Empirical Rule Name Date 500 freshmen at Crescent High School took an algebra test. The scores were distributed normally with a mean of 75 and a standard deviation of 7. 1 Use the information

Q: Find the percentage of data points that lie between -2.31 and 1.85.

A: Assuming the data follows standard normal distribution with mean 0 and standard Deviation 1Finding…

Q: You just took the GRE (in preparation for graduate school) and received a total score in the 98th Is…

A: Percentiles are used to measure position of a data.

Q: percent

A: Please refer to the image below

Q: Sally just received her SAT results. Her SAT mathematics score was 600 and is in the 74th…

A: The score is 600 and it is the 74th percentile.

Q: What is the value of Ex² for the scores 1, 0, 2, 4? O 21 O 28 O 14

A:

Q: the average score of 10 students is 85. what will be the mean if another student will take the test…

A: From the provided information, Average score of 10 students = 85

Q: Mrs. Cruz is a Math teacher; she gives a 60 item test for remedial class. The scores of 20 students…

A: Deciles divide the ordered data into 10 equal parts.   There are 20 values in the data. So, n = 20.…

Q: What's the median of 10.2,12.6,20.4, and 13.6 to 3 decimal places

A: It is an important part of statistics. It is widely used.

Q: The temperature for the last 5 days were: 75⁰F, 66⁰F, 80⁰F, 68⁰F and 73⁰F. What was the mean…

A:

Q: Four out of five students got As in math. What percent of students got As in math?

A: From the Percentages

Q: What is the average of  2.0, 32.0, 44.0, 14.5, 7.5 ?

A: For a set of n observations, x1, x2, ... , xn, mean or average is given by, This is measure of…

Q: A poll showed that 46.9% of Americans say they believe that some psychics can help solve murder…

A:

Q: What is the median? 2 5 6

A: Median: For odd number data sets, the median is n+12th data value.

Q: What percentage of books read 76 books out of 80 total books

A: Solution:

Q: he percentage of bags weighing between 8.9 and 9.46 ounces is The percentage of bags weighing…

A: According to our guidelines we will solve only first three sub-parts of a question and rest will be…

Q: The median age of five people in a meeting is 40 years. One of the people who leaves the room are 60…

A: The median age of five people in a meeting is 40 years.

Q: Yesterday Al recorded 5 data values, and the mean of those values was 90. Today he realized the data…

A: Given dataMean of 5 data values = 90Data value 80 was actually 50Mean is given by

Q: Give the scores: 88, 64, 77, 94, 67, 59, 99, 87, 94, 71,75 Find the score at the 72nd percentile or…

A: Given data is88,64,77,94,67,59,99,87,94,71,75sample size(n)=11

Q: 19. A set of 8 numbers has a median of 19. If the numbers are arranged from largest to smallest,…

A: Given, a set has 8 number and has median 19. The numbers are arranged in descending order (largest…

Q: The mean score of a girl in 3 tests is 68. What should her mean score in 2 remaining tests be in…

A:

Q: Find the median: 25, 18, 17, 29, 40 Median=

A: Given data set: 25, 18, 17, 29, 40

Q: How do you determine which exam score is higher relative to others

A: The normal distribution is a continuous distribution.

Q: The mean of 200 items was 50. Later on it was found that two items were wrongly taken as 92 and 8…

A:

Q: The test score at the 25th percentile is 108. What is the test score at the 75th percentile?

A: Solution

Q: scores

A:

Q: competed in an ironman race, J

A: Here it is given that - 3500 people competed in an ironman race, John finished 805th,

Q: student wants to know his average homework grade for the first half of his math class. There were 7…

A: Given data, 100,90,95,89,92,85,95 What is the population mean of his homework grades?

Q: Rafael has scored 81, 77, 60, 71, and 90 on his previous five tests. What score does he need on his…

A:

Q: ege students are foreign students the students at this university are foreign? %

A:

Q: Jovan asked 2000 people if they are afraid of spiders. 274 people said yes. What percent of the…

A: The given data is: Total number of people=2000 People afraid from spider is 274

Q: A student completed an exam and their z score was -1.57. What percentage of students did better on…

A: We know that Z-score = (x - mu)/sigma  mu= 0 , sigma =1   X~N( 0,1)

Q: Find P₄₁ , which is the score separating the bottom 41% from the top 59%. P₄₁ =

A: It is given that the area is 0.41.

Q: Explain the difference between  a. frequency and relative frequency. b. percentage and relative…

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Q: what proportion of 112 is 21?

A: It is needed to find the proportion of 112 that is equal to 21.

Q: Mary is participating in a 6-day cress-country biking challenge. She biked for 60, 51, 62, 63, and…

A: According to the question, 60+51+62+63+54+x6=59                    x = 64

Q: Professor X  gave a quiz to five students.  He remembered four of the grades 82, 88, 81, 77 and the…

A: Given observation 82, 88, 81, 77 Mean = 80

Q: A random sample of 30 males between ages 25 – 40 is taken for a health and fitness study. Following…

A: Here: x=78.33s=7.28n=30z=1.645 for 90%       1.96 for 95%       2.326 for 98%

Q: The mean of 14 numbers in a data set is 43. A new number is included in the data set. It changes the…

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Q: Trying to find out Which score is better, a 75 on History or Score of 27 on Psychology

A:

Q: 25  people out of 45 recieved an A on  the first exam .what percentage of student got an A ?

A: According to the given information,Total number of people, N = 45Number of people got an A, n(A) =…

Q: 75 out of 100 as a percentage

A:

Q: 79% of 67 miles is what?

A: Let 79% of 67 miles = x