. Beatrice is graduating from college this semester and has received two job offers, one in city A andone in city B. To help her decide where to move, she would like to estimate the difference in averagehome prices for these two cities. From a random sample of 40 listings in city A the average home priceis $190,000 and from a random sample of 40 listings in city B the average home price is $185,000.She finds that the margin of error for a 95% confidence interval for the difference in average homeprice between the two cities (A-B) is $3,250. Which of the following conclusions is correct?(A) Beatrice can be 95% confident that the average home price is between $1,750 and $8,250 morein city A than in city B.(B) Beatrice can be 95% confident that the average home price is between $1,750 and $8,250 less incity A than in city B.(C) Beatrice can be 95% confident that the average home price is $5,000 less in city A than in city B.(D) Beatrice can be 95% confident that the average home price is $5,000 more in city A than in city B.(E) Beatrice can be 95% confident that there is not a significant difference in the average home pricebetween these two cities.

First, we need to interpret the margin of error given for the 95% confidence interval for the…

Answered: . Beatrice is graduating from college…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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1. Use the results of simulation to appropriate the margin of error for hackers estimate of the proportion of students at his school that can roll their tongue 1b . Interpret the margin of error
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The owner of a chain of mini-markets has two stores, Store 1 and Store 2, in one city. She recently added a breakfast station in Store 1 and wants to determine if the mean daily sales of Store 1 is greater than the mean daily sales of Store 2. After choosing 12 days at random, she records the sales (in dollars) at Store 1 for these days. Then, she records the sales at Store 2 for these same days. The data and the differences (Store 1 minus Store 2) are shown in the table below. Day 1 2 3 4 5 6 7 8. 9. 10 11 12 Store 1 951 547 437 682 547 729 488 776 461 815 859 518 Store 2 989 599 500 680 451 528 452 741 446 758 960. 421 Difference (Store 1 − Store 2) −38 −52 63 2 96 201. 36 35 15 57 −101 97 Send data to calculator Send data to Excel (a)Are the two samples of daily sales amounts independent or paired…
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See picture for questions A and B Problem Felipe and John each graduated from college last year and got entry-level positions. Felipe got an entry-level position as a software engineer with a salary of $59,416, and John got an entry-level position as a nurse with a salary of $78,633. Last year, the distributions of entry-level salaries were clearly bell-shaped for software engineers and for nurses. That year, the entry-level salary of software engineers had a population mean of $63,000 and a standard deviation of $2200, and the entry-level salaries of nurses had a population mean of $71,000 and a standard deviation of $2700.
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Suppose Laura, a facilities manager at a health and wellness company, wants to estimate the difference in the average amount of time that men and women spend at the company's fitness centers each week. Laura randomly selects 15 adult male fitness center members from the membership database and then selects 15 adult female members from the database. Laura gathers data from the past month containing logged time at the fitness center for these members. She plans to use the data to estimate the difference in the time men and women spend per week at the fitness center. The sample statistics are summarized in the table. Population Populationdescription Population mean(unknown) Samplesize Sample mean(min) Sample standarddeviation (min) 11 male μ1 n=15 x¯1=137.7 s=51.7 22 female μ2 n=15 x¯2=114.6 s=34.2 df=24.283 The population standard deviations are unknown and unlikely to be equal, based on the sample data. Laura plans to use the two-sample ?-t-procedures to estimate the…
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