2) Suppose that a manufacturer of laptop batternes claims that his product last more than 950 hours. They test 45 batteries and found a sample mean of 925 hours and the population standard deviation of 5 hours. Use 5% significance level. Should the claim be accepted?

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: 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: 3. Compute for the sample size if the margin of error is 12, with a sample standard deviation of 35…

A: The z-critical value for a 95% confidence interval is calculated using the excel formula…

Q: 18. An automobile manufacturer recommends oil change intervals of 3,000 miles. To compare actual…

A:

Q: An office manager claims that the meantime required to handle a customer complaint is more than 30…

A: Let μ be the population mean time required to handle a customer complaint. The claim of the manager…

Q: An insurance company is reviewing its current policy rates. When originally setting the rates they…

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

Q: In a sample of 8 hip surgeries, the average surgery times was 131.5 minutes with a standard…

A: GivenMean(μ)=131.5standard deviation(σ)=20.9sample size(n)=8

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

A:

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

A: Given: μ0=5 hours.n=11x¯=2.7 hours s=2.9 hoursα=0.05

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: 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 5 hours to be admitted into the…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: A restaurant chain has two locations in a medium-sized town and, believing that it has oversaturated…

A: Step-by-step procedure to obtain the test statistic using Ti83 calculator. Press STAT. Press STAT…

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

A: For this study, we should use : t test for a population mean

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: A pipes manufacturer makes pipes with a length that is supposed to be 19 inches. A quality control…

A:

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: An ice cream company owns two plants, namely A and B, and wants to test using a 5% significance…

A: Given: The two plants of ice cream company are A and B. The level of significance is α=0.05. The…

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: Suppose that a manufacturer of laptop batteries claims that his product last more than 950 hours.…

A: Given data : sample size, n = 45 sample mean, x̄ = 925.0 sample standard…

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: the chamber of commerce of a florida gulf coast community advertises that area residential property…

A: The average weight has gone down. H0 : μ ≤125000. Alternative hypothesis: Ha :μ  >125,000 Since…

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: A simple random sample of 35 horror has a mean duration of 107.3 minutes and the sample sandard…

A: a) Consider that μ is the true mean duration time of horror films. Here, it is needed to know…

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: 4. The existing system for the production of a certain item has a mean of 50 seconds, and a standard…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

Q: A pipes manufacturer makes pipes with a length that is supposed to be 18 inches. A quality control…

A:

Q: The Orange County Supervisor claims that full-time salaried employees in her county have a mean…

A: Given:

Q: A random sample of 50 public school teachers in Georgia had a mean annual salary of $48,300. Assume…

A: The hypotheses for the test is given below.Null hypothesis:H0: µ = $50,000Alternative hypothesis:H1:…

Q: A national business magazine reports that the mean age of retirement for women executives is 61.0. A…

A:

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

A: Given that  Sample size n =20 Sample mean =3.18 Sample standard deviation =0.54

Q: n a scientific study conducted by the Dax Science Lab on Deep Space Nine, 41 male rats were sent to…

A:

Q: Consider a sample with data values of 27, 25,20,15,30,34,28, and 25. Compute the range,…

A: Introduction: Consider the arrangement of the given observations in an ascending order for the…

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)=15sample mean(x¯)=7.5standard deviation(s)=2.5α=0.05

Q: In attempting to improve student services, a college investigates its registration process and finds…

A: If x¯1 and x¯2 are the means of two independent sample of size n1 and n2 with sample deviation s1…

Q: A pipes manufacturer makes pipes with a length that is supposed to be 16 inches. A quality control…

A:

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: St. West High School requires that students are assigned an average of 2.5 hours of homework each…

A: From the provided information, Sample size (n) = 16 Sample mean (x̅) = 2.8 Sample standard deviation…

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

A:

Q: What is the estimated standard error for a paired sample t test using the following data:  Standard…

A: Solution: It is given that the standard deviation of the difference score is 5 and the sample size…

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: find and interpret the z-score for the darta value given/ the value 250 in a dataset with mean 208…

A: It is given that X = 250, Mean = 208 and SD = 21

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: at teenagers spent 4.5 hours per week, on average, on the phone. The organization thinks that,…

A: According to the given information in this question We need to identify the correct conclusion

Q: In a study of consumer credits, 22 randomly selected credit holders were surveyed, and the mean…

A:

Q: For a sample of 60 women taken from a population of over 5,000 enrolled in a weight- reducing…

A: Given, n = 60 x¯ = 101, s = 42, α=0.02

Q: In an analysis investigating the usefulness of​ pennies, the cents portions of 104 randomly selected…

A: Given that  Sample size n =104 Sample mean =47.5 Sample standard deviation s=30.4 NOTE:- According…

Q: In a random sample of 32 fossilized male femurs found at the Gronsalen Barrow, the mean weight was…

A: