National Sporting Goods Association found that 34% of Americans surveyed had gone swimming during the year. Assuming that the survey included a simple random sample of 1200 persons, construct a 95% confidence interval for the population proportion of Americans who went swimming during the year.

Q: Identify the t -scores for a 90% confidence interval if the sample size is 25?

A: Givensample size(z)=25α=1-0.90=0.10α2=0.05

Q: A 95% confidence interval computed from a sample of size 50 will have a greater margin of error than…

A: A 95% confidence interval computed from a sample of size 50 will have a greater margin of error than…

Q: In a random sample on 200 airline passengers, 84 said they would like a window seat. What is the…

A: 1. The point estimate for the proportion of passengers wishing a window seat is, p^=xn=84200=0.42…

Q: When 460 junior college students were surveyed, 100 said they have a passport. Construct a 95%…

A: Given that there are 460 junior college students and 100 said they have a passport. That is, n=460…

Q: nternet service: An Internet service provider sampled  538  customers and found that  78  of them…

A: Given: Sample size (n) = 538 78 of them experienced an interruption in high-speed service during the…

Q: Using the sample paired data below, construct a 95% confidence interval for the population mean of…

A: The difference is, x y Difference(x-y) 5.1 4.7 0.4 5.0 3.9 1.1 4.6 4.1 0.5 3.5 4.2 -0.7…

Q: 17 out of 36 American adults responded "yes" when asked if they have ever voted for a candidate in a…

A: From the given information,   17 out of 36 American adults responded "yes" when asked if they have…

Q: A smart phone manufacturer wants to find out what proportion of its customers are dissatisfied with…

A: Given that - A smart phone manufacturer wants to find out what proportion of its customers are…

Q: We surveyed 53 people in an attempt to determine the proportion of Americans who lease a vehicle. 13…

A: The proportion of sample Americans who lease a vehicle is, Thus, the proportion of sample Americans…

Q: A Harris Poll survey of smokers in which 805 of a sample of 993 smokers agreed that smoking would…

A: Given: x=805n=993α=0.01

Q: A medical director needs to know the proportion of patients who have a single bed in their room. A…

A: It is given that sample size (n) is 200 and p-hat value is 0.59.

Q: Out of a sample of 500 high school students, 376 said they would prefer to have computers in every…

A: Given that x=number of people who prefer to have computers= 376 n=sample size= 500 So the point…

Q: Construct a 95% confidence interval for the difference between population proportion of voters in…

A:

Q: n a survey of 2480 golfers, 372 said they were left-handed. Construct a 92% confidence interval for…

A: The given data is appropriate for single proportion confidence interval . because it is a large…

Q: A large trucking company wants to estimate the proportion of its trailer truck population with…

A: Solution: From the given information, n=200, p-hat is 0.30 and the confidence level is 0.90.

Q: Out of a sample of 1,450 people, 1,000 said they prefer to drive themselves to work rather than…

A: Given Data: x=1000 n=1450   p^=10001450=0.6897   z-value corresponding to 95% Confidence…

Q: perimental treatments or medicines. The sample consisted of 1220 adult Internet users, and…

A: The value of z at 95% confidence level is 1.96, which can be found by using the standard normal…

Q: search for the Ford Motor Company, you find that a random sample of 800 households includes 721 in…

A: At 98% confidence level, the z value is 2.33 which can be obtained by using the standard normal…

Q: If is a sample that is used to estimate a population proportion p. What is the 99% confidence…

A: Given  Sample size n=112 and proportion of success p= 0.598

Q: The Okeechobee County Economic Development Board needs to estimate the proportion of all county…

A: It is given that 10.5% of the county residents in each sample have earned at least a bachelor's…

Q: An internet service provider sampled 1000 of its customers, 189 of them experienced an interruption…

A: It is given that sample size (n) is 1000 and x is 189.

