19. 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: Among students at a nearby college, the proportion who say they're interested in their congressional…

A: Given : n=275 , X=210 , p0=0.75 , α=0.05 Here , we want to test the claim that the proportion at the…

Q: 19) A manufacturer of golf equipment wishes to estimate the number of left- handed golfers. How…

A: We have find confident proportion. .

Q: $3.25 in dimes and nickels, were distributed among 45 boys.  If each received one coin, how many…

A: It is given that, $3.25 (in dimes and nickels) are distributed among 45 boys.

Q: In a survey of 52 students in the cafeteria, it was found that 15 were commuters. If one-quarter of…

A: Let there were x females and y males. So, x+y=52   Given that one-quarter of the female students and…

Q: c. How many of 45 randomly selected employees have a personal messaging frequency less than 170? d.…

A:

Q: Suppose you try to conduct a presidential approval poll of 10,000 likely U.S. voters. You know that…

A: Answer:----.                 Date:----9/10/2021

Q: Suppose you try to conduct a presidential approval poll of 5,000 likely u.s voters you know that 25%…

A: Given Total number of voters=5000

Q: Nationally, 83% of Americans have earned a high school diploma.  We want to see if the proportion of…

A: We have to find sample proportion.

Q: 2. A manager samples the receipts of every fifth person who goes through the line. Out of 50 people,…

A: Given that, No.of people had a mispriced items = 4 Total no.of peoples = 50 The probability that…

Q: ii. If Olivia wants to learn a foreign language to get an idea of how satisfied other students were…

A: iii. Stratified sampling: In stratified sampling the whole population is divided into two or more…

Q: In a​ poll, 1,001 men in a country were asked whether they favor or oppose the use of​ "federal tax…

A: The population in the given​ problem C. All men in the country

Q: 2. How many different letter arrangements can be made from the letters in the word of STATISTICS?

A: Number of letters in the word STATISTICS = 10 Number of S's = 3 Number of T's = 3 Number of I's = 2…

Q: Among students at a nearby college, the proportion who say they're interested in their congressional…

A: Since you have posted multiple subparts of a question we will do only first three subparts as per…

Q: 5. Several college students are surveyed about their college location and preferred locations for a…

A: Given  total number of students who prefer beach are 91. Total number of students who prefer skiing…

Q: Suppose a marketing company did do a survey. They randomly surveyed 200 households and found that in…

A: Given data, n=200 x=120 Population proportion p=?

Q: Suppose your population of interest is all University of Wisconsin Whitewater students. What might…

A: Population is the set of all objects of interest while a sample is a subset of the population. It is…

Q: 4) 57% of kids can't wait for spring break. How many kids on average would we need to survey to find…

A: Geometric Distribution: Let us assume there is a sequence of trials, each having two outcomes, say…

Q: 2. A hot topic of debate is whether the legal driving age should be raised to eighteen. From a…

A:

Q: Among a group of people, 57% liked purple, 12% liked yellow and 9% liked blue. 7% liked both purple…

A: Percentage of People that liked Purple: 57% Percentage of People that liked Yellow: 12% Percentage…

Q: In a recent small survey of airline passengers, 27 said they had flown American in the last year, 23…

A: We will use  Addition theorem for  3 set

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: 7. ( ) Suppose that, in a suburb of 12,235 people, 6,418 people moved there within the last five…

A: Formula : * Population proportion  p = X/N *sample proportion p̂= x/n

Q: 4. A private opinion poll is conducted for a politician to determine what proportion of the…

A:

Q: 3. A light bulb manufacturer finds that 4% of the bulbs it makes are defective. The quality control…

A: We will calculate percentage of 700 out of 15500 if it becomes 4% then we can agree.

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 union’s executive conducted a survey of its members to determine what the members felt the…

A: A- Job security  B- Pension benefits ___________________ Given, P(A) = 0.74 , P(B)= 0.65 , P(A|B) =…

Q: A researcher surveyed 80 randomly selected Certified Public Accountants in each of the cities in…

A: The 2*4 contingency table is given. There are two categorical variables are Free Work and Cities. We…

Q: re residents (if any) must I ask, given the fact that (somehow) I know that 62 percent of all…

A: Given: Sample size, n = 32 Probability, p = 62100=0.62 Here the distribution is binomial and for a…

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

A: Given that P(liked letter A)=45%=0.45 P(liked letter B)=51%=0.51 P(liked letter C)=48%=0.48 P(liked…

Q: 14) A reporter claims that less than one in four Americans believe that Facebook acted…

A: Given: Sample size, n is 1280 The number of respondents believed that Facebook act inappropriately,…

Q: In the Aloha state, you are very unlikely to be murdered! However, it is considerably more likely…

A: Given that, The following numbers represent the crime rates per 100,000 population in Hawaii:…

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: A polling organization contacts 1581 teenagers who are 16 to 19 years of age and live in North…

A: Population:   It is nothing but it is interest of set of all the objects or individual’s interest.…

Q: At a certain college 40% of the students are male, and of those, 15% smoke cigarettes. What is the…

A: Given in a college percentage of male = 40%Among males percentage of smokers = 15%.we can say…

Q: In a sample of 310 people, 186 completed only high school, 24 completed only some college, 93…

A: Given data A sample of 310 people is given. 186 completed only high school. 24 completed only some…

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: 3. If there are six candidates, how many comparisons should be made?

A: As per our guidelines we are supposed to answer only one question.Kindly repost other question as…

Q: In a random sample of 120 killer bees, how many would you expect to be agitated by the color GREEN?…

A: Number of killer bees are expected to be agitated by color green = (% of bees agitated by color…

Q: A conservative radio talk show host with a large audience is interested in the proportion p of…

A: Part a: A conservative radio talk show host with a large audience is interested in the proportion p…

Q: Thirty two percent of all americans drink bottled water more than once a week (national resources…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

Q: In the Aloha State, you are very unlikely to be murdered! However, it is considerably more likely…

A:

Q: found that 65% of Florida voters support stricter gun laws. There are approximately 13 million…

A:

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

A:

Q: 2. An official at FEMA (the Federal Emergency Management Agency) wants to determine if they should…

A: Hypothesis testing: Hypothesis testing is used to verify enough statistical evidence in favor of the…

Q: (6) A student surveys some students on campus in the evening and finds that 16 out of 20 of the…

A: Since you have posted more than one question Incan answer only first question at this time. Please…

Q: Suppose you try to conduct a presidential approval poll of 5,000 likely U.S. voters. You know that…

A: Hi! Thank you for the question, As per the honour code, we are allowed to answer three sub-parts at…

Q: Suppose you try to conduct a presidential approval poll of 10,000 likely U.S. voters. You know that…

A: Here given : 10,000 voters approval poll. 44% :independent  party  28%: reform Party  23%: green…

Q: 4. How many cards must you pick from a standard 52-card deck to be sure of getting at least 1 red…

A: Explanation:in this given 52 cards deck asking why  In step2 explanation will there

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

A:

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.