A student has two test scores. The difference between the scores is 12 and the mean, or average, of the scores is 80. What are the two test scores?

Q: A set of N = 10 scores has a mean of µ = 50.  If 20 points are added to one of the scores, what is…

A: It is given that the number of scores in the set is 10 and the population mean is 50.

Q: A college counselor wants to determine if the number of hours spent studying for a test can be used…

A: An explanatory variable is the one which can be changed independently or what you manipulate or…

Q: In​ Lindsay's class, there were three students who scored 80 on a test and six students who scored…

A:

Q: For a raw data, the arithmetic mean is 24 and sum of the observations (values) is 840. One of the…

A: Here given that  Sum of observation is 840Mean is 24

Q: The mean of a sample is 40. What will the mean become if a) 9 points are added to each score? b) 18…

A:

Q: The mean of 11 numbers is 48. Removing one of the numbers causes the mean to decreaseto 43. . What…

A: Measures of Central Tendency: A measure of central tendency represents the central value or typical…

Q: As an economics class project, Debbie studied a random sample of 14 stocks. For each of these…

A:

Q: The mean of 14 numbers is 47.  Removing one of the numbers causes the mean to decrease to 43. What…

A: Given that Number of observations N = 14 Mean = 47

Q: find the mean for the number of correct answers

A: A multiple choice test with 17 questions, each question has four possible answers, one of which is…

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: A student has two test scores. The difference between the scores is 8 and the mean is 81. What are…

A:

Q: After six biology test, Ruben has a mean score of 77. What score does Ruben need on the next test to…

A:

Q: If your score on your next statistics test is converted to a z score, which of these z scores would…

A: Given that  The Z-score are -2.50, -1.50, 0, 1.00, 2.25

Q: If X-B(7,0.2), the mean is

A: Formula : Mean = np

Q: For the data 100, 500, 300, 100, 2000; the most effective measure of location is

A: The measures of location are median, quartiles and percentiles. The median is also known as second…

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: The average score in a Science exam was 82 with a SD of 4. The average score on a Math exam was 96…

A: Given : For Science Exam : =82 =4 For Math Exam : =96 =3

Q: On a stats exam with μ = 82 and σ = 10, Student A scored 7 points below the mean, Student B had a…

A: Given Data: z-score of student A=(-7/10)=-0.7 z-score of student B=(85-82)/10=0.3 z-score of student…

Q: After taking a series of 4 classroom examinations, John obtained a mean score of 82. How much score…

A: Mean is a part of measures of central tendency.

Q: Suppose you have information about average heights of a random sample of airline passengers. The…

A:

Q: A data set contains three points, and two of the residuals are -10 and -20. What is the third…

A:

Q: Which one measure of variation would you report for the variable SEX (1=male, 2=female )

A: Variance is a single statistic that measures the spread or variation of a data set.

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

A:

Q: Suppose that there is a negative relationship between grade point average and the number of hours…

A:

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

A:

Q: A sample of n equals 20 scores is transformed into z-scores what is the meaning for the set of 20…

A:

Q: on a multiple choice test with 20 questions, each question has 4 possible answers, one of which is…

A: We have to find mean  for students who guess at all  correct answers..

Q: The test statistic for the rhino data, x^2= 3.85, suggests that:

A: Given that, The test statistic for the rhino data, x^2= 3.85,

Q: find the mean if Z-score =14, st.Dev.=2.5, for a score of 8.5

A: Standard normal distribution:The standard normal distribution is a special case of normal…

Q: In 2015, Gary earned $25,300. In 2016, he received a raise and earned $28,100. Comparing Gary’s…

A: follow next step

Q: What number was removed?

A: This is a basic application of average . Average forms a firm backbone of high school mathematics .

Q: The mean of data set A is 42. The mean of data set B is 47. The mean absolute deviation (MAD) of…

A: The mean of data set A is 42.

Q: The mean of data set A is 42. the mean of data set B is 47. the mean absolute deviation (MAD) of…

A: given dataμA =42μB = 47∴ difference = 47-42 = 5MAD = 2.5

Q: The mean of five numbers is 5. If one of the five numbers is removed, the mean becomes 6. What is…

A: The mean of five numbers is 5.So total of those 5 numbers = 5*5= 25

Q: The mean weight of 150 students in a class is 60 kg. The mean weight of boys in the class is 70 kg.…

A:

Q: The mean of the scores 2, 2, 2, 6 is?

A: Given score is2,2,2,6

Q: If CV for an English Test is 62.5% and the CV for a History test is 62.5% , Compare the variation of…

A:

Q: atistics can be intimidating, but it can also be rewarding. Describe at least two benefits to your…

A: There are lots of examples of statistics used by a student as below: 1) When a student studies the…

Q: A colleague of yours is faced with testing a relationship at the .05 level or significance or the…

A: Level of significance The level of significance is defined as the probability of rejecting a null…

Q: Which of the 2 predictors, Gest or Weight, is a better predictor of Height?

A: Solution:

Q: For the data set 7 6 4 9 5 the median

A: The median is the middle data point in a sorted data set. The given data set is [7, 6, 4, 9, 5]…

Q: Suppose you have information about average heights of a random sample of airplane passengers. The…

A: Form the given information, The mode is 70 inches, the median is 68 inches, and the mean is 71…

Q: The mean of 10 numbers is 49. Removing one of the numbers causes the mean to decrease to 45. What…

A:

Q: A student has two test scores. The difference between the scores is 8 and the mean, or average, of…

A: Given: A student has two test scores. The difference between the scores is 8 and mean, or average,…

Q: A student has two test scores. The difference between the test scores is 20 and the mean, or…

A: Suppose the two test scores of students are x and y. Given that the difference between the two test…

Q: If Study determines the difference an average salaries are so population of people with blue eyes…

A: From the provided information, The study determines the difference in average salary for sub…

Q: In a data set with 25 scores, if the value 16 occurs 12 times, what is its relative frequency?

A: It is given that the data set contains 25 scores and the value 16 occurs 12 times in the data.

Q: ter six biology tests, Ruben has a mean score of 73. What score does Ruben need on the next test to…

A: Given data,After six biology tests, Ruben has a mean score of 73Which means∑x6=73∑x=438What score…

Q: On a multiple choice test with 9 questions, each question has four possible answers, one of which is…

A: It is given that there are 9 questions and each question having four possible, one of which is…