In 2000, 58% of females aged 15 and older lived alone, according to the U.S. Census      Bureau. A sociologist tests whether this percentage is different today by conducting a random sample      of 500 females aged 15 and older and finds that 285 are living alone. Is there sufficient      evidence at the α = 0.1 level of significance to conclude the proportion has changed since 2000?

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: According to a Harvard Health Publishing article, the normal body temperature may be  lower than…

A:

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

A: Given Solution:

Q: According to a study conducted by a statistical organization, the proportion of people who are…

A: n=100 p=0.72 The objective is to solve the given questions based on a study conducted by a…

Q: The table below summarizes data from a survey of a sample of women. Using a 0.01significance​ level,…

A: Here it is needed to test, whether the proportions of​ agree/disagree responses are the same for…

Q: student survey was conducted at a major university; data were collected from a random sample of 228…

A: The objective is to identify the most appropriate correlation coefficient and the equation of the…

Q: Read this sample from the report. “In March 2015, 61 percent of workers in private industry had…

A: All categories do not represent industries not surveyed in the report because data points will not…

Q: An article estimated that 80 percent of students at a large public university who are Facebook users…

A: According to the given information in this question, we need to identify the correct option

Q: In one study, the correlation between the educational level of husbands and wives in a certain town…

A: Given that: Sample means of men and women: x¯=y¯=12 Standard deviation of men and women: sx=sy=3…

Q: Previous research showed that 15% percent of teenagers between the ages of 13 and 17 smoke. A study…

A: Given,Population proportion(P)=0.15sample size(n)=785no.of teenagers smoke who has age between 13 to…

Q: Tourism is extremely important to the economy of Florida. Hotel occupancy is an often-reported…

A: The question is about hypo. testing Given : No. of occupied rooms in current year ( x1 ) = 1476…

Q: Tourism is extremely important to the economy of Florida. Hotel occupancy is an often-reported…

A: As per our guidelines we are supposed to answer only 3 sub-parts of any question.

Q: Researchers are interested in whether drinking coffee can improve exam performance for college…

A: As per our guidelines, we are allowed to answer first three sub-parts only. Thanks   a) Here our…

Q: The hypotheses to be tested are : H0:pE= vs Ha:pE<pH, where pE is the proportion of engineering…

A: It is given that For engineering major, sample size n1 = 40, X1 = 20 For humanities major, sample…

Q: The National Highway Traffic Safety Administration requires each U.S. state to carry out an…

A: The objective is to find the required probabilities.

Q: In a previous year, 57% of females aged 15 and older lived alone. A sociologist tests whether this…

A: Given data is appropriate for z-test for single proportion because the sample size is large…

Q: Sleep apnea is a condition in which the sufferers stop breathing momentarily while they are asleep.…

A: Let p be the population proportion  p=5.9%=0.059  Let X be the number of people who suffer from…

Q: State the null and alternative hypothesis as an expression

A: Given that x1=12.5 x2=13.9 s1=3.9 s2=5.2 n1=14 n2=17

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: The 90% confidence interval is from to (Round to three decimal places as needed.)

A: Given,n=400x=32p^=32400=0.08α=1-0.90=0.10α2=0.05 Zc=1.645     (use excel formula =NORM.S.INV(0.90 +…

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 an article about unusual allergies, a doctor explained that allergy to sulfites is usually seen…

A:

Q: Current Year Previous Year Occupied Rooms 1,505 1,411 Total Rooms 1,750 1,700

A: Solution:- from given information x1= 1505     ,n1=1750 x2= 1411     ,n2=1700 null hypothesis…

Q: It has been claimed that at UCLA 43% of all students live on campus. Researcher Ebony Robinson…

A: Given X=112 n=250

Q: According to a study conducted by a statistical organization, the proportion of people who are…

A: The population is the data which includes all the observations that were used for the study. When…

Q: Is there a relationship between autism and what an infant is fed? To determine if there is, a…

A: Solution: The claim is to test if the data provide enough evidence to show that that what an infant…

Q: Recent reports suggest that children who grow up with family members who use drugs are more likely…

A: From the given information we conduct chi squared test.

Q: For the study described below, identify the population parameter and the sample statistic. "As…

A: Given that  As relationships, living arrangements and family life continue to evolve for American…

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: The Vegetarian Resource Group commissioned Harris Poll in 2016 to conduct a nationally…

A:

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: According to a study conducted by a statistical organization, the proportion of people who are…

A: Quantitative variables can be counted or measured, i.e, in this case the results are in terms of…

Q: A marketing manager for a cell phone company claims that more than 35% of children aged 10-11 have…

A: Assume that p is the true proportion of all children aged 10-11 that have cell phones.

Q: According to a study conducted by a statistical organization, the proportion of people who are…

A: From the given information,      P = 0.88       n = 100 We know that, Quantitative variables can be…

Q: The article “Factors Associated with Exercise Behavior in People with Parkinson Disease” (T. Ellis,…

A:

Q: In 2016, the Honors College at a large state university claimed that the average GPA of its…

A: The hypotheses are; H0: M ≥ 3.80 Ha: M &lt; 3.80 This is a lower-tailed test.

Q: Tourism is extremely important to the economy of Florida. Hotel occupancy is an often-reported…

A: Answers are in images uploaded below and calculation of p value is explained in last step. Thanks!

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: Miss America winners from the 1920's and 1930's had a average BMI of 19.4. A sample of recent…

A: Given data Miss America winners from 1920's and 1930's had an average BMI of 19.4 The reported BMI…

Q: The following data represent the smoking status by level of education for residents 18 years old or…

A: a) The test hypotheses are given below: H0: smoking status and level of education are independent.…

Q: Tourism is extremely important to the economy of Florida. Hotel occupancy is an often-reported…

A: a.   Assume that p1, p2 are the true population proportions of occupied rooms in current year and…

Q: According to data released by the Organization for Economic Cooperation and Development (OECD) in…

A: The data shows the diners spent time for two countries.

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.