A telephone survey of 1000 randomly selected US adults found that 31 % of them say they believe in ghosts. Does this provide evidence that more than 1 in 4 US adults believes in ghosts?

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

A:

Q: A researcher randomly selects 1000 death certificates and, after interviewing the attending…

A: Given:- The contingency table is given as;   Cancer Heart Disease Other Total Smoker 135 310…

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: (1).           % of men in this study received only Vitamin E and developed prostate cancer. (2).…

A: Given:     No Prostate Cancer Prostate cancer Total Selenium 8177 575 8752 Vitamin E 8117…

Q: According to a Gallup survey two years ago, 32% of American households use a computer or online…

A: From the provided information, Sample size (n) = 85 Sample proportion (p̂) = 0.36 Level of…

Q: The investigators reviewed the records of 210 patients who had undergone the staging procedure and…

A: We are interested in exposure of interest.

Q: Over the past few decades, public health officials have examined the link between weight concerns…

A: Solution: From the given information, number of selected teen girls living in Massachusetts is 273…

Q: Members of the millennial generation are continuing to be dependent on their parents into early…

A: Denote p as the true proportion of aged 18-32, who are continued to be dependent on their parents.

Q: In a study that compared average time taken by a men and women to do a certain job, a random sample…

A: Given Information :  In a study that compared average time taken by a men and women to do a certain…

Q: A magazine conducted a random sample of 800 Americans and asked, "Should the federal tax on…

A:

Q: In a previous poll, 43% of adults with children under the age of 18 reported that their family ate…

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Q: A researcher concluded that a patient was in the risk group of developing a rare disease based on…

A: Solution: Here, hypotheses for this test can be written as follows: H0: A patient was NOT in the…

Q: randomly selected sample of 400 students at a university with 15-week semesters was asked whether…

A: Given that  Sample size n =400 Sample proportion p^=46%=0.46

Q: (a) In a random sample of 500 men from a particular district of UP, 300 are found to be smokers. In…

A: In the first district, Sample size=500Smokers=300 The percentage of smokers is calculated as, P1=No.…

Q: Results from a survey conducted in a certain grocery store showed that 3 out of 5 people preferred…

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Q: Based on a poll of registered voters in a large city, 120 out of a random sample of 250 women…

A: Given Information: Sample 1 (women): Sample size n1=250 Out of which x1=120 intended to vote for…

Q: A 2012 survey of 2247 American adults indicates that 16% of cell phone owners do their browsing on…

A: A z-test for two proportions is a hypothesis test that attempts to make a claim about the population…

Q: Does stretching before exercise reduce the chance of injury? To answer this question, a random…

A: Hypotheses: Here p1 be the proportion of an individual who stretch prior to exercise and p2 be the…

Q: In a study of color perception, 180 men are tested, and 18 are found to have red/green color…

A: Given :  n = 180 x = 18 p^ = 18/180 = 0.1

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 tamoxifen study claims that a combination of chemotherapy and the hormone therapy tamoxifen is…

A: In this study, which is the control group? The control group in a study is the one which do not…

Q: A survey of randomly selected university students found that 91 of the 106 first-year students and…

A: (a) Using Excel formula “=NORM.S.INV(1-(0.02/2))” (or from standard normal distribution table), the…

Q: A Gallup poll in 2010 asked 1,019 adults in the U.S. about their belief in the origin of humans…

A: e). The hypothesis to be tested here is- H0:The population follows the 2001 distribution.H1: The…

Q: A company manufactures cell phones. In August, a random sample of 125 cell phones was inspected, and…

A:

Q: It has been claimed that over 30 percent of entering college students have blood cholesterol levels…

A: Given: Sample size (n) = 20 Number of students with blood cholesterol level of at least 200 (x) = 6

Q: Was the person who took Vitamin C more likely, less likely, or about equally likely to get a cold as…

A: Given that Number of persons who took vitamin C got cold = 3000 Total number of persons who took…

Q: A survey is conducted on the use of Facebook of adults in the United States, where 12,000 adults are…

A: Population of a survey means the entire group on which we are taking survey. Sample is a specific…

Q: The National Institute of Mental Health published an article stating that in any one-year period,…

A: The hypotheses can be constructed as: Null hypothesis: H0: p = 0.095 Alternative hypothesis: H1: p…

Q: A random sample of 750 registered voters in Phoenix is asked if they favor the use of oxygenated…

A:

Q: A medical researcher claims that 70% of people pay for prescriptions with private insurance, 25% pay…

A: Let p1 be the proportion of people who pay for prescriptions with private insurance, p2 be the…

Q: Can vaccination be regarded as preventive measure for smallpox, from the data given Below? Of 1,482…

A:

Q: A team physician has determined that of all the athletes who were treated for minor back pain, 72%…

A: Let the number of athletes be 100. The Venn diagram can be obtained as shown below: The number of…

Q: Has the proportion of Americans that are "20-somethings" decreased? According to the US Census…

A: Solution-: Given: x=65,n=500,P0=0.151,α=0.10 We want to determine, (e) p-value=? (f) At α=0.10…

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 following table shows the results of a recent health survey of 400 patients from hospitals of…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: Fifty-five percent of people who move from an area without fire ants to an area with fire ants get…

A: From the above data We are given that Fifty-five percent of people who move from an area without…

Q: A survey by the National Institutes of Health asked a random sample of young adults (aged 19 to 25…

A: It is to be checked whether the living location is independent of the gender.

Q: A study in Boston schools questioned third graders to see if they felt stress in their school life.…

A: Given  X1=18, n1=37, X2=16, n2=54 We want to test the boys and girls experience stress differently

Q: Eighteen percent of U.S.-based multinational companies provide an allowance for personal…

A: From the given information, Eighteen percent of U.S.-based multinational companies provide an…

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

A:

Q: In a random sample of 450 people aged 20-24, 24% were smokers. In a random sample of 400 people aged…

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Q: People with headaches are randomly divided into two groups. One group gets pain medication, and the…

A: Experimental Study: If some treatments are applied on the individuals in order to observe the…

Q: A hearing specialist conducts a study on hearing loss at certain frequencies among a group of…

A: Topic - venn diagram and sets

Q: Construct a 90% confidence interval for the difference in mean body esteem score for the video…

A: (a) The degrees of freedom is,…

Q: 2. A study for adverse reactions assigned adults at random to one of two common pain relievers…

A: Given Information: Group 1: n1=733 x1=103 Group 2: n2=732 x2=85

Q: Based on these tables, would you accept or reject the hypothesis that individuals in bad…

A: From the given output table it is clear that there are two groups good neighborhood and bad…

Q: According to Nielsen Media Research, of all the U. S. Households that owned at least one television…

A: From the provided information, The hypotheses can be constructed as: H0: p = 0.83 Ha: p < 0.83…

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.