A national organization conducted a survey of 1300 American adults and asked how many hours they work each week, on average. The organization reported that American adults work a mean of 40.5 hours each week. The study reported a margin of error of 0.8 hours. (Assume 95% confidence was used.)   Step 2 of 3 :   Express the confidence interval mathematically. Do not round answers.

Q: -50 50 100 X 150 A B 200 250 Answer questions a) to d) with reference to the figure above. a) Which…

A: A probability function that specifies how the values of a variable are distributed is called the…

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A: Given information:

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A: We have given that a quarterback completes 34% of his passes.We have to find the probability that it…

Q: a. What percentage of the survey answered "not sure"? b. What percentage think that middle-class is…

A: Given,the frequency table is SalaryRelative…

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A:

Q: i. List and explain the 5 steps of hypothesis testing; what conclusion do you arrive at? Compute…

A: Given,The population parameters and level of significance are - and is the sample mean. is the…

Q: (e) If the researcher decides to test this hypothesis at the x = 0.05 level of significance, will…

A: We have given thatMean(µ) = 105Sample size (n) = 35Sample mean (x̅)  = 102Standard deviations (s) =…

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A: Reseachers selected 849 patients at random among those who take a certain widely used prescription…

Q: 87. Twenty-five randomly selected students were asked the number of movies they watched the previous…

A: The given frequency distribution of the watched number of movies is as follows:# of…

Q: The local newspaper is conducting a poll about how the residents of the city feel about the traffic…

A: sample size(n)=666x=57confidence level=95%sample proportion()=

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A: The question is about continuous probability distribution.Given :Mean of the iron content in a…

Q: The histogram shows the distribution of hurricanes that have hit a country from 1851 through 2015,…

A: Category (X)12345Probability (P(X))0.4120.2670.2220.0890.010

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A: To test whether there is a significant difference between the population mean and the sample mean…

Q: The Chartered Financial Analyst (CFA) designation is fast becoming a requirement for serious…

A: The sample size is .The sample mean is .The sample standard deviation is .The confidence level is .

Q: 15. If the moment generating function for the random variable X is Mx (t) = 1, what is the third…

A: Let X be a random variable for an experiment taking values in a subset S of R The moment generating…

Q: On a recent quiz, the class mean was 75 with a standard deviation of 3.5. Calculate the z-score (to…

A:

Q: Answer the following questions and round your answers to 2 decimal places. 72% of all students at…

A: We can use the Binomial Distribution where the number of students who need to take another maths…

Q: The table below shows the height, h(t), in meters, of an object that is thrown off the top of a…

A: we have a data of t (sec) and height h(t) :th(t)0.579.525192.61.5103.2252111.42.5117.1253120.4

Q: According to a certain government agency for a large country, the proportion of fatal traffic…

A: p0 = 0.34n = 113x = 52Significance level (α) = 0.05sample proportion(p̂) = = = 0.4601769912

Q: The current value of a company is 26 million. If the value of the company six years ago was 10…

A: Solution-:Given: The current value of a company is 26 million. If the value of the company six years…

Q: Twenty-five randomly selected students were asked the number of movies they watched the previous…

A: Given frequency distribution table is,# of movies (Xi)Frequency (fi)0519263441Using formulas,

Q: Find the P-value. P-value= (Round to three decimal places as needed.)

A: Test statistic Z = 0.55, Null and alternate hypothesisH0:p=0.024H1:p>0.024

Q: Suppose that a production process changes state according to a Markov chain on [25] state space S =…

A: Suppose that a production process changes state according to a Markov chain on [25] state space S =…

Q: 2Y 0 Show that has a x² distribution with 2 degrees of freedom.

A: Mean =θ ,

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A:

Q: According to a certain government agency for a large country, the proportion of fatal traffic…

A: We have given thatp0 = 0.34n = 113x = 52Significance level () = 0.05

Q: Interpret the P-value. Choose the correct answer below. O A. If 100 random samples of size n = 35…

A: Given thatSample size (n)=35Population mean =105t test statistic=-3.0600We have to interpret the p…

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A: Given,For SATMean, μ1 = 896Standard deviation, σ1 = 174For ACTMean, μ2 = 20.6Standard deviation, σ2…

Q: a. Using the number of funds as weights, compute the weighted average total return for these mutual…

A: The formula to calculate the weighted average is,

Q: For a binomial distribution, which probability is not equal to the probability of 1 success in 7…

A: For a variable, X∼B(n,p), the probability mass function is given as follows:P(X=x)=nCxpx(1−p)(n−x);…

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A: The question is about normal distribution.Given :Proportion of children under height 60 cm =…

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A: Given that the mean cost of domestic airfares in the United States is $499 with a standard deviation…

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A: Zi ~ N(0,1) ; j=1,2,3,4  ~ N(0,1) ; j=1,2,3,4

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A: Given,

Q: write the p-value in terms of a definite integral • evaluate the p-value using software (Python or…

A: n=100 claim average length = mean length =standard deviation =1

Q: 39. Fifty part-time students were asked how many courses they were taking this term. The…

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A: The real estate broker believes that the mean price has increased.

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Q: Document1 Word Layout References Mailings Review View 15 Po Á A™ E-E-FE 3=== 13 2↓ T Paragraph…

A: The formula of mean is,

Q: b-2. What is the p-value? (Round your answer to 2 decimal places.) p-value Answer is not complete.

A: To test:H0: Median price of ticket is $603 or proportion (p) of tickets with price $603 is 0.5. H1:…

Q: a) What is the mean of the binomial distribution, rounded to two decimal places? b) What is the…

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Q: In order to determine whether or not a driver's education course improves the scores on a driving…

A: The number of paired sample observation is The sample data on drivers scores before and after taking…

Q: Problem 2 Let Y1,. (a) Find the likelihood and log likelihood functions. b) Find the maximum…

A: X~N with both  and  unknown.

Q: The data sets give the ages of award winners from 2000 to 2005 at the time of the award. Use the…

A: yearMenAgeyearWomenAge2000Phil442000Megan242001Geoff392001Elzabeth352002Chris472002Katherine272003Ed…