You and a friend are interested in knowing if two groups have the same proportion of smokers. The first group of n = 500 consist of 490 smokers. The second group of n = 500 has 400 smokers. The overall proportion of smokers in both groups is .89 (89%). You want to know whether the proportions of smokers are the same in the two groups of individuals. Based on a 95% confidence level, after hypothesis testing, what would you tell your friend? Would the null hypothesis reject H0 or fail to reject H0?

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: GIVEN DATA,  n=971x=554P^=Xn=554971=0.5705CI=0.99α=1-0.99=0.01we have to find out the confidence…

Q: A local college recently made the news by offering foreign language-speaking dorms to its students.…

A: Given observed frequency(O) table : Expected frequencies and Test statistics can be calculated as…

Q: A statistics teacher has a large container of beads that she says contains 60% blue beads. A student…

A:

Q: In fall 2014, 34% of applicants with a Math SAT of 700 or more were admitted by a certain…

A: Let A be the event that student had Math SAT of 700 or more Therefore, PA=0.36 find The probability…

Q: need help with part D

A: Sample sizes n1=594 ,n2=506Favorable cases x1=363 ,x2=325Significance level (α) = 0.01Now,p̂1 =…

Q: The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random.…

A: From the provided information,

Q: Belief in Haunted Places A random sample of 280 college students were asked if they believed that…

A: Answer below

Q: Suppose we would like to know the difference between the true proportion of females and males who…

A: The z- test for two sample proportions can be defined as a statistical technique that can be used to…

Q: State whether you think the difference between what occurred and what you would expect by chance is…

A: Statistical significance Statistical significance is the statement that the results of a collection…

Q: Suppose that 75% of college students prefer pepperoni on their pizzas. You took a sample of ?=150 at…

A:

Q: On a multiple choice test with 25 questions, each question has four possible answen is correct. For…

A: We have to find mean  of correct answerfor given data ...

Q: I love to make copies; who doesn't? There is a 70% chance that I am the first one in the copy room.…

A: Given data: The given probability that I am the first one in the copy room is P(A)=70%=0.70. The…

Q: 7. TECHNOLOGY For a business report on technology use, Damell asks a random sample of 72 shoppers…

A: Given:     Own a tablet computer Do not own a tablet computer Total Own smart phone 9 42 51…

Q: Historically, about 59% of the population of a certain country believed that the planet's…

A:

Q: A survey asked 3494 randomly selected high school seniors about their computer use. Among the 1,734…

A: We have given that,  Favorable cases (males use computers for three or more hours a day) = (X) = 677…

Q: A recent survey found that 58% of U.S. adults use their smartphones to research and shop for…

A: The expression is  The margin of error is given as 5.3%.

Q: µ = 43 and s = 8, what is the z score ? Margret X = 43, z = Katie X = 55, z = Dorinda X = 47, z =…

A: Given that  µ = 43 and s = 8 Formula for Z-score  Z=(X-µ)/s

Q: You are taking a 10 question multiple-choice test. If each question has four choices and you guess…

A: Given Data Probability of success,p =1/4 =  0.25 Probability of failure,q=(1- 0.25 )=…

Q: In fall 2014, 36% of applicants with a Math SAT of 700 or more were admitted by a certain…

A:

Q: Suppose that a test for presence of a disease is 87.5% accurate. Within a sample of 3200 patients,…

A: (1)   From the given information,   The incidence rate of disease = 14% The accuracy of test =…

Q: The proportion of each colored marble is shown in the table. Suppose you draw two marbles one after…

A:

Q: 2. In an experiment to examine the relationship between heart disease and the place of life, the…

A: In an experiment to examine the relationship between heart disease and the place of life, the given…

Q: Use the following information to answer the next five exercises. A doctor wants to know if a blood…

A: The question is based on a hypo. testing of a paired data set Given :

Q: a teacher that historically 85% of students in the class will want to local zoo. The teacher…

A:

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A:

Q: The test for a certain disease is 86% accurate.  A hospital tests a sample of 5000 patients for this…

A: Accuracy of the test is 86% Inaccuracy of the test = 14% N = Total number of patients = 5000…

Q: pose that 45% of people nationwide support capital punishment. If we take a sample from the…

A: 45% of people nationwide support capital punishment. Sample proportion is  p = 0.45

Q: A popular blog reports that 45% of college students log in to Instagram on a daily basis. The Dean…

A: Given that:Sample size, Number of students logging in daily (Number of favorable cases), Level of…

Q: You are to play a game of chess against a random opponent on the web. You say to yourself "There is…

A: Probability of winning=75%

Q: he preeminent basketball philosopher Rasheed Wallace popularized the phrase, "Ball don't Lie." This…

A: p = 0.785 n = 177

Q: Write both the null and alternative hypothesis. Using the correct notation The proportion of…

A: Null Hypothesis (H0):It's an assertion regarding the population which is assumed to be true or is…

Q: Test the claim that the proportion of people that own lawn mowers is more than 59%. If you fail to…

A:

Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll,…

A: It is given that x = 556n = 914Confidence level = 95%

Q: Suppose the probability of success is p=31%p=31%. What is the probability of 77 successes in 88…

A: Binomial distribution: A discrete r.v. X taking values 0,1,2,3, …., n is said to follow a binomial…

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 July 2004, Gallup Poll asked 1005 US adults if they actively try to avoid carbohydrates in their…

A: From the given data  Which test should you use?

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: (SR 7.19) According to a Gallup poll, 63% of concession stand workers like the smell of their…

A: Here use normal approximation because sample size is too large

Q: Suppose that 66% of people have dogs. If two people are randomly chosen, what is the probability…

A: 66% of people have dogs. Sample size = 2P(both have a dog) = ?

Q: Test whether there is a difference between two groups in the proportion who voted, if 45 out of a…

A: Assume that p1, p2 are the population proportions of who voted, in Group 1 and Group 2,…

Q: A city has 4 voting districts. Records from previous years show the proportion of registered voters…

A: The chi square χ2 test statistic is used to compare the proportions among the two (or) more…

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.