On a multiple choice test with 9 questions, each question has four possible answers, one of which is correct. For students who guess at all answers, find the mean for the number of correct answers.

Q: Approximately 10% of students have a composite score below what level

A: If X is the composite score of the students, then we need to search for a x, such that P[X≤x]=0.1.

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: 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: 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: An IQ score for which 15% of the population has a higher score and 85% have a lower score…

A:

Q: There are 5 questions on a multiple choice exam, each with five possible answers. If a student…

A: One question has 5 options and only one is correct.

Q: A quiz consists of 30 true or false questions if the student guesses on each question what is the…

A: According to the provided information, n=30 Since the questions are true or false type questions.…

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: . A population has a mean of μ = 40. a. If 5 points were added to every score, what would be the…

A: Given that population mean is given by 40

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: 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: 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: 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: For the survey method to be valid, a representative sample of peoplemust be polled. T or F?

A: The survey methodology essentially involves the study of individuals (or a specified group of finite…

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: If all scores are of the same frequency, what is the mode? A highest score B middle score C) lowest…

A:

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

A: From the given information,

Q: A survey asks: Which online services have you used in the last month: - Twitter Facebook - Have used…

A:

Q: A cafeteria manager surveyed a random sample of students at a school to determine which of 2 meal…

A:

Q: The sample proportion Is defined as Multiple Choice x/n n!

A:

Q: Find the odds against correctly guessing the answer to a multiple choice question with 6  possible…

A: According to the provided information, a multiple-choice question with 6  possible answers.

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: If the mean of five values is 8.8 and four of the values are 6, 7, 6 and 12, find the fifth value.

A: Given: The mean of five values is 8.8  The four values are 6, 7, 6 and 12 Consider, the fifth value…

Q: In last year, five ranndomly selected students took a math aptitude test before they began their…

A: a) Excel Procedure: Enter X and Y in Excel>Data>Data Analysis> ‘Regression’>Select Y…

Q: Find the point estimate for the population proportion.             A Southern student wants to know…

A: It is given that the sample size (n) is 888 and the number of people spoke 2 or more languages is…

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

A:

Q: If the proportion of Heads is .25 out of 200 flips, what is the p-value? Round to three places.

A: Given : The proportion of Heads is .25 out of 200 flips.

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: 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: Find the mean of these values assuming the first five values are each worth 10% and the last value…

A: We have the data set: 2, 6, 10, 14, 20, 32 We need to calculate the mean of these values assuming…

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: 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: The mean score on a test is 75, the median score is 80, and the mode score is 85.  Pat got an 82.…

A: Given: The mean score on a test is 75, the median score is 80, and the mode score is 85.

Q: Give five different numbers whose mean is 11 and range is 14.

A: Here use basic formula of mean and range

Q: Katrina must take five exams in a math class. If her scores on the first four exams are 71, 69, 85,…

A: Given that Katrina scores on the first four exams are 71, 69, 85, and 83 and suppose she scores x…

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 number of miles that Jenna cycled each week for a 7-week period is shown: 36, 42, 28, 52, 48,…

A: Given data: 36, 42, 28, 52, 48, 36, 31 Data in ascending order. 28, 31, 36, 36, 42, 48, 52

Q: Circle the error and fix the numbers in the two-way table. In a survey of 100 participants, 60…

A: Note:  We'll answer the first question, since the exact one wasn't specified. Please submit a new…

Q: What is the value of ΣX for the scores 2, 5, 3?

A: Given data2,5, 3ΣX = 2+5+3 = 10

Q: Given a scenario where n=100 and p=0.8, find the mean.

A: In this case the sample size is n = 100 and p = 0.8.

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.