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: Al gave correct answers to 47 of the 50 questions on the driving test . What percentage of the…

A: We can give the correct answer in the below st

Q: On a test, a student got 80% of the items correct. If the Student got 56 items correct, how many…

A: Let x be the items on the test given: 80% of x is 56

Q: Is the average time to complete an obstacle course different when a patch is placed over the right…

A: There are two independent samples which are right and left. We have to test whether the average time…

Q: Hans has scored 75, 73, and 93 on his previous three tests. What score does he need on his next test…

A: Person H has scored 75, 73, and 93 on his last three tests.

Q: In 2016 the Better Business Bureau settled 77% of complaints they received in the United States.…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

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: 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: 00 subjects were studied and 120 of them expressed a preference for brand x, what percentage…

A: The 200 subjects were studied; n=200 120 of them expressed a preference for brand x; x=120

Q: Explain the value of p?

A:

Q: condition. Find the lower cutoff score (number of berries which will go for juice).

A: The z score can be calculated as: z=x-μσ The required z score that is associated with the bottom…

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

A: From the Percentages

Q: The average (mean) score on an exam was 76.375 in a class consisting of 21 Administration students…

A: From the provided information, The average score on an exam was 76.375 consisting 21 Administration…

Q: Alex is 80th in his class of 320 students. What is his percentile rank in class?

A: Data given p=80, n=320

Q: se Brianna's sample to estimate the number of red gumballs in the jar.

A: Given that  Class jar containing 200 gumballs of two different colors  (Red and green) Brianna draws…

Q: Of the 328 patients that completed the survey last year, 211 of them claimed to be returning…

A: Given: 328 patients completed the survey 211 patients returning

Q: In a survey of 1536 adults, 36% responded "yes" to the survey question. How many adults answered…

A: From the provided information, Sample size (n) = 1536 36% responded “Yes” to the survey question.…

Q: In a recent study, 46% of people enjoy country music.  If 200 people are surveyed about their…

A: Given : Proportion (prop.) of people enjoy country music p = 46% = 0.46 Sample size of people n =…

Q: Noah scored 25 points in a game. Mai's score was 35 points. The mean score for Noah, Mai, and Clare…

A:

Q: When taking a 19 question multiple choice test, where each question has five possible answers, it…

A: From the given information ,   Sample size , n= 19 Probability of success, P = Using formula ,

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: Assume a Normal distribution. What can be concluded at the the αα = 0.01 level of significance…

A:

Q: Jose has scored  79 ,  84 , and  85  on his previous three tests. What score does he need on…

A: Step 1:. The formula for average is:Average=Number of scoresSum of all scores​ Let's apply this…

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: Give an example of a set of 10 numbers for the following:  an average equal to the median.

A: The number of observations is 10.

Q: Suppose that 35% of people own dogs. If you pick two people at random; what is the percent that they…

A: Solution: From the given information, the probability of people own dog is 0.35. Here, two people…

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

A:

Q: The proportion of commuters on PSU – Berks campus is purported to be 65%. A professor believes this…

A: Given P0=65% = 0.65 Let X = Number of commuters on PSU  X = 200 n = 300

Q: You want to find out the top three food items sold in your school cafeteria. Select the best way to…

A:

Q: A man is 80% sure how much he loves 5 females (player, player J) but he wants to make sure he’s 99%…

A: A man is 80% sure how much he loves 5 females (player, player J) but he wants to make sure he’s 99%…

Q: A group of researchers want to investigate the academic performance of the college students in…

A: Given that, N = 12000 Margin of error (e) = 0.05 The formula for calculating the sample size is,

Q: Find the weighted mean of four test results, 65, 89, 105 and 101, where the first test counts 22%,…

A: Given:   x weight 65 22% 89 32% 105 17% 101 29%

Q: Find the median of the given sample: -11, -12, -10, 9, -8, -7, -6 O -10 -8 -9

A:

Q: Three cars are driving on a racetrack. The mean speed of the three cars is 100 miles per hour. Car X…

A: The objective of this question is to find the speed of Car Z using the mean speed of the three cars.

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.