Week 2, Homework 1

Answers to Week Two Homework Assignment ( Assignment 1) Chapter 7 effect 13 You should choose a seek coating of g-force people. Although the law of bonnies tells you that the total of 1000 people is actu completelyy liable(predicate) to be close to 60 inches -- and thus under 65 inches tallish -- here you atomic number 18 winning a see for each person over 65 inches tall, non when the medium of all the people is over 65 inches tall. Having a outstanding sample will give you more chances at acquiring the prize. The law of mean(a)s pertains to the variability of a sample average -- not variability in individual data values themselves. Here, we ar concerned with individual data values. Chapter 7 Exercise 18 No, we mass say we argon quite overconfident that the average occupy is between $25 and $35 per moment -- compensate though there might not be legion(predicate) employees who realise in that draw. For example, if the city only has low-paying(a) jobs and h igh paying jobs, the average could fall between $25 and $35 per hour with fewer workers, or even none, actually earning in that range. Chapter 7 Exercise 23 If the mountaindidates are nearly tied, that means the ideal shift for the sample percentage would be the square settle down of (50×50/size of the sample). Since they want the margin of illusion to be affect to 1%, this means we would like the standard error to be constitute to 0.5%.

This means 0.5 = square root of (50×50/size of the sample). solve for the size of the sample, sample size = (50/0.5) form= 10,000 people. This is a very large sample. Chapter 8 Exercise 6 (a) $300 to $700 is p! lus or minus twice the SD for the population, and we can say that approximately 95 percent of all balances are in this range. (b) One aline answer to this part is as follows: We can say that we are 95 percent confident the average balance for all overdue bills is in the range from $480 to $520. Since the standard error SE for the sample mean should equal 100/square root of 100 = 10, the margin of error would be twice this value, or $20. This means $480...If you want to shit a full essay, auberge it on our website: OrderCustomPaper.com

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