A car insurance company claims that 92% of its customers are happy with their service. You randomly call 57 customers, and find that 45 of them are happy. Is this number significantly lower than the claim?

Q: If three out of every eight trick-or-treaters that came to your house last Halloween were dressed as…

A: Simplify to get the answer.

Q: A state political analyst wanted to see whether there is an association between the region where a…

A: Expected count = Row total*Column totalOverall total

Q: A small-town mechanic says that 8% his customers come in for an oil change. When  1000 samples were…

A: Target population means, the set of elements that we want to know more about

Q: 3. The front row of a movie theatre has 23 seats. If you were asked to sit in the seat that occupied…

A:

Q: A hot topic of debate is whether the legal driving age should be raised to eighteen. From a random…

A: It is tested whether majority of the Americans believe the legal driving age should be raised to 18.…

Q: A small ice cream parlor has had great success over the past several years and is interested in…

A: Given information: Number of customers randomly selected in the sample, n = 56 Number of customers…

Q: If the Syracuse men's basketball team won 18 games and lost 10, and the Syracuse women's basketball…

A:

Q: A survey asked a random sample students if they estimated they spent more or less than an hour a day…

A: Given that   More  less  7th grade  24 25 8th grade 28 26 We have to find the number of…

Q: Suppose an experiment has 4 outcomes and the frequencies of the outcomes are 3/n, 11/n, 5/n, and…

A:

Q: How many people at the clinic have blood type AB? Which blood type does the least number of people…

A: A survey is a method of collecting data from the respondents to collect information for the…

Q: n 1995 a magazine reported the results of a poll of adult Americans in which it asked, "Have you…

A:

Q: If only 15% of people asked to mail in a survey respond, this is an example of

A: Given that  Only 15% of people asked to mail in a survey respond.  We know that  Response bias :…

Q: For its "Music 360" survey, Nielsen Co. asked teenagers and adults how each group has listened to…

A: Solution

Q: A taste-testing survey of Zing Farms showed that 2/3 of the people surveyed preferred the taste of…

A:

Q: How many success in the sample? How many failures in the sample? ? What size sample does the…

A: Answer:-  Given, n=1800

Q: An industrial/organizational psychologist wants to improve worker productivity for a client firm,…

A:

Q: A survey reported that 10% of 1800 employees favored a new insurance program. How many employees…

A:

Q: A climatologist is interested in comparing the frequency of cloud cover in Thunder Bay and Sudbury.…

A: Level of measurement is used to understand the nature of the variable. There are four type of level…

Q: A sample of 125 light bulbs contained 3 defective bulbs. How many defective bulbs would you expect…

A: To calculate the number defective bulbs in the batch of 3000 light bulbs. A sample contains 125…

Q: Suppose that in a survey of five-year-olds, 54% liked the letter A, 58% liked the letter B, and 49%…

A: Solution:robability of liking A  P(A)=0.54 Probability of liking B  P(B)=0.58 Probability of liking…

Q: Ahamed opened a restaurant 5 years ago, he made a survey of how the people rated his food according…

A: Note! Hi there! Thank you for the question. As there are multiple sub parts, according to our policy…

Q: If in a discrete data, 75% of the values are less than 30, then......?

A: we know that,  If Q1 is first quartile then we can say that 25% data points are below Q1. If Q2 is…

Q: music professor offers his 40 students the option of coming to an additional rehearsal session…

A: **  It is a type of observational study. Such type of study become bias. Because positive and…

Q: - In a survey of 500 students of a college, it liked watching hockey and 62% liked watc

A: Given, in a survey of 500 students of a college, it was found that 49% liked watching football, 53%…

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

A:

Q: researcher surveys a sample of n = 20 college students and asks each person to identify their…

A: Given Information:   n = 20 students

Q: A sample of 125 light bulbs contained 3 defective bulbs. How many defective bulbs would you expect…

A: Given infromation:A sample of 125 light bulbs contained 3 defective…

Q: a study with 5 groups, 6 samples each group, what are the degrees of freedom for the total, group,…

A: Given: Number of groups (k) = 5 Number of samples each group (n)=6

Q: In 2013, 46% of high school students tried a tobacco product. From a survey of 500 randomly…

A: Given : Population proportion =46% n=500

Q: A population is normally distributed with µ = 90 and σ = 8. For this population, which is the 29th…

A: Solution-: Given: μ=90,σ=8 We want to find 29th percentile?

Q: Suppose that in a survey of five-year-olds, 49%49% liked the letter A, 56% liked the letter B, and…

A: Given that P(A)=0.49 , P(B)=0.56 , P(C)=0.53

Q: If you selected a sample of n = 35 from a population whose μ = 56 and σ= 12, what would you expect…

A: Given information: The sample size is, n= 35. The mean of the population is, μ=56. The standard…

Q: In an advanced ballet dance class, it is claimed that 42% of dancers can successfully perform a…

A: Given: Sample size, n=27 No. of dancers can successfully perform a double pirouette turn, x=13

Q: Based on a sample survey, a company claims that 75% of their customers are satisfied with their…

A:

Q: Suppose that insurance companies did a survey. They randomly surveyed 450 drivers and found that 300…

A: Part a:          x = 300         n = 450         p' = 300/450 = 0.6667   Part b:  X is the number of…

Q: During the course of a year, the number of i-Pod shuffles being manufactured went from 75,000 to…

A: To find: The percent of decrease in the number of I-Pod shuffles. Given information: During the…

Q: What percentage of the students surveyed are education majors or mathematics majors?

A: We have given that the sample size 200. P( education majors) = 16% = 0.16 P( mathematics majors ) =…

Q: In a political poll, approximately 3/25 of the people asked preferred candidate A in the upcoming…

A: Given that, 3/25 of people asked preferred candidate A. The total people asked in election is…

Q: An industrial/organizational psychologist wants to improve worker productivity for a client firm,…

A: The summary of statistics is, The degree of freedom is, Critical value:   Using the t-table, the…

Q: Suppose that in a survey of five-year-olds, 45% liked the letter A, 54% liked the letter B, and 50%…

A:

Q: For its “Music 360" survey, Nielsen Co. asked teenagers and adults how each group has listened to…

A: Given: n=10p=0.35

Q: On a casual day it was found that 12% of the learners wore their favourite t-shirts. The remaining…

A:

Q: It's all about COMBINATION - From a population of 50 households, in how many ways can a researcher…

A: The population is given as 50 and 10 need to be selected. The total number of ways of selecting 10…

Q: Suppose that in a survey of five-year-olds, 42% liked the letter A, 54% liked the letter B, and 47%…

A:

Q: Suppose that in a survey of five year olds, 45% liked the letter A, 51% liked the letter B, and 48%…

A: It is given that, in a survey of five year olds, 45% liked the letter A, 51% liked the letter B, and…

Q: At a football game, 40 fans were randomly surveyed. Of the sampled fans, 6 named Daren as the best…

A: given out of 40 fans, 6 fans  named Daren as the best player to find from 12000 fans how many say…

Q: la survey, 200 shoppers were asked whether they have access to a computer at home and if they have a…

A:

Q: As part of a statistics project, a teacher brings a bag of marbles containing 700 white marbles and…

A: Given data: Bag of marbles containing 700 white marbles and 300 red marbles

Q: As part of a sixth-grade class project the teacher brings to class a large jar containing 200…

A:

Matrices

‘Matrices’ is the plural form of the word matrix, and it is basically a spreadsheet in the form of a box. In mathematics, various functions can be carried out with matrices. Generally, a matrix comes in the shape of a square or rectangle. The elements are distributed horizontally in the form of rows, and vertically in the form of columns.