Free dessert: In an attempt to increase business on Monday nights, a restaurant offers a free dessert with every dinner order. Before the offer, the mean number of dinner customers on Monday was  150 . Following are the numbers of diners on a random sample of  12  days while the offer was in effect. Can you conclude that the mean number of diners decreased while the free dessert offer was in effect? Use the  =α0.10  level of significance and the  P -value method to solve.     178 141 158 124 184 111 114 113 136 192 164 115   (a) Compute the value of the test statistic t=______

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A: Given that  Population mean μ =40

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Q: o test whether the mean time needed to mix a batch of material is the same for machines produced by…

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A: 2. Let μ be the population mean wrist extension for people using this new mouse design. The test is…

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A:

Q: When a data set has one or two values that are much higher than all of the others which of our 3…

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Q: In 1955, Life Magazine reported that a 25-year-old mother of three worked, on average, an 80 hour…

A: From the provided information, Sample size (n) = 71 Sample mean (x̅) = 83 Sample standard deviation…

Q: psychology student conducted a study on using a chief executive​ officer's facial structure to…

A: A psychology student conducted a study on using a chief executive​ officer's facial structure to…

Q: According to a study done in 2010, the mean number of sexual partners was 7.6. However, a…

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

Q: You have a dataset with a mean of 2, median of 3 and variance of 9.  What is the skewness?

A: Given that  Mean = 2 , Median = 3 , Variance = 9

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A:

Q: Mercury is a persistent and dispersive environmental contaminant found in many ecosystems around the…

A: a) Mean = 1.24 median = 0.57 There is heavy positive skewness in the data.

Q: A company wanted to determine the child care costs of its employees. A sample of 25 employees were…

A: Solution :  In above example a value of one of the sample change so we know that standard deviation,…

Q: A survey by a magazine stated that 14% of men said they used exercise to reduce stress. A random…

A: from the above datawe are given thatp=0.14n=100x=10p^=xnp^=10100p^=0.10Test…

Q: For his statistics assignment, Johnson examineddifferences in quality of grades obtained by students…

A: Johnson examined differences in quality of grades obtained by the students on regular program of a…

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Q: Maria owns and manages a small business, selling food via carts to people in the business district…

A: a) F statistic = Between-group variability​(MSB)/Within-group variability(MSW) = 9590.43/2572.67 =…

Q: If your 1st Term Score in this class is 38.42, and your 2nd Term Score is 43.83, what score do you…

A:

Q: The Congressional Budget Office reports that 36% of federal civilian employees have a bachelor's…

A: Note:Thank you for posting the question! Since your question has more than 3 parts, we have solved…

Q: A psychology student conducted a study on using a chief executive officer's facial structure to…

A:

Q: Is there a difference in the mean satisfaction level among the four airlines? Use the .05…

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A: Correct answer is (C)

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Q: One sample of n = 4 scores has a mean of M = 12, and a second smaple with n = 6 scores has a mean of…

A:

Q: 8. Rachel Ray has a popular FoodNetwork show, 30 Minutes Meals. However, in a study conducted by USA…

A: given that

Q: Manufacturer 1 2 3 19 29 21 26 26 19 24 32 24 27 25 16 (a) Use these data to test whether the p

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A: It is given that the mean times number of sick days differ for three levels of employees.

Q: A psychology student conducted a study on using a chief executive​ officer's facial structure to…

A:

Q: Q2) A researcher wants to know if the mean times (in minutes) that people watch their favourite news…

A: Given the data as TV Channel 1 TV Channel 2 TV Channel 3 45 15 72 12 43 37 18 68 56 38 50…

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A: It is given that n1 is 123 and n2 is 88.

Q: According to the most recent General Social Survey, 70% of adults watch TV nightly. A researcher…

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Q: The state Government gives grants to low-income undergraduate students. According to the National…

A: The given hypotheses are as follows: H0: µ = 2,600. Ha: µ ≠ 2,600. The sample size is 50 students,…

Q: Students in a representative sample of 65 first-year students selected from a large university in…

A: Sample mean (x̄) = 37.2Sample standard deviation (s) = 6.41Sample size (n) = 65

Q: A researcher believes there is a difference in the mean number of days before visible results begin…

A: let's set up the null hypothesis and alternative hypothesis null hypothesis: there is no difference…

Q: The mean number of sick days an employee takes per year is believed to be about 10. Members of a…

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Q: An adventure company runs two obstacle courses, Fundash and Coolsprint. The designer of the courses…

A: Given that an adventure company runs two obstacle courses, Fundash and Coolsprint.For Fundash:,,…

Q: A teacher collects the following data from 5 college students regarding the number of times they…

A: Given Information: Population mean is 4.0 Sample data: 6,5, 7, 6, 4  The objective is to test…