The table below includes results from polygraph​ (lie detector) experiments conducted by researchers. In each​ case, it was known if the subjected lied or did not​ lie, so the table indicates when the polygraph test was correct. Use a 0.05 significance level to test the claim that whether a subject lies is independent of the polygraph test indication. Do the results suggest that polygraphs are effective in distinguishing between truth and​ lies?

Q: drug testing company that provides a test for marijuana usage. Among 345 tested​ subjects, results…

A: Given: The given test is a left-tailed test. x=29, n=345, p0=0.10 The formula and calculation of the…

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A: The population proportion is studied by taking samples from the population and comparing the sample…

Q: Conduct the hypothesis test and provide the test statistic and the critical value, and state the…

A: Obtain the value of the test statistic. The value of the test statistic is obtained below as…

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: The  sample size of  people above age 55(n1) =The  sample size of  people under the age 25 (n2) =…

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: Confidence interval are used to determine the range where the true parameter lies. It calculated…

Q: An online poll​ asked: "Do you believe the Loch Ness monster​ exists?" Among 20 comma 675…

A:

Q: The table below includes results from polygraph​ (lie detector) experiments conducted by…

A: Solution: The observed count table is    Did not lie  Lie Row Total  No  11 20 31 Yes 41 14…

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A: The question is about ANOVA Given :   To find : a ) Construct ANOVA table b )  Conclusion

Q: Since an instant replay system for tennis was introduced at a major tournament, men challenged 1408…

A: a)   Consider that p1, p2 as the true population proportions of male and female tennis players, who…

Q: Use the sign test to test the indicated claim. A researcher wishes to test whether a particular diet…

A: Given Information: Sample size (n) = 24 After one month on diet, for 18 people the second blood…

Q: The table below includes results from polygraph (lie detector) experiments conducted by researchers.…

A: There are two categorical variables which are subject and polygraph test indication. We have to test…

Q: Suppose that in a random selection of 100 colored​ candies, 21​% of them are blue. The candy company…

A: Given that, n=100,p=0.25p^=0.21 The null and alternative hypothesis is,

Q: White Results from a civil servant exam are shown in the table to the right. Is there sufficient…

A: The question is about categorical data analysis Given :

Q: A used car dealer claims that the median cost of a used car is $12,000. In a random sample of 15…

A: Given median cost of a used car = $12000Total number of used cars in sample = n = 15Total number of…

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: Denote p1, p2 as the true population proportions of people, who dream in black and white over the…

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: We have given that x1 = 71 , n1 = 323 x2 = 14,  n2 = 288 Significance level (α) = 0.05

Q: The table below includes results from polygraph​ (lie detector) experiments conducted by…

A: a.   It is needed to check, whether subject lies is independent of the polygraph test indication.

Q: in a Gallup poll of 1003 randomly selected subjects, 370 said they have a gun in their home. The…

A: The probability of occurring the type I error is called level of significance or size of the…

Q: Consider a drug testing company that provides a test for marijuana usage. Among 253 tested​…

A: Denote p as the true population proportion of wrong subjects for the test of marijuana usage.

Q: Determine the test statistic. χ2=   Determine the​ P-value of the test statistic. ​P-value=   Do the…

A:

Q: Photo-Cop Legislation: Is there sufficient sample evidence to support a claim that the proportion of…

A: The hypotheses are given below: Null hypothesis: H0: p=0.5. Alternative hypothesis: H1:p >0.5.…

Q: The table below includes results from polygraph​ (lie detector) experiments conducted by…

A: It is needed to check, whether subject lies is independent of the polygraph test indication.

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A:

Q: In a recent court case it was found that during a period of 11 years 857 people were selected for…

A: Given: Sample size (n) = 857 Sample proportion (p̂) = 0.38  Population proportion (p) = 0.78…

Q: When asked whether they were comfortable writing a persuasive letter to their supervisor and whether…

A: Null hypothesis: The agreement on the two question is different i.e. there is no relation between…

Q: An online poll​ asked: "Do you believe the Loch Ness monster​ exists?" Among 20,833 ​responses,…

A: Given Pcap=0.67 P=0.50 n=20833

Q: The table below includes results from polygraph (lie detector) experiments conducted by researchers.…

A: Claim  : whether a subject lies is independent of the polygraph test indication.

Q: Results from a civil servant exam are shown in the table to the right. Is there sufficient evidence…

A:

Q: Click the icon to view the table. Determine the null and alternative hypotheses. OA. Ho: Polygraph…

A: df=(row-1)(column -1)

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: The random variable X follows binomial distribution. We have to use normal approximation to binomial…

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A:

Q: An online poll​ asked: "Do you believe the Loch Ness monster​ exists?" Among 22,038 ​responses,63 ​%…

A: Solution: From the given information, p-hat = 0.63 and n = 22,038.

Q: The table below includes results from polygraph (lie detector) experiments conducted by researchers.…

A: Given data is appropriate for testing of hypothesis to test chi-square for independence of…

Q: 28% of students at a university bought lunch from the cafeteria on class days. On a recent class…

A: Givenp=28%=0.28sample size(n)=486No. of students had bought lunch(x)=149p^=xn=149486p^=0.3066

Q: The table below includes results from polygraph​ (lie detector) experiments conducted by…

A: A chi-square test can be used to test the dependence of two categorical test called chi-square test…

Q: Astudy was conduccled to determine the proportion of people who dream in black and white instead of…

A: Given , People over age 55 : Sample size = n1 = 317 Number of people who dream in black and white  =…

Q: USA Today (Feb. 17, 2011) described a survey of 1,008 American adults. One question on the survey…

A: a) The sample proportion is p-cap = 205/1008           = 0.203 b) The population proportion p is…

Q: Consider a drug testing company that provides a test for marijuana usage. Among 250 tested subjects,…

A: Given, among 250 tested subjects, results from 28 subjects were wrong. i.e. n=250 and X=28…

Q: Consider a drug testing company that provides a test for marijuana usage. Among 308 tested subjects,…

A: Given: n= 308 ,x= 28.0 p= 0.1 ,significance level(∝)= 0.1 p̂= 28.0 / 308

Q: Persons who visit the restroom of a certain fast-food outlet were asked to state their opinion of…

A:

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A:

Q: The table below includes results from polygraph​ (lie detector) experiments conducted by…

A: State the hypotheses. Null hypothesis: Alternative hypothesis: