find the mean for the number of correct answers

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: 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 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: Find eight numbers such that the mean, the median, and the mode of the numbers are all 45, and no…

A: Let us consider the number : 42,43,44,45,45,46,47,48

Q: When taking a 29 question multiple choice test, where each question has five possible answers, it…

A: Solution 10 or More questions are unusual

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: On a multiple choice test with 25 questions, each question has four possible answen is correct. For…

A: We have to find mean  of correct answerfor given data ...

Q: A set of data has a mean of 16,  a median of 15 and a mode of 14. which of these numbers must be…

A: From the information, the mean is 16, median is 15 and mode is 14.

Q: When taking a 26 question multiple choice test, where each question has five possible answers, it…

A: Here n = 26 and p = 0.2

Q: When taking a 34 question multiple choice test, where each question has five possible answers, it…

A: Given information- No. of question on multiple choice test, n = 34 Probability of correct answer, p…

Q: If the aggreat is 30 and the mean is 10. How many sets of numbers are used

A: According to the provided information, The aggregate is 30 and the mean is 10

Q: When taking a 24 question multiple choice test, where each question has five possible answers, it…

A: From the given information,

Q: A pollster wishes to estimate the proportion of United States voters who favor capital punishment.…

A:

Q: If a child psychologist wanted to determine if there is a relationship between gender of a child and…

A: Chi-square test of independence should be used here.

Q: A telecommunications company conducted a survey about cell phone companies. Of 1800 randomly and…

A: given  x = 1275 preferred AT&T to Sprint n =Of 1800 randomly and independently selected people…

Q: When taking a 28 question multiple choice test, where each question has five possible answers, it…

A: Given data when taking a 28 question multiple choice test where each question has five possible…

Q: The mean salary of twelve men is $52,000, and the mean salary of four women is $85,000. Find the…

A: From the given information,

Q: SRS of 25 commuters to the Washington DC re selected, and each is asked how far they ommute to work…

A: Given data,n=25The sample mean x=39Sample sd     s=6Construct 90% CI?

Q: When taking a 34 question multiple choice test, where each question has five possible answers, it…

A: Here n= 34  and p = 1/5 =0.2 Mean = np = 34*0.2 = 6.8 SD = sqrt(np(1-p)) = sqrt(34*0.2*0.8) = 2.3324

Q: About 7% of males are colorblind. Hoping to find many colorblind men for her study, a researcher…

A: It is given that p =0.07 and n = 433.

Q: The mean salary of twelve men is $55,000, and the mean salary of four women is $85,000. Find the…

A: Mean or Average :

Q: (d) If the bottom 10% of students will fail the test, what is the lowest mark that a student can…

A: Given that, the mean value is μ=75 and standard deviation σ=15. It is known that, the formula for…

Q: If the mean of 14, 6, 2, 11 ,12, 5, 5,14, 7, P, 5 is 9, find the value of P

A: To find- P

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: Sam received scores of 84,86,83,90 and 87 on five tests. Hola had scores of 90,75,94,68 and 98 on…

A: Now we apply the formula of getting average = Sum of all scores / Total matches playedSo average…

Q: When taking a 17 question multiple choice test, where each question has five possible answers, it…

A: We have to find unusual events...guess..

Q: When taking a 15 question multiple choice test, where each question has five possible answers, it…

A: From the given information,

Q: A sample of n = 64 scores is selected from a population with µ = 80 and with σ = 24. On average, how…

A: Given A sample of n = 64 scores is selected from a population with µ = 80 and with σ = 24. On…

Q: What number was removed?

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

Q: The IQs of six boys are 111, 119, 122, 124, 123 and x. If their mean IQ is 120, what is x?

A: Given IQ's of six boys is111,119,122,124,123,xMean = 120

Q: To get a grade of C + , a student must have a mean average of 77 or greater. Jim has a mean average…

A: Jim has mean average of 76 for 10 quizzes. i.e. Jim has scored total of 76×10=760, combining all 10…

Q: The mean salary of twelve men is $57,000, and the mean salary of four women is $87,000. Find the…

A: The provided information are: Mean salary of 12 men = $57000 Mean salary of 4 women = $87,000 The…

Q: When taking a 17 question multiple choice test, where each question has five possible answers, it…

A:

Q: Give three numbers whose mean is 8, mode is 6 and median is 10 and range is 8.

A:

Q: A population with a mean of 8 has a sum of 40. How many scores are in the population?

A:

Q: If the mean of five values is 9.8 and four of the values are 13, 6, 9, and 12, find the fifth value.…

A: The formula of the mean is given by: mean = sum of observationsnumber of observations mean = 9.8

Q: A survey of 1104 adults nationwide asked, what irks you most about the actions of other motorists?…

A: Percentage is the ratio of people responded tailgators to the total people surved.

Q: A random sample of students was surveyed and asked to list their grade level and whether or not they…

A: Given, First finding for 6th grade, Pets + No pets = Total 28+No pets=38 No pets=38-28 No pets=10…

Q: A health psychologist want to investigate whether there is a relationship between sex and food…

A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have…

Q: 7. Find the mean of a student's test scores if he earned 95, 93, 85, 90, and 91 points on five…

A:

Q: When taking a 27 question multiple choice test, where each question has five possible answers, it…

A: Given information- No. of question on multiple choice test, n = 27 Probability of correct answer, p…

Q: Suppose that the result of a public opinion poll shows that just 10% of people would be willing to…

A:

Q: The mean of 3 numbers is 20. If one more number is included, the mean becomes 25. Find the included…

A: Given, mean of 3 numbers = 20

Q: 40 students took an exam, the passing score is 70. The mean score of students who passed are 75, the…

A: The mean of a dataset is calculated by dividing the sum of observations by the number of…

Q: What is the mean of the numbers 0.1, 0.11, and 0.111?

A: 0.1 + 0.11 + 0.111 = 0.321

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

A:

Q: Explain what each phrase means in the context of inferences for a population proportion. a. Number…

A: a. The phrase “number of successes” means that the number of members from the sample illustrates the…

Q: The mean of 12,22,32,42,52,62,72 is ?

A:

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…

Counting Principles

In statistics, the counting principle can be said to be the concept in which the quantity of an item is determined. There can be a single item, or a group of items, or items that are related to each other. In every possible set of items, the quantity of the possible item groups or their sorting measures can be determined with counting principles.