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For an exam given to a class, the students' score ranged from 30 to 90, with...
In class A, the mean score on a math exam was 85. In class B, the...
In class A, the mean score on a math exam was 85. In class B, the mean score on the same test was 75. There were 30 students in each class. The scores in class A ranged from 83 through 87, whereas the score. in class B ranged from 45 through 100. Which of the following is an appropriate conclusion that can be drawn from the information given above? res The standard deviation of scores was higher in class B....
One college class had a total of 90 students. The average score for the class on...
One college class had a total of 90 students. The average score for the class on the last exam was 86.3 with a standard deviation of 4.4. A random sample of 39 students was selected. a. Calculate the standard error of the mean. b. What is the probability that the sample mean will be less than 88? c. What is the probability that the sample mean will be more than 87? d. What is the probability that the sample mean...
Example: In a class of 3 students, the average score on the final exam is 75%...
Example: In a class of 3 students, the average score on the final exam is 75% and standard deviation of 5%. Amy got 80% on the final exam. How many standard deviations better than the mean is that? Mandy got 70%. How many standard deviations is Mandy's score deviate from the mean? Judy got 75%. How many standard deviation is Judy's score deviate from the mean?
please help me do this Final exam scores in a Math class with large number of...
please help me do this
Final exam scores in a Math class with large number of students have mean 151 and standard deviation 4.1. Provided the scores of this Final exam have a nearly symmetric/bell-curve distribution, what percent of students score below 142.8 OR above 146.9 cal Enter a Points possible: 5 Unlimited attempts. Score on last attempt: 0. Score in gradebook: 0 Message instructor about this question more License
In your bid to be elected class representative, you have your election committee survey five randomly...
In your bid to be elected class representative, you have your election committee survey five randomly chosen students in your class and ask them to rank you on a scale of 0-10. Your rankings are 1, 2, 4, 0, 8. (a) Find the sample mean and standard deviation. (Round your answers to two decimal places.) HINT [See Example 1.] sample mean standard deviation (b) Assuming the sample mean and the standard deviation is indicative of the class as a whole,...
A z score of 1.25 represents an observation that is a) 1.25 standard deviation below the...
A z score of 1.25 represents an observation that is a) 1.25 standard deviation below the mean. b) 0.25 standard deviations above the mean of 1. c) 1.25 standard deviations above the mean. d) both b and c Assume that your class took an exam last week and the mean and standard deviation of the exam were 85 and 5, respectively. Your instructor told you that 30 percent of the students had a score of 90 or above. You would...
the test scores ranged from 30 to 80 ) As a rule of thumb, the entire...
the
test scores ranged from 30 to 80
) As a rule of thumb, the entire range of a data large data set is approximately 4 to 6 standard deviations. Estimate the range of the standard deviation for the exam scores, using this information and the information in this problem. (Round your answers to two decimal places, if necessary.)
rk (Copy) Score: 0.5 of 1 pt 23 of 35 (21 complete) 2.4.7 Discuss the similarities...
rk (Copy) Score: 0.5 of 1 pt 23 of 35 (21 complete) 2.4.7 Discuss the similarities and the differences between the Empirical Rule and Chebychev's Theorem What is a similarity between the Empirical Rule and Chebychev's Theorem? A. Both do not require the data to have a sample standard deviation. B. Both estimate proportions of the data contained within k standard deviations of the mean. C. Both calculate the variance and standard deviation of a sample. O D. Both apply...
The boxplot of the exam scores for the students in an introductory statistics course is given...
The boxplot of the exam scores for the students in an introductory statistics course is given below. The distribution of the scores is 30 40 50 60 70 Score 80 90 100 Symmetric and bell-shaped Positively skewed O negatively skewed Symmetric but not bell-shaped A Ph.D. graduate has applied for a job with two universities: A and B. The graduate feels that she has a 60% chance of receiving an offer from university A and a 50% chance of receiving...
Scores on an accounting exam ranged from 41 to 95, with quartiles Q1 = 50.25, Q2...
Scores on an accounting exam ranged from 41 to 95, with
quartiles Q1 = 50.25, Q2 = 58.5, Q3 = 81.50. (a) Select the correct
box plot for the given data.
(a) Select the correct box plot for the given
data.
BoxPlot A
BoxPlot B
BoxPlot C
A B C
(b) Describe its shape (skewed left, symmetric,
skewed right).
The distribution is symmetric.
The distribution is skewed left.
The distribution is skewed right.
- BoxPlot BoxPlot 40 50...
In class A, the mean score on a math exam was 85. In class B, the mean score on the same test was 75. There were 30 students in each class. The scores in class A ranged from 83 through 87, whereas the score. in class B ranged from 45 through 100. Which of the following is an appropriate conclusion that can be drawn from the information given above? res The standard deviation of scores was higher in class B....
Example: In a class of 3 students, the average score on the final exam is 75% and standard deviation of 5%. Amy got 80% on the final exam. How many standard deviations better than the mean is that? Mandy got 70%. How many standard deviations is Mandy's score deviate from the mean? Judy got 75%. How many standard deviation is Judy's score deviate from the mean?
please help me do this
Final exam scores in a Math class with large number of students have mean 151 and standard deviation 4.1. Provided the scores of this Final exam have a nearly symmetric/bell-curve distribution, what percent of students score below 142.8 OR above 146.9 cal Enter a Points possible: 5 Unlimited attempts. Score on last attempt: 0. Score in gradebook: 0 Message instructor about this question more License
the
test scores ranged from 30 to 80
) As a rule of thumb, the entire range of a data large data set is approximately 4 to 6 standard deviations. Estimate the range of the standard deviation for the exam scores, using this information and the information in this problem. (Round your answers to two decimal places, if necessary.)
rk (Copy) Score: 0.5 of 1 pt 23 of 35 (21 complete) 2.4.7 Discuss the similarities and the differences between the Empirical Rule and Chebychev's Theorem What is a similarity between the Empirical Rule and Chebychev's Theorem? A. Both do not require the data to have a sample standard deviation. B. Both estimate proportions of the data contained within k standard deviations of the mean. C. Both calculate the variance and standard deviation of a sample. O D. Both apply...
The boxplot of the exam scores for the students in an introductory statistics course is given below. The distribution of the scores is 30 40 50 60 70 Score 80 90 100 Symmetric and bell-shaped Positively skewed O negatively skewed Symmetric but not bell-shaped A Ph.D. graduate has applied for a job with two universities: A and B. The graduate feels that she has a 60% chance of receiving an offer from university A and a 50% chance of receiving...
Scores on an accounting exam ranged from 41 to 95, with
quartiles Q1 = 50.25, Q2 = 58.5, Q3 = 81.50. (a) Select the correct
box plot for the given data.
(a) Select the correct box plot for the given
data.
BoxPlot A
BoxPlot B
BoxPlot C
A B C
(b) Describe its shape (skewed left, symmetric,
skewed right).
The distribution is symmetric.
The distribution is skewed left.
The distribution is skewed right.
- BoxPlot BoxPlot 40 50...
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