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

Q: A survey of 62 men found that 12 have a social media account. Another survey of 57 women found that…

A: Men are taken as group 1. Women are taken as group 2.   Given: n1=62x1=12n2=57x2=40α=0.07

Q: Jerri collects data from 100 people about how much mileage they put on their vehicle each week.…

A: Given information: Jerri collects data from 100 people about how much mileage they put on their…

Q: A survey of 78 men found that 10 have a social media account. Another survey of 51 women found that…

A: Given Information: Women: Sample size (n1) = 51 Out of which X1 = 26 have a social media account.…

Q: The mean of five positive numbers is 4.When another number is added, the mean becomes 8.Find the…

A: Here given that the mean of five positive numbers is 4. Therefore the total sum of numbers is…

Q: A group of college DJs surveyed students to find out what music to play for their upcoming party.…

A:

Q: The hockey team won 8 out of their first 14 games. At the Same Rate, how many games should they…

A: We can find the answer as below.

Q: Emma’s 100-meter dash time is ranked at the 96thpercentile among all highschool sprinters in the…

A: We have to find Emma's rank.

Q: The class consist of 50 students of which 35 are boys and remaining are girls. The average marks of…

A: Given that, Total =50 No.of boys =35 No.of girls=15 Average marks .of boys =45 Average marks .of…

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

A:

Q: The median of the five test scores is 82.  If four of the grades are 65, 93, 77, and 82, what can…

A: Given, Median of 5 scores=82 Four grades are 65,93,77,82 5th grade=?

Q: The compliment of guessing 3 correct answers on a 4-multiple-choice quiz is?

A: From the given data, we have to say that The compliment of guessing 3 correct answers on a…

Q: the average ( arthimetic mean ) of three  numbers is equal to 56 . if one of the numbers is 25 ,…

A:

Q: What is Multiple Comparisons?

A: In statistics and probability theory, Multiple Comparisons (also known as multiplicity or multiple…

Q: Anne's scores in the last four tests were 85,82,97 and 91. What must be her score in the fifth and…

A: Average is the arithmetic mean of a non-empty list of numbers. It is a single representative of that…

Q: A group has 20 man and 22 women what is the percentage of the women in the group

A: Given that, Total number of people = 20+22= 42 Man = 20 Women= 22

Q: Carl earned grades of 62, 78, and 89 on four math tests. What is the mean of his grades?

A: The grades earned by Carl are : 62, 78 and 89 The number of grades, n=3 To evaluate : The mean of…

Q: Juan scored 10 points higer on his midterm and 47 points higher on his final than he did  on his…

A:

Q: A student took all 8 tests in the first semester and had an average score of 82. Then the teacher…

A: The average is defined as the mid-value of an assumed data set. For observations, (n-number of…

Q: The average score of lovelyn in 6 math quizzes is 19. If she will not include her lowest score, her…

A: Let her lowest score be x and the other scores be a,b,c,d,e.

Q: The IQ score that separates the bottom 15% from the top 85% is P,5 =. (Round to the nearest…

A:

Q: The mean score of 10 students of an algebra class was 85. When two new students enrolled, the mean…

A:

Q: What percentage of scores are between scores 68 and 82?

A:

Q: Susan scored 82%, 75%, 77%, and 85% on the first four tests. What must she score on the fifth test…

A:

Q: An article in the Archives of Internal Medicine reported that in a sample of 224 men, 73 had…

A: Here 224 men and 232 women are selected randomly. 73 of the men had elevated cholesterol levels,…

Q: Why did the students come up with different values for the variable y

A: Given system of equation -5x-11y=-348x-12y=-4Student 1-Solve equation second 8x-12y=-48x=12y-4…

Q: The high tech industry claims that women have the same chance of being hired as men. If this is so,…

A: In this question, we need to find the expected number of company to have 11 or more female…

Q: Asurvey of 125 freshmen business students at a local university produced the results isted below.…

A: Here use venn diagram

Q: In order to pass a class, you need an average of 90 on 7 exams. If your test scores were 98, 86, 90,…

A:

Q: What is the value of ΣX2 for the scores 2, 4, and 5?

A: The scores are given as 2, 4, and 5.

Q: On three examinations, Elena received scores of 82, 91, and 76. What score does Elena need on the…

A: let Elena needs score X for her average score 85 we know that the average value formula average…

Q: Mr. White collected data from his eighth grade class on whether they prefer the zoo or the museum.…

A:

Q: A student has test scores of 68%, 73%, and 83% in a government class. What must she score on the…

A: Note: As per Bartleby’s guideline for more than one questions only first is to be answered please…

Q: Scott has grades of 86, 75, 79, and 95. If all of the grades count the same, what is the lowest…

A: Avarage value of five exams

Q: A recent survey reports that 22% of students take the bus to campus. If 660 students commute to…

A:

Q: 11. On their most recent math test, Jenny's score was 3 less than one half of Katie's score Ili…

A:

Q: Margarette scored to 94, 95, 89, 89, 98,96 and 92 in 7 quizzes in Mathematics 10. If there are 8…

A: Given scores in the quizzes are: 94, 95, 89, 89, 98, 96, 92

Q: What score separates the top 1% of students from the bottom 99% ?

A: Given Information: Mean μ=80 Standard deviation σ=20

Q: Which player had the higher average points when compared to the other players on his team? O Fredo

A: Given information: The average points and standard deviations for the players Freda and Kari…

Q: b. In a Pew Research Center poll on driving, 58% of the 1182 respondents said that they like to…

A: Step 1. (b) Total number of respondents is study =1182.

Q: Sony wants to administer a satisfaction survey to its current customers. Using their customer…

A: solution : the above question answer D is correct answer : Simple random

Q: The average score of Lovely in her 6 math quizzes is 19.If she will not include her lowest score,…

A: Average: It is defined as the ratio of the sum of numbers of the given data set to the total number…

Q: The pass result of fifty students who took up a class test is given elow: Marks Number of Students 4…

A: It is been asked to find average marks of students who failed using the given information.

Q: grade

A: We have to find the length of arc HK according to the given information

Q: If the mean of 5 values equals 34, then ΣΧ-

A:

Q: What is 4! = ?

A: As per the company guidelines we can solve first question. I hope that the given solution will help…

Q: What do you think would help students pay more attention in class?

A: Here we want to know bias in survey question or not.

Q: MEAN = 50,SD = 10, WHAT IS THE VALUE OF Z-SCORE WHEN X = 80.

A: Z-score follows standard normal distribution.

Q: find 4 points that are 10 points away from (1, 6)

A: To get points which are 10 points away from (1,6) horizontally, we add and subtract 10 from the x…