St. West High School requires that students are assigned an average of 2.5 hours of homework each night The school board believes that the average amount of time per night is not 2.5 hours, so they decide to take a random sample of 16 students to see if there is convincing evidence to support their suspicion. The board finds that the sample of students were assigned an average of 2.8 hours of homework per night with a standard deviation of 0.8 hours. The board want to use these sample data to conduct a t test on the mean. Assume that all conditions for inference have been met. Calculate the test statistic for their test. You may round your answer to two decimal places.

Q: Nationally, patients who go to the emergency room wait an average of 6 hours to be admitted into the…

A: Given,sample size(n)=12sample mean(x)=4.7standard deviation(s)=2.6α=0.05

Q: An article in the local paper about salaries showed that staff nurses in San Antonio earn less than…

A: From the provided information, Level of significance = 0.01

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A:

Q: Nationally, patients who go to the emergency room wait an average of 5 hours to be admitted into the…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

Q: students were given a standardized reading test. The average score of the students in the treatment…

A:

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A: we have given that n=40 ,mu=1800 , xbar=1950 and sigma=500 , alpha =0.05

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A: We have given that  Sample size n=83 , sample mean = 90 Standard deviation = 15  Population mean =…

Q: A tire manufacturer has been producing tires with an average life expectancy of 26,000 miles. Now…

A: Solution: n= 8 Sample size  μ= 26  Population mean  x (x-x) (x-x)2 28 1.25 1.5625 27 0.25…

Q: An auto magazine wants to review the tread mileage wear of tv sports tires. We will compare the…

A: Given,n1=44x¯1=20,000  ,  s1=2,000n2=48 , x¯2=21,000 , s2=2,000α=0.05and the test is two tailed…

Q: Commute Times: According to the New York Times Almanac, a survey of 15 large U.S. cities found that…

A: Introduction - t-test t=x-μσnwhere , n=sample size σ=standard deviation σx=sample mean μ=population…

Q: Nationally, patients who go to the emergency room wait an average of 4 hours to be admitted into the…

A:

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A: Obtain the 98% confidence interval for the difference between the two population means. The 98%…

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: As per Bartley guidelines expert have to answer first question three subparts only dear students…

Q: A company chooses to examine if there is a statistically significant difference in the distance…

A: GivenFor denver officeMean(x1)=410standard deviation(σ1)=40sample size(n1)=50For salt lake city…

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: Given that  Sample size n =15 Sample mean =5.4 Standard deviation =2.7 NOTE:- According to bartleby…

Q: Nationally, patients who go to the emergency room wait an average of 4 hours to be admitted into the…

A: As per our guidelines we are supposed to answer only 3 subpart of any questions so i am solving…

Q: According to the Vivino website, suppose the mean price for a bottle of red wine that scores 4.0 or…

A: Solution (a) Let μ denotes the population mean price in Providence for a bottle of red wine that…

Q: A Web-based retailer wishes to measure whether pay-per-click advertising using Google AdWords…

A: Since you've posted a question with multiple subparts, we will solve the first three complete…

Q: According to the Vivino website, the mean price for a bottle of red wine that scores 4.0 or higher…

A:

Q: Nationally, patients who go to the emergency room wait an average of 5 hours to be admitted into the…

A: Given: Population mean =5 Sample mean=4.8 sample standard deviation=2.4 sample size=14 Level of…

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: From the provided information, Sample size (n) = 14 Sample mean (x̄) = 7.1 Standard deviation (s) =…

Q: Nationally, patients who go to the emergency room wait an average of 4 hours to be admitted into the…

A: a. Since the population standard deviation is unknown, the appropriate test is one sample t-test.…

Q: A national newspaper claims that mean enrollment at four-year colleges is higher than at two-year…

A:

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: According to the Vivino website, suppose the mean price for a bottle of red wine that scores 4.0 or…

A: mu = 32.48 xbar = 30.15 s = 12 n = 61

Q: According to the Vivino website, suppose the mean price for a bottle of red wine that scores 4.0 or…

A: Given: Population mean μ = $32.48 Sample size n = 59 Sample mean X = $30.15 Sample standard…

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: From the provided information, Sample size (n) = 11 Sample mean (x̄) = 6.2 Sample standard deviation…

Q: You are a manager for a local vending machine company, and are responsible for reviewing the…

A: Given: μ=995n=30x¯=754.68s=288.19α=0.10

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: From the provided information, Sample size (n) = 15 Sample mean (x̄) = 7.4 Sample standard deviation…

Q: Lydia Hayward is an external research consultant hired by FirstCard, a major credit card company, to…

A: Correct Option D) This is a right-tailed test because the alternative hypothesis is…

Q: According to the Vivino website, the mean price for a bottle of red wine that scores 4.0 or higher…

A: We have given that  Sample size n=56 , standard deviation s=12 ,sample mean xbar=30.15

Q: The administrator at your local hospital states that on weekends the average wait time for emergency…

A:

Q: The high school athletic director is asked if football players are doing as well academically as the…

A: Given : population mean , u = 3.10  population standard deviation, σ = 0.54

Q: Commute Times: According to the New York Times Almanac, a survey of 15 large U.S. cities found that…

A: (a)   State the hypotheses.   Use EXCEL Procedure for finding the critical value of t.   Follow the…

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Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: (a)   Determine the type of test used for the given study.   The type of study used for the given…

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A: Hi, you have posted multiple question in one time. As, per the guidelines i am obliged to answer…

Q: Antelope Coffee, Inc., is considering the possibility of opening a gourmet coffee shop in Big Rock,…

A: mean = μ = 70000 standard deviation = σ = 5000

Q: A manufacturer claims that a particular automobile will get at least 50 miles per gallon on the…

A: Solution: Given: Sample size: n = 30 cars Population standard deviation: σ = 2.3 miles per gallon…

Q: 1. A particular brand of tires claims that its deluxe tire averages at least 55,000 miles before it…

A: Given : n(sample size)=45 Alpha(level of sig.)=0.05

Q: If New York City has a mean gasoline price of $307 with a standard deviation of $19; while Hawaii…

A: Given that: Mean and standard deviation of New York City: μ1=307σ1=19 Mean and standard deviation of…

Q: According to the Vivino website, suppose the mean price for a bottle of red wine that scores 4.0 or…

A:

Q: Nationally, patients who go to the emergency room wait an average of 4 hours to be admitted into the…

A: From the provided information, Sample size (n) = 14 Sample mean (x̄) = 4.5 Standard deviation (s) =…

Q: According to the Vivino website, suppose the mean price for a bottle of red wine that scores 4.0 or…

A: Given: μ=32.48n=64x¯=30.15s=12

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: Given,sample size(n)=11sample mean(x¯)=8.6standard deviation(S)=1.7α=0.01

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: Given that  Sample size n =12 Sample mean =5.8 Standard deviation =1.8 NOTE:- According to bartleby…

Q: According to the Vivino website, suppose the mean price for a bottle of red wine that scores 4.0 or…

A: (a) Let μ denotes the population mean price in Providence for a bottle of red wine that scores 4.0…

Q: A cellular battery manufacturer claims that his battery when fully charged has mean life of 24 hours…

A: The set or collection of all possible observations is defined as the population.