TD Bank prides itself on the efficiency of its tellers. They brag with a testimonial hanging in the lobby that says "I never wait in line at TD". Their claim that on average there is no one waiting in line at TD Banks (with a standard deviation of 1.2 people). You are an external auditor who is brought in to test the validity of this claim. You record the lobbies at 25 different TD Banks and the average number people of waiting in line is 2.2 people. Construct a hypothesis test with alpha of .01 to determine if the average people waiting is different than 0.

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A: Calculate the z-score corresponding to the Mark

Q: One year Thomas had the lowest ERA (earned-run average, mean number of runs yielded per nine innings…

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Q: A union of restaurant and foodservice workers would like to estimate this year's mean hourly wage u…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

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A: Type II error = P( Fail to reject Ho| When mu = 25)

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A: Let the systolic blood pressure be denoted by X. Given: X~N142, 132 sample size (n) used: 23 sample…

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Q: Suppose​ 18% of​ movie-goers say that horror is their favorite movie genre. If a random sample of…

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Q: According to the Institute of Medicine, the tolerable upper level of sodium intake for adults and…

A: Solution :  Given : μ = 2300 mg             n = 14             x¯ = 2310              s = 38 mg…

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Q: Social scientists have designed a “happiness survey” that attempts to measures how happy people feel…

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Q: Suppose you know the population average wage in the manufacturing industry in the U.S. is $26.72 per…

A: true mean value = 25 mu = 26.72 s = 2.6

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A: Given,mean(μ)=95standard deviation(σ)=10

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Q: Christine recently switched her primary doctor to one specializing in caring for elderly patients.…

A: The test hypotheses are: Null hypothesis: H0: μ = 115. Alternative hypothesis: H1: μ > 115

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A: Given: Mean μ=50 Standard deviation σ=10

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A: Here, Two friends have decided to take a welding class together Virgil got 38 on the first quizThe…

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Q: A​ town's January high temperatures average 34°F with a standard deviation of 8°​, while in July the…

A: The information provided in the question are as follows : For January :- Mean (µ1) = 34 Standard…

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Q: You are a consumer advocate. A particular brand of tires state that they last for 50,000 miles…

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Q: A nutritionist conducted a study on the eating patterns of early adolescent boys and girls. Calorie…

A: GivenFor boysThe mean calories per day =3300standard deviation =790 For girlsThe mean calories per…

Q: due to the increasing price of apartments each year, houston chronicle reported that rent of 1 bed 1…

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Q: Visit finance.yahoo.com and download data of 5 stocks you might be interested to invest in.…

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Q: Your econ professor asked you to find the prices of various goods in two different grocery stores in…

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Q: According to the College Board, scores on the math section of the SAT Reasoning college entrance…

A: Given information, Mean =516 Standard deviation =116

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.