A pizza place recently hired additional drivers and as a result now claims that its average delivery time for orders is under 45 minutes. A sample of 38 customer deliveries was​ examined, and the average delivery time was found to be 40.4 minutes.​ Historically, the standard deviation for delivery time is 10.5 minutes. Using α=0.10​, complete the questions below. Z test statistic The critical z-score(s) is(are): Because the test statistic ________________________, ________________ the null hypothesis. Determine the p-value __________

Q: mpare the Z scores for the actors in the following situation  Best actor population mean = 42.0…

A: Concept: A z-score is known as the standard score that determines how much the data point deviates…

Q: A factory that manufactures bolts is performing a quality control experiment. Each object should…

A: Provided information is ; sample size(n) =69 bolts sample mean(x¯) = 18.04 Population standard…

Q: a company conducts tests on the useful life of batteries. The average life of an alkaline D cell…

A: Given Information :  A company conducts tests on the useful life of batteries. The average life of…

Q: company has a policy of retiring company cars; this policy looks at number of miles driven, purpose…

A:

Q: The distribution of average hours of sleep per weeknight among college students is found to be…

A: Concept: Z is known as Standard normal variable used for calculating area under normal curve Z=…

Q: Low-fat or low-carb? Are low-fat diets or low-carb diets more effective for weight loss? A sample of…

A:

Q: A researcher claims that some particular bacteria with an average life span of 10 hours will live to…

A: Given Information: Sample size n=32 Sample mean x¯=14 Standard deviation s=4.2 Hypothesized value of…

Q: Based on a recent​ study, the pH level of the arterial cord​ (one vessel in the umbilical​ cord) is…

A: Given, Mean = μ =7.23SD = σ = 0.13

Q: Suppose that sixteen-ounce bags of chocolate chips cookies are produced with an actual mean weight…

A: Given that,  Mean, mu= 16.1, standard deviation, sigma=0.1 We know that, z score= (X-mu)/sigma We've…

Q: Netflix: A study conducted by a technology company showed that the mean time spent per day browsing…

A: Sample size (n)=109Sample mean =21.6Population mean =20.6Standard deviation =7Test hypothesis: Claim…

Q: The contents of 40 cans of Coke have a mean of 12.15 fl oz and a standard deviation of 0.09 fl oz.…

A: Given, mean, x= 12.15 fl oz  standard deviation, σ = 0.09 fl oz population mean, μ = 12 fl oz X ~…

Q: Use the following scenario to answer the next 6 questions. An engineer has designed a valve that…

A: From the provided information, Sample size (n) = 30 Sample mean (x̅) = 4.8 Sample standard deviation…

Q: Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.2…

A: (a)

Q: A factory that manufactures bolts is performing a quality control experiment. Each object should…

A: Given Mean(x)=17.03standard deviation(σ)=0.11sample size(n)=50α=0.05

Q: During an economic​ crisis, the average value of homes in a community of 36 homes lost ​$9589 with…

A: Consider that μ defines the population mean amount homes.

Q: Based on a recent​ study, the pH level of the arterial cord​ (one vessel in the umbilical​ cord) is…

A: For a  random variable X of a standard normal distribution is known as the standard score or a…

Q: Can you explain null and alternative hypothesis using examples

A: Null and alternative hypotheses: Null hypothesis is a nullified statement about population parameter…

Q: The weight gains of animals during a period of confinement follow a normal distribution of mean 39.0…

A: A continuous random variable X is said to follow Normal distribution with parameters μ and σ2 if its…

Q: Watching TV: In  2015 , the General Social Survey asked a sample of  1312  people how much time…

A: The objective of this question is to determine whether the data provides sufficient evidence to…

Q: Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.6…

A: The question is about hypothesis testing.Given :Population mean time spent per visit (  ) = 20.6…

Q: Scores on the Critical Reading part of the SAT exam in a recent year were roughly Normal with mean…

A: The mean is 496 and the standard deviation is 115.

Q: Watching TV: In 2012, the General Social Survey asked a sample of 1320 people how much time they…

A: From the provided information, Sample size (n) = 1320 Sample mean (x̄) = 2.85 Standard deviation (s)…

Q: Suppose that another sample of resting heart rates for five Math students was obtained: 72, 68, 66,…

A: From the given data we want to know the data value .

Q: Which is cheaper: eating out or dining in? The mean cost of a flank steak, broccoli, and rice bought…

A: Let the population follows normal distribution approximately with unknown variance in such cases z…

Q: The p-value for this test is: Group of answer choices .01 < p < .05 .10 < p < .15 .05 < p < .10 .20…

A: The test statistic is, t=x¯-μsn=4.8-5.0130=-0.20.1826=-1.0953 The test statistic is -1.0953. The…

Q: Company ABC's customer retentions per site are normally distributed with a standard deviation of 21…

A: Solution: Let X be the Company ABC’s customer retentions per site. From the given information, X…

Q: Historically, a certain region has experienced 65 thunder days annually. (A "thunder day" is day on…

A: Given : sample mean = 53 sample standard deviation = 22 sample size = n = 11 Population mean = 62

Q: A company is doing a hypothesis test on the variation in quality from two suppliers. Both…

A: Given , Supplier 1 : Sample size = n1 = 31 Sample standard deviation = s1 = 4.0623 Supplier 2 :…

Q: A random sample of 75 medical doctors in Detroit showed that they worked an average of 55.1…

A: Conditions for Two sample Independent t test: The two samples are independent to each…

Q: Using traditional methods it takes 104.0 hours to receive a basic driving license. A new license…

A: Other steps after step 2  are missing so, I have provided decision based on both P-value as well as…

Q: A random sample of 58 apples are selected from an orchard and the weight of each apple is measured.…

A: Answer:- Given, sample size, n = 58  The mean weight, µ = 96.8  Standard deviation, σ = 16.6…

Q: The distribution of average hours of sleep per weeknight among college students is found to be…

A:

Q: An automatic coffee machine dispenses cups of coffee whose volume per cup varies normally with the…

A: Answer :

Q: The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine…

A: The population standard deviation is 92 hours.

Q: A new catalyst is being investigated for use in the production of a plastic chemical. Ten The ean…

A:

Q: We have collected data on the total number of minutes people spent in the local emergency room. The…

A: From the provided information, Mean (µ) = 166.9 min Standard deviation (σ) = 55.4 min Let X be a…

Q: Three samples of 4 observations each have been taken, with actual measurements (in centimeters) show…

A: Given Information: Samples Sample 1  Sample 2 Sample 3 12 12 12 12.3 12.4 12 11 12 11 12…

Q: d. The p-value = e. The p-value is ? a f. Based on this, we should Select an answer the null…

A: Sample size n=11Sample mean=95.8Standard deviation=20

Q: sample of 10 networking sites for a specific month has a mean of 26.1 and a standard deviation of…

A: We have given that  Sample size n =10 Population mean μ= sample mean =26.1  Standard deviation =4.2…

Q: Suppose that you expect college freshmen who live on campus will do better academically than those…

A: Given that  Sample Mean 1 (\bar X_1)(Xˉ1​) = 2.8932.893 Population Standard Deviation…

Q: The number of chocolate chips in a popular brand of cookie is normally distributed with a mean of 19…

A: Here, it is known that the mean, µ is 19, and the standard deviation, σ is 3.5.The z-score for the…

Q: One-Way Airfares The average one-way airfare from Pittsburgh to Washington D.C. is $236. A random…

A: According to the provided information, The hypothesis can be defined as:

Q: Q2: Serum amylase determinations were made on a sample of 15 apparently healthy subjects in the…

A: