Construct both a 90% and a 99% confidence interval for B1. = 42, s = 8.8, SSpx = 64, n = 19 < B1 s 90% : 99% : < B1 <

Q: 1. Customers randomly selected at a grocery store included 172 women and 45 men. 74 of the women and…

A: Given: Number of women (n1) = 172 Number of men (n2) = 45 Number of women used coupons (x1) = 74…

Q: A sample of 28 was taken from a population, and r = .45. What is the 95% confidence interval for the…

A: Correlation coefficient: Correlation analysis is used to measure strength of the association between…

Q: Of 363 randomly selected medical students, 20 said that they planned to work in a rural community.…

A:

Q: If n=340 and p (p-hat) = 0.58, construct a 95% confidence interval. Give your answers to three…

A: From the provided information, Sample size (n) = 340 Sample proportion (p̂) = 0.58 Confidence level…

Q: A research group studying cell phone habits asked the question “Do you ever use your cell phone to…

A:

Q: It was observed that 4 out of 10 randomly selected students went to the cinema. Find the 95%…

A:

Q: A random survey of 495 adults found that 59 had diabetes. Which of the following is a 98% confidence…

A:

Q: In a random sample of 810 women employees, it is found that 81 would prefer working for a female…

A:

Q: Two random samples have sizes of 50 and 25. Which of the following is true for a 99% confidence…

A: Given that  Random sample sizes (n1) = 50  and (n2) = 25 Confidence level (C) = 99%    We know that…

Q: In a sample of 100,40 said they preferred Pepsi to Coke. A 95% confidence interval for the…

A:

Q: A Gallup poll of 1001 Americans age 18 and over conducted in May of 2013 found that 80% of the…

A: Confidence Interval: Confidence interval is the interval estimate of the population parameter. It is…

Q: Determine the point estimate of the population mean and margin of error for the confidence interval…

A: From the given information, we have  The lower and upper bounds of the confidence interval is, 22and…

Q: In a random sample of 850​ Americans, 385 reported that they work two jobs. Which of the following…

A: The known values are, The sample proportion is,

Q: n a survey of 2000 American adults age 60 and over, 1320 received a flu shot. Construct a 90%…

A: Given , n =2000 X=1320 P=x/mn =1320/2000  =0.66 E-value at 90% coincidence is 7c=1.645

Q: In a Gallup Poll of 1005 individuals, 452 thought they were better off financially than a year ago.…

A: Given; p=452n=1005 95% confidence interval is given by- p^±z×p^(1-p^)n true proportion is given as-…

Q: Kim wants to determine a 80 % confidence interval for the true proportion ? of high school students…

A:

Q: In a sample of 100, 40 said they preferred Pepsi to coke. A 95% confidence interval for the…

A:

Q: Identify the t-score for a 90% confidence interval if the sample size is 25. t = The answer isnt…

A: We have given that Confidence level (c) = 90% = 0.90 Significance level (α) = 1 - c = 1 - 0.90 =…

Q: A sample of 14 commuters in Cebu showed the average of the commuting times was 33.2 minutes. If the…

A: GivenSample size (n) = 14SD(s) = 8.3 minutesaverage (x) = 33.2 minutes 95% confidence interval.…

Q: The researcher rejected the null hypothesis at the 95% confidence level where F(2, 14) = 53.54, p =…

A: F-table  / Technology can be used to find P-value. I am using Excel function,

Q: What is the value of Z for this confidence interval?

A: Given,sample size(n)=14795no.of people who said yes=2219no.of people who said no =12576

Q: A random sample of 560 serviced tables at a restaurant reveals that 20% of them offer tips to the…

A:

Q: Find the tę value for a 98% confidence interval when the sample size is 17. a. tę (negative value…

A: As per our guidelines, we can solve only the first question. Kindly repost the other question for…

Q: The value of t for 20 degrees of freedom and a 98% confidence interval is: -2.528 O 1.328 O 2.528 O…

A: The degrees of freedom is df=n-1=20 The confidence interval is 98%. The level of significance is…

Q: The t value for a 95% confidence interval with 24 degrees of freedom is Select one: O 1.711 O 2.492…

A: Givencoonfidence level=95%Degrees of freedom(df)=24

Q: What value of z should be used to calculate a confidence interval with a 95% confidence level?

A: The z value which is used to calculate 95% confidence interval is defined as P(-zvalue &lt; Z &lt;…

Q: 6) An Internet service provider sampled 590 customers and found that 85 of them experienced an…

A: According to the given information, we have Total number of customers = 590 85 of them experienced…

Q: Of 380 randomly selected medical students, 21 said that they planned to work in a rural community.…

A: Note- Here I am taking the sample size as 380 because then only the answer will match with the given…

Q: If n=280 and ˆpp^ = 0.15, construct a 90% confidence interval. Give your anwers to three decimals.

A:

Q: In a random sample of 95 manufacturing firms, 67 indicated that their company attained ISO…

A: For part i]: Linear relationship: 1]The graph of linear relationship forms a straight line.  2] A…

Q: A survey of 800 women shoppers found that 17% of them shop on impulse What is the 98% confidence…

A:

Q: Find and interpret the 95% confidence interval for μ, if ¯y = 70 and s = 10, based on a sample size…

A:

Q: You are doing a class project for Stat 1, and do not have enough money to sample all mobile home…

A: At 95% confidence level, α=0.05 and z=1.96.

Q: A laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 246…

A: Given Information: Sample size (n) = 12 Sample mean (x¯) = 246 Sample standard deviation (s) = 11.7…

Q: According to a study completed in 2006 by Pew Internet, 42% of all Americans had a broadband…

A: The 95% confidence interval for p is (0.439, 0.457).

Q: 3. In a sample of 300 people, 154 said that they watched news on television. Find the 90% confidence…

A: Given : Sample size of people (n) = 300 Let X : No. of people from sample  who said they watched…

Q: d) Provide the appropriate interpretation for the confidence interval.

A:

Q: A poll commissioned by the Center on Addiction and Substance Abuse at Columbia University found that…

A: Given that, X = 1340 N = 2000 98% confidence level

Q: a survey of 472 personnel directors, 63% thought that they would be hiring new personnel over the…

A: The critical value of the confidence level of 98% from standard normal distribution is,

Q: What Z value should be used to calculate a 95% confidence interval? (Use the t table) 1.960 2.576…

A: Given 95% CI

Q: Which of the following conditions is NOT required to construct a 90% confidence interval for u?

A: To estimate population mean, the mean salary of full professors at American colleges and…

Q: (c) A 99% confidence interval from a sample size of 27 observations. 3.054

A: It is given that the sample size is 27 and the confidence level is 0.99.

Q: In a recent study of 42 eighth graders, the mean number of hours per week that they watched…

A: We are required to estimate the interval for the TV watching hours per week from the given sample of…

Q: Suppose you needed to form a 92% confidence interval for a population mean. What z value would you…

A:

Q: create a 90% confidence interval for the following data:  x = 25 n = 100

A: Here we need to construct a 90% confidence interval.

Q: A random sample of married people were asked "would you remarry your spouse if you were given the…

A: Given information x = 127 N = 150

Q: 95% confidence interval for the proportion of college students who have texted during class was…

A: Given that  95% confidence interval=(0.75 , 0.95)

Q: Of 500 randomly selected college students, 200 use a particular brand of mobile phone. Assuming that…

A: Given : x = 200 n = 500 p^=xn=200500=0.4The formula for confidence interval is :p^±zcp^(1-p^)n