighing 40 N rests on a surface. The coefficient
of friction is 0.35....
asked 3 hours ago -
Investor company owns 35% of investee company voting stock and
accounts for the investment under the...
asked 4 hours ago -
The number of major faults on a randomly chosen 1 km stretch of
highway has a...
asked 5 hours ago -
Consider the competitive environment of Starbuck's, Progressive
Insurance, a manufacturing firm with low turnover, or a...
asked 6 hours ago -
3. Gains from trade
Consider two neighbouring island countries called Euphoria and
Contente. They each have...
asked 7 hours ago