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%) Instructor-created question Question Help 68-95-99.7% Rule_1 In a class, the bottom 16% of the students...
miben so with the 68-95-99.7 Rule) on the included normal distribution 1. Suppose exam scores form...
miben so with the 68-95-99.7 Rule) on the included normal distribution 1. Suppose exam scores form an approximately normal distribution that has 500 points and 100 points. Letter grades on the exam were distributed as follows: Ds made up 15% of the exam, Ca 59%, Bs 13.5%, As 2.5%, and the rest Fs. () If 1466 students scored 733 points or more, how many students took the exam? students (b) What are the point cutoffs for each letter grade? <A...
Answer the following question involving "The Normal Distribution and the 68-95-99.7 Rule" and show how I...
Answer the following question involving "The Normal Distribution and the 68-95-99.7 Rule" and show how I got the answers below. Answers: 1)a) 68% b) 47.5% c) 2.5% 2) 12 or 13 people Questions: 1) A population of dogs have weights that are normally distributed with an average of 30 pounds with a standard deviation of 3 pounds. a) What percent of the dogs weigh between 27 and 33 pounds? b) What percent of the dogs weigh between 30 and 36...
please help on both 1.) We learned in section 6.1 that the Empirical Rule (a.k.a 68-95-99.7...
please help on both 1.) We learned in section 6.1 that the Empirical Rule (a.k.a 68-95-99.7 rule) is a good estimate of probability within a specific number of standard deviations from the mean for any normal distribution. We know that this rule only provides a good estimate and that it is not very precise. With use of the Normalcdf function in our calculator, we can find exact values. For example, when using the Empirical Rule 95% is expected to be...
The results from a statistics class' first exam are as follows: The mean grade obtained by...
The results from a statistics class' first exam are as follows: The mean grade obtained by its 25 students is 83, with a standard deviation of 11. The distribution of grades was unimodal and symmetrical. What is the probability that a student received a grade above 90? The results from a statistics class' first exam are as follows: The mean grade obtained by its 25 students is 83, with a variance of 121. The distribution of grades was unimodal and symmetrical....
Using only the 68-95-99.7 rule answer the following question. Let the variable Z be a z-score...
Using only the 68-95-99.7 rule answer the following question. Let the variable Z be a z-score of a normal distribution. Calculate P(Z ≤ 3). Draw a picture of the situation first. Shade the area that corresponds to the desired proportion being sought. Please explain how you would use the 68-95-99.7 rule to solve this. If you can, how would you solve this using technology rather than the rule?
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the...
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 23 students, and the distribution of total study hours per week is bell-shaped with a mean of 13 hours and a standard deviation of 3.4 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between hours and hours on Statistics each week. b) 95% of the students spend between hours and...
please do all asap Question 7 2.5 points Save Answer Use the 68-95-99.7 rule to solve...
please do all asap
Question 7 2.5 points Save Answer Use the 68-95-99.7 rule to solve the problem. Assume that a distribution has a mean of 21 and a standard deviation of 4. What percentage of the values in the distribution do we expect to fall between 17 and 217 17% 25% 68% 34% Question 5 Use the Venn diagram to list the elements of the set in roster form. U B 11 14 13 17 12 15 16 18...
A professor at a local university noted that the grades of her students were normally distributed...
A professor at a local university noted that the grades of her students were normally distributed with a mean of 73 and a standard deviation of 11. Answer the following questions rounding your solutions to 4 decimal places. The professor has informed the class that 7.93 percent of her students received grades of A. What is the minimum score needed to receive a grade of A?
a history class is comprised of 8 students, 3 female, 5 male. if the instructor of...
a history class is comprised of 8 students, 3 female, 5 male. if the instructor of the class randomly chooses 6 students from the class for an oral exam what is the probability that 2 female and 4 male students will be selected. round to 3 decimal places.
Question 9 of 13 (points) Attempt 1 of 1 | View question in a popup th...
Question 9 of 13 (points) Attempt 1 of 1 | View question in a popup th 56m Remaining 72 Section Exercise 50 (table) Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 76 and a standard deviation of 9. Use the Cumulative Normal Distribution Table to answer the following. (a) Find the 25th percentile of the scores. (b) Find the 79th percentile of the scores, (c) The instructor wants to give...
miben so with the 68-95-99.7 Rule) on the included normal distribution 1. Suppose exam scores form an approximately normal distribution that has 500 points and 100 points. Letter grades on the exam were distributed as follows: Ds made up 15% of the exam, Ca 59%, Bs 13.5%, As 2.5%, and the rest Fs. () If 1466 students scored 733 points or more, how many students took the exam? students (b) What are the point cutoffs for each letter grade? <A...
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 23 students, and the distribution of total study hours per week is bell-shaped with a mean of 13 hours and a standard deviation of 3.4 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between hours and hours on Statistics each week. b) 95% of the students spend between hours and...
please do all asap
Question 7 2.5 points Save Answer Use the 68-95-99.7 rule to solve the problem. Assume that a distribution has a mean of 21 and a standard deviation of 4. What percentage of the values in the distribution do we expect to fall between 17 and 217 17% 25% 68% 34% Question 5 Use the Venn diagram to list the elements of the set in roster form. U B 11 14 13 17 12 15 16 18...
Question 9 of 13 (points) Attempt 1 of 1 | View question in a popup th 56m Remaining 72 Section Exercise 50 (table) Exam grades: Scores on a statistics final in a large class were normally distributed with a mean of 76 and a standard deviation of 9. Use the Cumulative Normal Distribution Table to answer the following. (a) Find the 25th percentile of the scores. (b) Find the 79th percentile of the scores, (c) The instructor wants to give...
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