Suppose that a poll taken 10 years ago found that 56% of parents spank their children. Suppose a recent poll of 300 adults with children find that 143 indicated that they spank their children. Assuming parents attitudes toward spanking has not changed since the original poll how many of the 300 parents surveyed would be expected to spank their children.

Q: Individuals at risk for colon cancer are advised to have a colonoscopy beginning at age 50. The…

A: Given that: Total number of patients = 250   Colon cancer: yes Colon cancer: no Total…

Q: A survey of 62 men found that 12 have a social media account. Another survey of 57 women found that…

A: Men are taken as group 1. Women are taken as group 2.   Given: n1=62x1=12n2=57x2=40α=0.07

Q: A survey of 78 men found that 10 have a social media account. Another survey of 51 women found that…

A: Given Information: Women: Sample size (n1) = 51 Out of which X1 = 26 have a social media account.…

Q: The General Social Survey asked a sample of 1294 people whether they performed any volunteer work…

A: The null and alternative hypothesis, This is the right-tailed test, for α=0.05 The critical value…

Q: A recent survey of 537 California college students found that 481 had taken an online class in the…

A:

Q: A hot topic of debate is whether the legal driving age should be raised to eighteen. From a random…

A: It is tested whether majority of the Americans believe the legal driving age should be raised to 18.…

Q: When 345 HS students were surveyed, 125 said that they completed a driver's education class prior to…

A:

Q: A researcher wishes to estimate the number of households with two types of vegetables in their…

A:

Q: A research report from an independent-measures study states that there are significant differences…

A: The degrees of freedom for treatment (k-1) is 3.

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

A:

Q: General Motors wants to know if a newly designed car has a different appeal to people under 30…

A:

Q: Among college students, the proportion p who say they're interested in their congressional…

A: The random variable interest rate follows normal distribution. We have to test whether the…

Q: . In Exton School, 60% of the boys play football and 36% of the boys play ice hockey. Given that40%…

A: Let us define the events as, A: Boys who play football.B: Boys who play ice hockey. From the given…

Q: A pollster wishes to estimate the number of left-handed scientists. How large a sample isneeded in…

A:

Q: Among college students, the proportion p who say they're interested in their congressional…

A: Given X=185 n=260

Q: According to a recent report, 21% of all adults routinely skip breakfast. A researcher believes this…

A:

Q: In a survey of 1150 adult males, 805 said they use the Internet. In a survey of 1050 females, 746…

A: There are two dependent variables which are males and females. The independent variable is using of…

Q: About 7% of males are colorblind. Hoping to find many colorblind men for her study, a researcher…

A: It is given that p =0.07 and n = 433.

Q: A random study reported that 74% of very-low-birth-weight babies graduate from high school by age…

A: Given that, The probability of very high low birth weight babies graduate from high school by age 20…

Q: The head of a computer science department is interested in estimating the proportion of students…

A: Given: Margin of error E = 0.04 Significance level α = 0.05 The critical value Zα/2=Z0.05/2=1.96 The…

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: A pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in…

A:

Q: If in a discrete data, 75% of the values are less than 30, then......?

A: we know that,  If Q1 is first quartile then we can say that 25% data points are below Q1. If Q2 is…

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A: Given,n=50x=33p^=xn=3350 =0.66α=0.05

Q: A professor found out from a senior professor that engineering students in Harp University tend to…

A: Given information: μ=1.50x¯=1.35s=0.50n=9α=0.10

Q: a pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in…

A: Given P=0.09 E=0.06 Z(0.01)=2.33

Q: A researcher claims that the percentage of voters that favor voting via absentee ballot is 35%.…

A: It is given that the researcher claims that the percentage of voters that favor voting via absentee…

Q: A decade-old study found that the proportion, p, of high school seniors who believed that "getting…

A: The sample proportion is, The null hypothesis is, The alternative hypothesis is, Significance…

Q: In a recent election, 54% of all registered voters participated in voting. In a survey of 350…

A: Writing the sample population as a percentage i.e. 217 of 350:

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

A: Let p1 denotes the population proportion of adults in Country A who favor building new nuclear power…

Q: Suppose that a poll taken 10 years ago found that 57% of parents spank their children. Suppose a…

A: A binomial distribution can be approximated as normal distribution if the value of n·p and n·p1-p is…

Q: A sobriety test is 96% accurate. Suppose 2500 drivers were pulled over on suspicion ofintoxication,…

A: Given that the sobriety test is 96% accurate, 2500 drivers were pulled over on suspicion 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: According to a recent Pew Research Center report, many American adults have made money by selling…

A: Given Data: x=914 n=4579   p^=xn=9144579=0.1996

Q: During a country wide investigation the incidence of TB was found to be 1%. In a college of 400…

A: In a college 5 were reported to be affected by the incidence of TB out of a strength of 400(=n1). ∴…

Q: “In a recent survey, 63% of decided voters said they would vote for the mayor in the next election.…

A: The confidence interval for population proportion is given by; p^-ME,p^+ME where, ME=zα/2p^(1-p^)n

Q: Among college students, the proportion p who say they're interested in their congressional…

A: Given that  Sample size n =260 Favorable cases x =185 Sample proportion p^=x/n  =185/260 =0.7115…

Q: General Motors wants to know if a newly designed car has a different appeal to people under 30…

A: Given data  General motors wants to know if a newly designed car has a different appeal to people…

Q: In a random sample of 1022 U.S. adults, 480 think that the U.S. government is doing too little to…

A: Hypotheses:   Here p1 and p2 be the two proportions. The aim is to check whether p1= p2. The null…

Q: A pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in…

A: From the provided information, Study indicates that proportion of left-handed scientists is 9% that…

Q: The U.S. Census Bureau reported in 2002 that, for people 18-24 years old, the mean annual income for…

A: Given that  Population mean μ =21539

Q: A Pew poll taken in 2010 surveyed 830 people aged 18-29 and found that 166 of them had one or more…

A: State the hypotheses.

Q: State the null hypothesis H0 and the alternative hypothesis H1 . H0: H1: (b) Determine the type of…

A: Given that  Sample size n =270 Favorable cases x =194 Sample proportion p^=x/n  =194/270 =0.7185…

Q: A survey reported that 68% of registered voters in California approved of allowing two people of the…

A: Define the following events:   A:  a resgister voter who approve gay marriage. B: a ragister voter…

Q: On a recent survey, 60% of people said they preferred walking to running. If 540 people liked…

A: Number of people who liked walking = 540 Percentage of people who like walking = 60%

Q: Suppose that the result of a public opinion poll shows that just 10% of people would be willing to…

A:

Q: In a survey of 1150 adult males, 805 said they use the Internet. In a survey of 1050females, 746…

A: From the provided information,

Q: Rose randomly surveyed 50 students and found that 15 had a part-time job. If there are 750 students…

A:

Q: A random sample of 40 students from each grade level was surveyed regarding their preference for a…

A: I have given an answer in step 2.

Q: In a survey of a sample of 1050 teenagers, 17% said they like to watch soccer.

A: Given that  In a survey of a sample of 1050 teenagers , 17% said that they like to watch soccer.…