A nationwide survey claimed that at least 55% of parents with young children condone spanking their child as a regular form of punishment. In a random sample of 100 parents with young children, how many would need to say that they condone spanking as a form of punishment in order to refute the claim at a=0.5

Q: If there were 760 students in Jamal’s class, approximately how many students scored higher than…

A: The probability that z-score is greater than 1.41 is calculated as follows: PZ>1.41=1-PZ≤1.41…

Q: According to a survey conducted in 2004 of 1000 American adults with Internet access, one in four…

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Q: A medical researcher says that less than 72% of adults in a certain country think that healthy…

A: Given information: Sample size(n)=200. Sample proportion for healthy children's should be required…

Q: A recent drug survey showed an increase in the use of drugs and alcohol among local high school…

A: Provided data are, x1 = 65   n1 = 100 x2 = 60   n2 = 100

Q: A biologist claims that nearly 45 percent of all Americans have brown eyes. A random sample of…

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Q: low-birth-weight babies graduate from high school by age 20. If 180 ​very-low-birth-weight babies…

A: The expected value can ve calculated as, E(x) =np

Q: Use the answer in item 4 to fill in the blanks. In the UK, if you are you are times more likely to…

A: Absolute risk is also known as risk difference. It helps to measure the chance of occurrence of…

Q: From the analysis of students’ marks, Mr Adam decided to do one-to-one consultation with his…

A: If we consider that the students should bring the marks above the median, they are only exempted…

Q: For a population with μ = 80 and σ = 10,what is the X value corresponding to z = -0.50?

A: Given information Mean (µ) = 80 Standard Deviation(σ) = 10 Z = -0.50 Z-score is given by the…

Q: According to the American Automobile Association, 31 million Americans travel over the Thanksgiving…

A: Given information: Sample sizes at each of four locations n=125 Significance level α=0.10 The…

Q: A researcher rejected the null where r(146) = .148, p = .03 and concluded that the effect size was

A: Reviewing information, Given that, r=0.148p=0.03

Q: Three-fourth of the students in the class have an average lQ of 120 and the rest have an average IQ…

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Q: A poll stated 36% of people drink coffee to combat midday drowsiness. A recent survey was taken and…

A: Givenn=48x=19p^=xn=1948=0.3958α=0.02

Q: In a survey of 1,700 people who onwed a certain type of car 595 said that they would buy that type…

A: In a survey of 1,700 people who onwed a certain type of car 595 said that they would buy that type…

Q: In a sample of 45 men, 27 said that they had less leisure time today than they had 10 years ago. In…

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Q: Of the trains that recently arrived at Hampton Station, 4 were on time and 2 were late. Considering…

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Q: A medical researcher says that less than 84% of adults in a certain country think that healthy…

A: A random sample of 400 adults in a country is taken, 81​% think that healthy children should be…

Q: A sample of 425 voters aged 18 – 25 were asked whether they thought Social Security benefits should…

A: Given information- Significance level, α = 0.05 Let, p1 = proportion of voters aged 18 – 25 were…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A:

Q: A poll done for Newsweek found that 15% of Americans have seen or sensed the presence of an angel. A…

A: In statistic, Individual means, a thing on which the characteristics is studied. The total…

Q: A iPhone store starts by selling 100 iPhone pre-ordered in week zero and expects to sell an average…

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Q: A sample of n equals 20 scores is transformed into z-scores what is the meaning for the set of 20…

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Q: In a sample of 47 men, 36 said that they had less leisure time today than they had 10 years ago. In…

A: We have to perform test for difference in two proportion.

Q: In research about the population of a county with 100,000 inhabitants, a sample of 3000 households…

A: According to the provided data, a total of 3000 households were contacted to participate in the…

Q: If Gena's score is 85, the class average is 82, and the SD is 4, what is Gena's Z-score?

A: If Gena's score is 85, the class average is 82, and the SD is 4, what is Gena's Z-score?

Q: A Company is planning a Children’s Christmas party for their 750 employees. Base on the survey…

A: This problem solve by property of set's . The solution of the problem in the next page .

Q: of the population have high school scores less than 77?

A:

Q: An engineer believes that by employing robots instead of humans for certain jobs in the…

A: Given : An engineer believes that by employing robots instead of humans for certain jobs in the…

Q: If there were 500 students in Jamal’s class, approximately how many students scored higher than…

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Q: In a class in which the final course grade depends entirely on the average of four equally weighted…

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Q: A cognitive psychologist working in the area of suggestion asked a sample of children to solve as…

A: According to our answering guidelines, we can answer only first three subparts of a question and the…

Q: Lucy collects data from a random sample of seventh-graders. Out of 40 respondents, 7 attend…

A: no. of student in sample = n = 40 no. of students attended after-school Programms = x = 7 Total No.…

Q: A medical researcher says that less than 86% of adults in a certain country think that healthy…

A: solution

Q: In a survey of 3063 adults aged 57 through 85 years, it was found that 80.8% of them used at least…

A: Number of adults surveyed, n = 3063 And proportion of them used at least one prescription…

Q: In a survey at a local university 52% of students say that they less than the recommended eight…

A: The problem concerns working out the percentages and interpreting .

Q: A medical researcher says that less than 76​% of adults in a certain country think that healthy…

A: Denote p as the true population proportion of adults in a certain country, who think that healthy…

Q: In a one-tail test, the p-value is found to be equal to 0.0026. If the test had been two-tailed, the…

A: Here use basic concepts of p value

Q: It is bleieved that the percent of convicted felons who have a history of juvenile deliquency is…

A: Solution: State the hypotheses Null hypothesis: That is, the percent of convicted felons who have a…

Q: In research about the population of a county with 100,000 inhabitants, a sample of 3000 households…

A: The number of households not willing to participate in the survey is 1200.

Q: or a population with μ  = 80 and σ = 10,the z-score corresponding to X = 85 would be?

A: The z-score tells  number of standard deviation a value is above or below from the mean. If the…

Q: The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.35…

A: The z-test determines the claim about one population proportion.

Q: medical researcher says that less than 85​% of adults in a certain country think that healthy…

A: Given that  A medical researcher says that less than 85​% of adults in a certain country think that…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A:

Q: A medical researcher says that less than 86​% of adults in a certain country think that healthy…

A:

Q: At a local pool, a new swimming instructor (Teacher 1) is being evaluated by how many of his…

A: From the provided information,

Q: A survey shows that 3 out of 4 of those drink coffee in a town with a population is 7900 adults how…

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Q: A bicycle manufacturer observes that the number of bike paths in a city affects the number of…

A: here take  x= no. of bike paths y= no. of bicycle sold here compute the regression line and then for…

Q: A medical researcher says that less than 85​% of adults in a certain country think that healthy…

A:

Q: A medical researcher says that less than 81% of adults in a certain country think that healthy…

A: