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Last name: Enter your LETTER answers HERE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 First name: Note: When done, using your last name and...
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Last name: First name: Enter your LETTER answers HERE 1 Note: 2 When done, using your last name and firstname, save THIS FILE as, 3 E270Lastname Firstname HW5 4 (No space between E270 and Last name) 5 E-mail to as an attachment. 6 7 Example: 8 E270Smith Adam HW5 YES 9 E270 Smith Adam HW5 NO 10 11 12 13 14 15 PAY ATTENTION 16 17 18 19 20 1 The expression means: a In repeated samples, you are 95 percent certain that the value of is µ. xX b c d The probability that that population mean deviates from the sample mean is 95%. 2 a 360 of these intervals to capture the actual population mean. b 355 of these intervals to capture the actual population mean. c 342 of these intervals to capture the actual population mean. d 95 of these intervals to capture the actual population mean. 3 a For a given sample size, a higher confidence level means a smaller margin of error. b For a given confidence level, a sample 16 times as large will make a margin of error one-fourth as big. c For a specified confidence level, larger samples provide smaller margins of error. d Both a and b are true. e Both b and c are true. [email protected] Ninety five percent (95%) of the means from samples of size n deviate from the population mean by no more than ±1.96 standard errors. Once you take a specific sample and calculate the value of , you are 95 percent certain that the value you xX calculated is µ. As part of the course requirement each student taking E270 is to build an interval with a 95% confidence level for the population mean monthly rent for two-bedroom apartments in Marion County. Each student is required to obtain a random sample of size n = 100 . The number of students participating in this project is 360 . After each student submits his/her interval estimate, the instructor would expect about Among the factors involved in building a confidence interval are: the sample size n, the level of confidence, and the margin of error. Which of the following statements are true? P(μ−1.96 σ/ X≤μ+1.96 σ/ )=0.95 √?≤± √?
Let's look at each choice: 4 1070 730 530 780 1050 1310 960 1380 1340 1090 530 1090 780 560 690 730 650 1240 1260 950 1490 500 910 1340 1140 850 980 1080 580 1300 810 980 1470 1450 1320 1080 1170 630 1410 840 1260 1230 980 1460 1210 560 1320 1020 1480 1410 890 900 1440 890 1080 720 1170 680 950 1220 680 880 1330 1400 990 520 820 860 1120 1430 1110 1280 540 1440 870 890 1330 740 1030 690 1400 640 950 580 1040 1090 580 1350 920 600 760 1350 540 1270 1340 1390 530 630 1440 1350 990 520 1320 1260 With a 95% confidence level, we expect the population mean to be within ±\$_____ from the sample mean. a \$65.9 b \$63.2 c \$61.4 d \$58.1 5 The following is a simple random sample of vehicle speed on I-465 during the morning rush hour. 25 62 65 45 33 29 38 25 54 The following is a simple random sample of monthly rents (\$) for two-bedroom apartments in Marion and surrounding counties.
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