Q: must prove that it has more than 25% of the viewing audience after its initial 13-week run in order…

A: The value of z at 99% confidence level is 2.575, which can be found by using the standard normal…

Q: An online seller of Yema Cake, surveyed several customers. Fifty-two percent (52%) of the customers…

A:

Q: From a sample of 2412 Jawas, 1013 said they had recently sold a stolen droid to a moisture farmer.…

A: We want to find the 99%CI for population proportion (p) Given  X=1013, n=2412 ɑ=0.01

Q: A survey of 927 voters in one state reveals that 537 fever approval of an issue before the…

A: We have given that,  Favorable cases (X) = 537 and sample size (n) = 927 Then, We will find the 95%…

Q: An internet service provider sampled 540 customers and found that 55 of them experienced an…

A:

Q: Out of a sample of 1,450 people, 1,000 said they prefer to drive themselves to work rather than…

A:

Q: A store randomly samples 603 shoppers over the course of a year and finds that 142 of them made…

A:

Q: A federal report indicated that 29 out of 57 children ages 2 to 5 years had a good diet—an increase…

A: Given data, n=57 x=29 The sample proportion is calculated as follows:  p=xn   =2957   =0.5088 The…

Q: he manager of the dairy section of a large supermarket took a random sample of 250 egg cartons and…

A: Given : The manager of the dairy section of a large supermarket took a random sample of 250 egg…

Q: A survey of 50 students in grades 4 through 12 found 66%have classroom Wi-Fi access. Find the 99%…

A: The sample proportion is : p=0.66 The sample size is :n=50 The formula for testing the population…

Q: Construct a 95% confidence interval for the population proportion of students who graduate within…

A: The sample size is n = 400 And the number of students who graduate within six years, X = 108 The…

Q: The American Heart Association is about to conduct in anti smoking campaign and wants to know the…

A: Solution: Out of a sample of 1421 Americans over 35, 412 smoke.  Sample size: n = 1421 The number of…

Q: a. Construct a 90​% confidence interval to estimate of the percentage of yellow peas. b. It was…

A: Let x1 be the number of yellow peas=164 x2 be the number of green peas=441

Q: Assume a nationwide random survey of 800 adults asked about attitudes toward “alternative medicine”…

A: We have given that,  Sample size (n) = 800 and Favorable cases (X) =448 Then,  We will find the 99%…

Q: n a trial of 350 patients who received 10-mg doses of a drug daily, 49 reported headache as a side…

A: 350 patients who received 10-mg doses of a drug daily; n=350 49 reported headache as a side effect;…

Q: In a study of the relationship between alcohol use and bicycling fatalities, the researcher…

A:

Q: n a recent Zogby International Poll, nine of 48 respondents rated the likelihood of a terrorist…

A: Given that : x = 9 n = 48

Q: Out of 350 people sampled, 263 had kids. Based on this, construct a 95% confidence interval for the…

A: It is given that the sample size (n) is 350 and x is 263.

Q: 11th - It was observed that 30 out of 100 randomly selected students smoked. Estimate the 95%…

A: we associate with the interval estimate is called confidence interval. This probability indicates…

Q: Give a 95​% confidence interval for the true proportion of those from their entire mailing list who…

A: Given,Sample size (n)=1,00,000No. of donotions recived (r)=4887Proportion P^=xr=48871,00,000=0.04887…

Q: A sample of part time students are asked how many hours per week they work on a job. For the…

A: There are only 5 values in the sample data. Scores: 18 13 12 15 12

Q: A company that has many department stores in the southern states wanted to find at two such stores…

A: The provided information is  n1=800x1=280n2=900x2=279The proportions…

Q: genetic experiment with peas resulted in one sample of offspring that consisted of 447 green peas…

A: Given Sample size n=447+169=616 X=169

Q: 2) Suppose a college is planning to hold an event for students. In the survey of 130 on-campus…

A:

Q: Construct a 99% confidence interval for the proportion of all motorbike license applications that…

A: We want to find the 99% confidence interval  Given  X=20 , n=175

Q: A random sample of 25 statistics students was asked: “Have you smoked a cigarette in the past week?"…

A: Given that  Random sample size(n) = 25 Students reported smoking within the past week (X) =6…

Q: Flagstaff found 470 NAU students who drink coffee daily. Find a 95% confidence interval for the true…

A: Given

Q: genetic experiment with peas resulted in one sample of offspring that consisted of 417green peas…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.