Harry's Hamburgers claims that the residents of Harryville eat at the hamburger chain anaverage of exactly 18 times per year. You took a sample of 48 residents of Harryville andfound that the sample mean was 17. The sample standard deviation was 4.5. You want to testto see if Harry's claim can be disputed with a significance level of 0.05.For each number in the problem, give the appropriate mathematical symbol associated withthat number:18 = Use the Margin of Error to calculate a confidence interval. State the confidence interval belowas a compete sentence, using the format shown in Module 12.90.Round your numbers to one decimal point.

Step 1: List the given values. We know that Harry's Hamburgers claims that the residents of…

Answered: Harry's Hamburgers claims that the…

ENGR.ECONOMIC ANALYSIS

14th Edition

ISBN:9780190931919

Author:NEWNAN

Publisher:NEWNAN

Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

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K The first statistics exam had a mean of 71 and a standard deviation of 15 points; the second had a mean of 82 and a standard deviation of 5 points. Anna scored a 84 on both tests. Megan scored 94 on the first exam and 74 on the second. They both totaled 168 points on the two exams, but Anna claims that her total is better. Explain. The total of Anna's z-scores is, which is greater than Megantotal of (Round to one decimal place as needed.)
Consider the following data: 3,10, -3, -4, – 11, −5 Step 2 of 3: Calculate the value of the sample standard deviation. Round your answer to one decimal place.
ou would like to get the highest paying job possible after graduating from UCR and are currently deciding vhether to enroll in ECON 108 in the fall term or not. You find a sample of recent UCR graduates that majc n Economics (there are no double majors in the samples). You sampled 100 Economics majors that took ECON 108 and you find that the average starting salary is 72K dollars, with a sample standard deviation of 10K dollars. You sampled 75 Economics majors that did not take ECON 108 and you find that the average starting salary is 65K dollars, with a sample standard deviation of 15K dollars. Which of the following statements is most correct? O I am not very confident in the results of my hypothesis test because the range in which I fail to reject the null hypothesis is relatively large. O I want to be very confident in the results of my hypothesis test, so the range in which I fail to reject the null hypothesis is relatively large. O The range in which I fail to reject is small, so…
In one of its Spring catalogs, L.L. Bean advertised footwear on 29 of its 192 catalog pages. Suppose we randomly surgery 20 pages. We are interested in the number of pages that advertise footwear. Each page may be picked at most once. Calculate the standard deviation
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 1.80 gallons. From his records, he selects a random sample of 80 sales and finds the mean number of gallons sold is 6.90. What is the point estimate of the population mean? (Round your answer to 2 decimal places.) Develop a 95% confidence interval for the population mean. (Use z Distribution Table.) (Round your answers to 2 decimal places.)
Show your work A stenographer claims that she can take dictation at the rate of 120 words per minute. Can we reject her claim on the basis of 100 trials in which she demonstrates a mean of 116 words with a standard deviation of 15 words? Use 5 per cent level of significance.
A large milling machine produces steel rods to certain specifications. The machine is considered to be running normally if the standard deviation of the diameter of the rods is at most 0.42 millimeters. The line supervisor needs to test the machine is for normal functionality. The quality inspector takes a sample of 45 rods and finds that the sample standard deviation is 0.49. What is the test statistic? Select one: а. 59.89 b. 48.63 с. 50.50 d. 52.45
In 2017, Americans spent a record-high $9.1 billion on Halloween- related purchases (the balance website). Sample data showing the amount, in dollars, that 16 adults spent on a Halloween costume are as follows. 13 69 23 65 32 36 31 43 52 17 13 95 46 32 66 24 a. What is the estimate of the population mean amount adults spend on a Halloween costume (to 2 decimals)? $ 41.06 b. What is the sample standard deviation (to 2 decimals)? $ c. Provide a 95% confidence interval estimate of the population standard deviation for the amount adults spend on a Halloween costume (to 2 decimals). Use Table 3 of Appendix B. $ 17.14 ≤0≤ $
Suppose a baker wants to know, on average, how many pastries they sell in a day. They sampled over 4 days. On the first day they sold 10, on the second day they sold 12, on the third day they sold 18, and on the fourth day they sold 16. The population standard deviation of pastry sales is 3. What is the point estimate (average) number of pastries sold? 26 08 056 O 14 Nex
An insurance agent claims that the average age of Age last Number of policy-holders who insure through him is less than the average age for all birthday (yrs) the agents, which is 30-5 years. A random sample of 100 policy-holders who had insured through him gave the adjoining age distribution. Calculate the mean and standard deviation of the sample and use it to test the claim that the average is less than the figure for all the agents at 5% level of significance persons 16-20 12 21-25 22 26 30 20 31-35 30 36-40 16
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10. 7 students were asked how many pencils they had. The responses were 2, 5, 8, 3, 1, 6, and 4. a. Calculate the sample mean 8. Find the sample standard deviation C Find the Q1, Q3, and the interquartile range.

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