A survey was conducted on a simple random sample of 1000 women who just gave birth asking them whether or not they smoked during pregnancy. A follow-up survey asking if the children had respiratory problems is conducted 3 years later. However, only 567 of these women are reached at the same address. Can the researcher state that these 567 women are representative of all new mothers? Explain your answer.

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Q: A study found that 80% of teenagers use social media on a regular basis. John wants to investigate…

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Q: A company manufactures cell phone chargers. In August, a random sample of 200 chargers were…

A: Let X be the number of defectives from the binomial distribution with probability (p) = 3/200 and…

Q: An article in the newspaper claims that 60% of registered drivers have the organ donor designation…

A: This question is based on hypothesis testing. Specifically, this question was asked to verify the…

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Q: A corporation randomly selects 150 salespeople and finds that 66% who have never taken a self-…

A: Let p1 denotes the proportion of workers who have never taken a self- improvement course. Let p2…

Q: A recent study investigated whether cell phone users experience separation anxiety when they cannot…

A: cell phone no cell phone 100 154 101 129 93 129 101 71 87 128 120 123 142 126 115…

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Q: A newly-established manufacturing firm of papaya soap, claims that 80% of ladies who tried the said…

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Q: An education researcher claims that at most 3% of working college students are employed as teachers…

A: Solution: From the given information, p-hat=0.04 and n=200. The given claim is that at most 3% of…

Q: A consulting firm that surveyed consumers' holiday shopping behavior found that the percentage of…

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Q: A study published in the the journal Public Library of Science took 134 people, who were at risk of…

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Q: A recent study investigated whether cell phone users experience separation anxiety when they cannot…

A: The t – critical value is the value, which is obtained from the t – distribution. The t - critical…

Q: Does being part of a support group affect the ability of people to quit smoking? A county health…

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Q: A recent study investigated whether cell phone users experience separation anxiety when they cannot…

A: Cell Phone (CP) No Cell Phone (NCP) 113 118 116 162 120 131 110 169 125 106 89 117 126…

Q: An ambulance service claims that at least 65% of the calls received involve life-threatening…

A: Given information- Population proportion, p = 0.65 Sample size, n = 150 Significance level, α = 0.05…

Q: Last year, the marist poll conducted a national survey of adults and found that 35% responded "A lot…

A: Null and Alternate Hypothesis: H0: Response to this question by adults nationwide has not changed…

Q: A popular blog reports that 60% of college students log in to Facebook on a daily basis.  The Dean…

A: Given data number of success , x= 134 sample size, n =200 population proportion,p=…

Q: compute the p-values associated with tobs, assuming h1: μcp - μncp < 0 for the data collected in…

A: The t-test is useful for testing the difference between population means for independent samples.

Q: Suppose a survey of 899 college students who were asked about their smoking behavior. Of the…

A: Given Information : Suppose a survey of 899 college students who were asked about their smoking…

Q: Opinion Research has said that 49.46% of U.S. adults have purchased life insurance. Suppose that for…

A: Proportion z_test: If the given sample size is more than 30 then that is a large sample test. z test…

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A: Stating the appropriate null and alternative hypotheses: The hypotheses are given below: Null…

Q: In a National Institute on Alcohol Abuse and Alcoholism survey, 33% of American adults said that…

A: Given: n= 2300 ,x= 805 p= 0.33 ,significance level(∝)= 95.0 p̂= 805 / 2300 =define hypothesis;-

Q: A report by the Gallup Poll stated that on average a woman visits her physician 5.8 times a year. A…

A: (a). Null and alternate hypotheses: Based on reading the problem, we know that we are working with a…

Q: It has been found that 27.6% of men (Group 1) 20 years and older suffer from hypertension (high…

A: Solution:- from given information sample size n1=169 n2=169 x1=39 x2=54 α=0.05 claim: A higher…

Q: Does being part of a support group affect the ability of people to quit smoking? A county health…

A: (a) The 2 x 2 contingency table is given as follows:   Received nicotine patch +Met support group…

Q: A market researcher claims that the purchases for a particular gift item are men, 50 percent; women,…

A: Introduction: Denote the proportion of purchases for a particular gift item made by men as p1.…

Q: A local jam production company is confident that 60% of the population will like its new grapefruit…

A: Here events are independent.

Q: A college instructor claims greater than 75% of NSC students are in favor of smaller class sizes, if…

A: State the hypotheses.

Q: A researcher claims that based on the information obtained from the Centers for Disease Control and…

A: Given: 17% of young people ages 2-19 are obese Randomly select 200 people and 42 found obese. X= 42…

Q: The national Center for Health Services found that 26% of men aged 20 years or older suffer from…

A: Given information- Sample size, n = 150

Q: Recent research has found that 10% of Americans aged 30-49 played tennis in the past 12 months. A…

A: Recent research has found that 10% of Americans aged 30-49 played tennis in the past 12 months. p =…

Q: A dietitian read in a survey that at least 55% of adults do not eat breakfast at least 3 days a…

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Q: An organization published an article stating that in any one-year period, approximately 11.5 percent…

A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we…

Q: According to the Washington Post, 45% of all Americans are born with brown eyes. Consider a random…

A: State the hypotheses. That is, the proportion of brown- eyed adults in New York do not differs from…

Q: Suppose that 73.2% of all adults with type 2 diabetes also suffer from hypertension. After…

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Q: neurosurgeon believes that lesions in a particular area of the brain, called the thalamus, will…

A: n1=8 n2 =7 df1= 8 - 1=7 df2= 7-1=6 We have to answer for mentioned questions.

Q: A recent study investigated whether cell phone users experience separation anxiety when they cannot…

A: There are two independent samples which are Cell Phone and No Cell Phone. We have to find the effect…

Q: Does being part of a support group affect the ability of people to quit smoking? A county health…

A: A county health department enrolled 300 smokers in a randomized experiment. 150 participants

Q: Suppose the researcher theorizes that 75% of physics students are male. He surveys a random sample…

A: Hypotheses are H0: P=0.75 H1: P≠ 0.75

Q: A survey by Men’s Health magazine stated that 14% of men said they used exercise to reduce stress.…

A: The test statistic for a single proportion, Z=p-PP(1-P)nwhere p=sample proportionP=population…

Q: A group of doctors published an article in the New England Journal of Medicine. In the article they…

A: Solution: Given information: n1= 367   Sample size of assigned to surgery n2= 364    Sample size of…

Q: In a random sample of 1022 Canadian adults, 480 think that the Canadian government is doing too…

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Q: A recent study investigated whether cell phone users experience separation anxiety when they cannot…

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Q: A lawn mower company will produce 1,500 lawn mowers by 2020. In an effort to determine how much…

A: Given, N = 1500 n =  187  x= 5.3 µ = ? σ = 1.28 years Sample size 187 &gt; 5% of the population…

Q: A recent study investigated whether cell phone users experience separation anxiety when they cannot…

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Q: The principal of a certain high school claims that 85% of all the students is in favor of the new…

A: Let, P and p are the population and sample proportion respectively. Here 0.05 level of significance…

Q: 3 out of 4 american adults under age 35 have eaten pizza for breakfast. if a random sample of 20…

A: Let the R.V X denotes the number of adults eaten pizza for breakfast and it follows the binomial…

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.