Example 3. A certain company's customers is made up of 43% women and 57% men. An aggressive marketing campaign results in an increase of women customers to 46%, according to a sample survey of 50 customers. If the company hadn't run the campaign, how likely is it that 46% of customers are women? Was the campaign worth it?

Q: What percent of the department faculty have less than 25 years of service? Answer:  % (b) If a…

A: From the given histogram we need to answer certain questions.

Q: Dialysis In a study of dialysis, researchers found that “ofthe three patients who were currently on…

A: The data represents dialysis study in which the researchers found that three patients suffered from…

Q: An auto shop wants to examine the proportion of customers that have to return after an appointment.…

A:

Q: Good City Problem In 1990, a study revealed that 72% of residents in a particular city felt the city…

A:

Q: Childhood obesity: A national health survey weighed a sample of 532 boys aged 6-11 and found that 89…

A:

Q: 4. Suppose the population size N = 5,000 In 2008 the Better Business Bureau settled 75% of…

A:

Q: A searcher is interested in if there is a relationship between whether a student enjoys mathematics…

A: Given: α=0.025 The observed values are given as   Maths: Yes  Maths: No Total Stats: Yes  70 49…

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

A: According to the given information in this question, there are more than three subparts according to…

Q: There are 250 students in a class. (A) James is ranked 20th in the class. What is James’ percentile…

A:

Q: A auto shop wants to examine the proportion of customers that have to return after an appointment.…

A: Given information- We have given that an Auto shop wants to examine the proportion of customers that…

Q: What's the IQV? Answer with TWO decimal digits.

A: Categories : { 1,2,3,4 } Frequency : { 1220,1563,716,590 } Percentage : { 29.8% , 38.2% , 17.5% ,…

Q: Español A decade-old study found that the proportion, p, of high school seniors who believed that…

A: Given : Hypotheses test is a two tailed test test statistic, z = -2.951

Q: A random sample of n, = 154 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 11…

A: Given Information: Sample 1: Sample size n1=154 x1=11 Sample 2: n2=131 x2=7 (a) Level of…

Q: An online retailer conducts a random survey of its customers. The survey shows that 80% of the…

A:

Q: Are our kids getting taller? The average height of kindergartners in 1950 was 39.5 in. The data…

A: From the given information, The average height of kindergartens in 1950 was 39.5. The sample data is…

Q: The boxplot below shows salaries for CPAS and Actuaries in a town. CPA HO Actuary 30 40 50 60 70…

A:

Q: e) Determine the P-value A At a = 0.05, what is your conclusion? Explain in context of the problem.…

A: Solution: Given information: n=500 Sample size x= 59 successes p^=xn=59500=0.118 Sample  proportion…

Q: The final answer for the test statistic from technology is as follows: Round to 2 decimal places. t…

A: In 1999, the average percentage of women who received prenatal care per country was 80.1%. want to…

Q: The boxplot below shows salaries for Construction workers and Teachers. Construction Teacher 23 24…

A: Consider the box plot in the following format:A horizontal box plot extends from the minimum to the…

Q: In 2008 the Better Business Bureau settled 75% of complaints it received (USA Today, March 2, 2009).…

A: In part b), sample size is 450. In part d), sample size is 200.

Q: Colin is a student in a consumer mathematics class creating a report on the annual interest rates of…

A: Using excel, the required z-score for each type of bank can be calculated as; 1. Enter the data into…

Q: What's the mean? Answer with ONE decimal digit.

A: Given frequency distribution table…

Q: At a soccer tryout, a new player claims to make 70% of penalty shots. The team manager asks them to…

A: Artificial Intelligence (AI) has revolutionized the way we interact with technology and the world…

Q: A biology professor claims that, on the average, 15% of her students get a grade of A, 25% get a B,…

A: The number of categories k is 5.

Q: The City of Windsor Department of Parks and Recreation is planning to build a recreation centre in…

A: The given table shows the percentages of people who expressed interest in various activities.

Q: III. The Big Smiles Portrait Studio is conducting a survey among their clients. One of the questions…

A: Question III)The sample size is .The proportion of clients who answer yes is .

Q: The 137 horses in a study on enteroliths, a type of stone in the gut, were housed either in a small…

A: The bar chart of count corresponding to large paddock, small paddock, stall or a grass pasture is…

Q: There are three major companies who manufacture gaming consoles. The table below shows that market…

A: Given :

Q: 61.9% O 26.9% O 45.2%

A: Given, sample size(n)  = number of women in the study  = 650 175 out of 650 women said that they…

Q: . Global Warming The Pew Research Center for thePeople and the Press (http://people-press.org) has…

A:

Q: What percentage ) What percentage of the people do not smoke? of the people do not exercise…

A: The data is given by   Smoke Do not smoke Total Exercise regularly 4 21 25 Do not exercise…

Q: America OnLine published a survey question. Among the 2,300 Internet users who responded, 20%…

A: From the given information, America OnLine published a survey question. Among the 2,300 Internet…

Q: In politics, marketing, etc. we often want to estimate a percentage or proportion p. One calculation…

A: Here the proportion of people liking dark chocolate is 37% with a margin of error 2.5%  So, the…

Q: The following is based on information from The Wolf in the Southwest: The Making of an Endangered…

A: Population proportion = p₀ = 0.5 Sample number of events = x =11 Sample size = n =37 Sample…

Q: A school knows that 38% of its incoming students own a smart phone and a tablet. What percent of…

A: Let S be the set of students with smartphone and T be the set of students with tablet Percentage of…

Q: What is the relationship between the attendance at a major league ball game and the total number of…

A: Given

Q: t is assumed that the proportion of households that have three telephone numbers is 30%. A company…

A: Given : It is assumed that the proportion of households that have three telephone no. is 30% i.e p =…

Q: 2. Professional sports teams sometimes "black out" home games on local television to encourage…

A: Solution : (2) According to given problem, The hypothesis are : H0 : Proportion of motivated fan to…

Q: A company uses an automated process in checking for defective electronic devices that they…

A: Given, A company uses an automated process in checking for defective electronic devices that they…