Hypotheses For each of the following, write out the nulland alternative hypotheses, being sure to state whetherthe alternative is one-sided or two-sided.a) A company knows that last year 40% of its reports inaccounting were on time. Using a random sample thisyear, it wants to see if that proportion has changed.b) Last year, 42% of the employees enrolled in at least one wellness class at the company’s site. Using a sur-vey, it wants to see whether a greater percentage is planning to take a wellness class this year.c) A political candidate wants to know from recent pollsif she’s going to garner a majority of votes in nextweek’s election.

Q: In statistical comparisons, a p-value represents the likelihood that an observation was merely due…

A: This question is asking us to examine Table 1 in a research article and determine which…

Q: A 2016 Pew Research poll found that 18% of cell phone owners use their phone for conducting…

A: It is given that the total number of cell phone uses are 18%, thus the population proportion is…

Q: Suppose a target population is unimodal and right skewed and a sample is collected from this…

A: It is given that the statement about to the right skewed population. Here, need to find out the…

Q: Gallup is a polling company that aims to make predictions about American opinions.  From August…

A: The statistic is a function of sample values only. And parameter is based on population values.…

Q: A company surveyed adult Americans about their consumer debt. The article reported that 48% of…

A: Given Solution:

Q: practice question #1. A candidate running for office next year wants to know what proportion of…

A: Hypothesis is an assumtion that is being tested.

Q: Toastmasters International cites a February 2001 report by Gallup Poll that 40% of Americans fear…

A:

Q: Refer to Exercise 6.6 on p. 215 in the 4th edition of OpenIntro Statistics. Instead of doing the two…

A: Given that, The Marist Poll published a report stating that 66% of adults nationality think licensed…

Q: The Bangor Humane Society tracks cat adoptions closely, and in the past has seen 60% of people who…

A: We know if we have sample size n and number of success is X then, proportion of success is    p^ =…

Q: What are the hypotheses to determine whether a population mean exceeds 942?

A: Given that  Population mean μ =942 NOTE:- According to bartleby guidelines expert can solve only one…

Q: Suppose you are interested in testing whether the mean earnings of men in the General Social Survey…

A:

Q: With double-digit annual percentage increases in the cost of health insurance, more and more workers…

A: Given that, Sample data are reported for 50 employees of small companies, 75 emplyees of medium…

Q: Why is a sample often a better way to obtain information about a population than a census? A. A…

A: Census:- In census,we collect our survey data from entire population.   Sample :- In sample ,we…

Q: Gallup surveyed adult Americans about their consumer debt. They Reported that 47% of millennials and…

A: Given information: Proportion of millennials who did not pay off their credit cards p1=0.47…

Q: Which of the following is inferential statistics? 1.  Deal with drawing conclusions and/or making…

A: Inferential statistics deals with making inference about a population using sample. Inferential…

Q: Step 1: State the 2 hypotheses Step 2: Select the distribution and specify the a-value.…

A:

Q: Some people are concerned that new tougher standards and high-stakes tests adopted in many states…

A: Given : x = 210 n = 1782 Hypothesis : H0 : p ≤ 0.103 Ha : p > 0.103 p^ = 2101782 p^ = 0.1178 sp^…

Q: A carnival game is designed so that approximately 10% of players will win a large prize. If there is…

A: Solution: Given n= 100 Sample size  p= 0.10 Population proportion.  The condition or assumption for…

Q: Answer the following problems and explain your answers for better understanding.

A: Before we start, let's understand the difference between descriptive and inferential statistics.…

Q: A company surveyed adult Americans about their consumer debt. The article reported that 48% of…

A: Solution-:Let, p_1-be the proportion of Gen Xers who do not pay off their credit cards each monthand…

Q: in waste em to have an unusually high occurrence of cancer. FBI agent Megan Reeves believes that…

A: Given Information: Consider the given data: State Cancer Cases Connecticut 268 Maine 291…

Q: You may need to use the appropriate appendix table or technology to answer this question. Fewer…

A: For the year A, sample proportion: sample size: For the year B, sample proportion: sample size:

Q: 1.     Your professor has told you that 60% of the people who take introductory statistics go…

A: a. One sample proportion test should be used.

Q: Social networking is becoming more and more popular around the world. Pew Research Center used a…

A: Introduction: Denote p1, p2, p3, and p4 as the true proportions of adults using social networking…

Q: A two-way analysis of variance involves

A: It is given that the statement about to the two-way analysis of variance. Here, need to find out the…

Q: Twittering away The Pew Internet and American Life Project asked a random sample of 2253 U.S.…

A: Given Information: Sample size n=2253 Sample proportion p^=0.19

Q: After reading an article using research done by the Organization for Economic Co-operation and…

A: The 95% confidence interval for p is (0.25, 0.32).

Q: You are at a meeting for student leaders on campus and you hear Dr. Lindsay say that 64% of…

A:

Q: 2. You have following observations -1.5, 2.6, 1.2, -2.1, 0.1, 0.9. Find a sample mean, a = variance,…

A: x (x-xbar)^2 -1.5 2.89 2.6 5.76 1.2 1 -2.1 5.29 0.1 0.01 0.9 0.49

Q: If the original claim is "The majority of student population are full time students.", then this is…

A: Proportion: The percentage of a population that falls into a certain category has been referred to…

Q: Because of this, the psychologist who created the program believes the proportion, p, if all married…

A:

Q: Suppose we have the results of a Gallup survey (simple random sampling) which asks participants for…

A:

Q: A company surveyed adult Americans about their consumer debt. The article reported that 48% of…

A: Solution-: Let, p_1-be the proportion of Gen Xers who do not pay off their credit cards each month…

Q: Professional athletes are threatening to strike because they claim that they are underpaid. The team…

A: The owners have reported the average value, whereas the players have reported the individual median…

Q: a.     What statistical test will you use to test this data ?   b.     State the null and…

A: From provided information it is claimed that, women’s movement has resulted in an increase in the…

Q: The proportion of commuters on is purported to be 65%. A professor believes this to be inaccurate.…

A: 1

Q: Four scenarios of statistical studies are given below. Decide which study uses a population…

A:

Q: You own a call centre that sells appliances (such as fridges, washing machines, televisions, small…

A: Call Center dealing with Electronic appliances is very well directly linked with the season and the…

Q: There are several possible explanations for the existence of a statistical relationship between two…

A: The existence of a statistical relationship between two variables can be due to several factors that…

Q: a. What is the test statistic?  b. What is the p-value? (Round your answer to four decimal places.)…

A: a. The claim of the test is hat 60 percent of the students who take her Elementary Statistics class…

Q: One of the more popular statistics reported in the media is the​ president's job approval rating.…

A: As per the informationProportion of the population who approve of the job that the sitting president…

Q: Government data shows that 11% of the population is victimized by property crime each year.  A…

A:

Q: What would be your decision? A. There is insufficient data to make a decision. B. do not reject the…

A: Given: Sample size(n)=25Sample mean(x¯)=244sample standard deviation(s)=24.5population mean(μ)=220

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.