12. Jackson has scores of 80, 90, 83, and 81 on four Math quizzes. What is the score he needs on the next quiz to achieve an average above 85?

Q: We are interested in determining if absences from a class affect your overall class grade. The 101…

A: Simple linear regression model: A simple linear regression model is given as y^ = b0 + bx + e…

Q: (a) What percentage of people has an IQ score between 70 and 130? (b) What percentage of people has…

A:

Q: 3. 12 people got an A, 11 people got a B, 31 people got a C, 9 people got a D, and 5 people got an…

A: Percentage can be calculated, suppose for the people who got C as  (No. Of people who obtained C ÷…

Q: 4.72b: What is the requested score?

A: From the question 4.70,the score of mean is 513 and standard deviation 130 and the scores are…

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: 11) According to-the given data, how many of the passible sandwich combinations include either roast…

A: There are 5 kinds of beef and 4 types of cheese. If roast beef or salami is selected then there are…

Q: 1. A local news report claims that 40% of the vehicles on the freeways are vans or SUV's. You go to…

A:

Q: 13. Andi wants to know if there is a difference in income if he is studying and not attending…

A: Calculate the Sample means and Standard deviations for two groups

Q: 3. Determine whether sex relate with the spelling proficiency of selected senior high students.…

A: For concluding the discrepancies between the theoretical values (i.e., the true score in terms of…

Q: In a business survey for the Best Purchase Company Joey found from collecting data on 100 households…

A: Solution

Q: 14) A researcher at a major clinic wishes to estimate the proportion of the adult population of the…

A:

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: A boxplot for a set of 32 scores is given below. How many scores are represented in the blue…

A: Given:

Q: 1. Suppose you have a 88 on your daily assignments, 94 on your major tests, and a 80 on your final.…

A:

Q: 12) According to the given data, how many of the possible sandwich compinations include turkey and…

A: The person can choose turkey in 1 way. The person can choose the American cheese in 1 way.

Q: (a) What percentage of people has an IQ score between 90 and 110? (b) What percentage of people has…

A: Given that  Mean = 100 and  SD = 10

Q: You plan to make a survey of 200 people. The plan is to talk to every 10th person coming out of the…

A: A sample is a sub part of population and it is selected randomly such that it is representative of…

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

A:

Q: M= 90 SD= 7.8 What raw score is needed to be in the top 8%?

A: *Mean μ=90SD σ=7.8Top 8%⇒P(X>x)=0.08⇒P(X≤x)=092Corresponding  z-score is obtained as

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: In a survey of 97 pet owners, 26 said they own a dog, and 61 said they own a cat. 18 said they own…

A: Given : Total number of pet owners = 97 number of dog owners= 26 number of cat owners = 61  number…

Q: Suppose that the results of a survey show that  24%  of people consider summer as their favorite…

A: Solution: From the given information, p=0.24 and E=0.02.

Q: The average ( arithmetic mean) of 6,19, and x is 19. What is the value of x?

A:

Q: 7) A researcher at a major hospital wishes to estimate the proportion of the adult population of the…

A: Given that, Critical value: Using the z-table, the critical value at 99% confidence level is

Q: 18. the mean of 7 numbers is 63. What is the sum of the numbers?

A: It is given that Number of observations n = 7 Mean = 63

Q: #15 What is the correct answer ?

A:

Q: 2.) Suppose you scored 75, 64, and 79 on your first 3 math tests. a.) What is your current average?…

A: a) Average of 75,64 and 79: 75+64+793=2183=72.67

Q: 12. Find the median. 5, 8, 9, 2

A: Here we need to find the median.

Q: d. If marbles from Bag C were drawn 10,000 times, about 600 red marbles are likely to be drawn. e.…

A: d. The number of red marbles are likely to be drawn from Bag C of 10,000 times is, Red…

Q: 5) At Bill's community college, 41.7% of students are Caucasian and 2.7% of students are Caucasian…

A: Given that 41.7% of students are Caucasian and 2.7% of the students are Caucasian math majors.…

Q: 13. The City Animal Control Department found out that 25 of the 90 squirrels that they trapped and…

A:

Q: 2: The median age of the children is: 29 30.5 28.5 28

A: Given ages are, 36,42,18,32,22,22,25,29,30,31,19,24,35,29,26,36,24,28   Sort the data in Ascending…

Q: 1. James expects to get an 85% on his statistics final, but admits the margin of error is 15%. What…

A: Solution-: Given: We find the lowest score James expects to receive=?

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: 1.) I want to estimate the proportion of adults who like sci-fi movies. How many people should I…

A:

Q: 2.) Suppose you scored 75, 64, and 79 on your first 3 math tests. a.) What is your current average?

A: We are given scores of 3 math tests which are 75, 64, and 79 We need find the current average of…

Q: If the mean of a set of scores is 12 and a new set is created by multiplying each score by 3, what…

A:

Q: How large a sample is needed

A: Given :  Margin of error=E=3%=0.03 Significance level=α=0.01 The critical value is ,…

Q: The Venn Diagram below shows the number of students being surveyed. DRUM GUITAR 21 10 19 10 1. How…

A:

Q: #20 what is the correct answer ?

A:

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: 2. An eye doctor keeps track of whether people who come in for testing need glasses. When she…

A: Solution: The observed frequency table is    Glasses  No Glasses  Row Total  Brown  43 55 98…

Q: your pizza, how many different pizzas can you order at Pizza Gut?

A: Pizza Gut sells only pizza. They offer five types of crust, five types of cheese, four meat toppings…

Q: A researcher wants to test whether UBC students are more intelligent than the general population. He…

A: Given: population mean (μ)=100population standard deviation (σ)=15sample size (n)=36Sample mean…

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: 12. An eye doctor keeps track of whether people who come in for testing need glasses. When she…

A:

Q: 9. A neighborhood watch association surveyed 40 neighbors about their feelings of safety in the…

A:

Q: 39 The five summary for scores on a statistics exam is 35, 68, 77, 83, 97. In all, 196 students took…

A: Given that, the five-number summary is 35, 68, 77, 83 and 97.

Q: In a survey of 104 pet owners, 61 said they own a dog, and 39 said they own a cat. 34 said they own…

A: Answer - Given, In a survey of 104  pet owners, n(A) = 61 said they own a dog, and  n(B) =  39 said…

Q: 42 If a hockey team's win: loss: tie ratio is 5: 2: 3 after their last 30 games, how many games have…

A: If a hockey team's win:loss:tie ratio is 5:2:3 after their last 30 games, how many games have they…