11. Which of the following are required to determine the sample size necessary to estimate a population mean? (a) knowledge about or an estimate of the population variance (b) statement of the degree of precision desired (c) statement of the degree of confidence desired (d) band c (e) a, b, and cA section of standard normal table: 0.0 0 03 0 05 D. OF 0.07 10007 1002 .0002 0012 0002 0002 Table entry DO03 0003 0003 .DO03 0003 DO03 0003 10003 0904 0004 0004 -33 0005 0005 0005 0904 0004 FOODS 0005 -32 1005 0006 1005 0007 1.1 DO10 0009 0009 .0009 .0013 0013 0013 DO12 0012 001 1 1001 1 0011 0010 0010 -29 0019 0018 0018 .0017 0016 .0016 .0015 0015 9014 0014 -28 0023 0023 0022 1021 6021 M120 0019 1028 0027 -27 0035 0034 0033 1032 0031 1030 0045 0044 0041 0038 0037 8038 -26 DO47 -25 0062 0060 0059 .0057 0055 0054 .0052 0051 0049 0045 -24 0078 0075 0073 8064 .0102 1099 1094 10091 10089 -21 0107 0104 0116 0113 .0110 -22 0139 0136 0132 .0129 0125 .0122 0119 0170 0165 0162 .0158 .0154 0150 0146 0143 -21 0179 017 -20 0728 0272 0217 ,0212 0307 0202 .0197 0152 0198 01 83 .0250 0244 10239 0233 -19 0287 0241 0274 0265 0282 0256 020 0359 0351 0314 .0336 0329 0322 10314 0307 0301 8357 -1.7 .0446 0436 0427 .0418 0409 0401 0392 0354 0375 045 -1.6 0548 0537 0526 .0515 .0905 .0495 .0485 0475 0485 0659 -1.5 0656 .0643 .0630 0618 .0606 0594 0682 0571 -14 .0808 0793 0778 .0764 0749 .0735 .0721 0708 0681 0853 0838 -13 0968 0951 0934 0918 0901 0985 10369 1151 .1131 -1112 .1093 .1075 .1056 1034 1020 -1003 -12 -1190 .1170 -1.1 .1:357 -1335 -1314 .1292 -1271 .1251 .1230 .1210 .1469 .1423 -1401 .1379 -10 .1587 -1562 -1539 .1515 -1492 .144510. x is a random variable representing sales [5} of product ABC in a store of a department store Eigsfscountsmop, over 1 week. This department store has 11D stores nationwide: 12 in Northeast region, ill) in southwest region and 2 in Northwest region. A research analyst took 12 stores in Northeast region as a sample and observed their sales of product ABE in 1 week. Average sales is $23,300 and standard deviation of sales is $12,4. Which statement below is correct? [a] Based on this sample it can be concluded that, statistically speaking, average of nationwide weekly sales of product ABC. is $23,3DB. [b] Based on this sample it can be concluded that, statistically speaking, average of nationwide weekly sales of product ABC is at least $23,3m {c} Based on this sample it can be concluded that, statistically speaking, average of nationwide weekly sales of product ABE is less than $23,301}. [d] Based on this sample we cannot make any statistically'informed statement on average of nationwide weekly sales of product ABC. {e} Based on this sample data a 55% condence interval of nationwide weeklyr sales of product ABC is between 51?,353 and $19,2DE. 12. A researcher collects a small sample and finds that he does not have sufficient evidence to draw a conclusion. He then makes additional observations and finds this evidence inconclusive. He continues making observations until a conclusion can be drawn. He is using: (a) random sampling (b) fixed sampling (c) sequential sampling (d) the principle of diminishing utility (e) nonprobability sampling8. Below data is for sales figures for population of customer of a brand of specialized computer server: Customer ID Sales (S) 1 1,400,000 2 2,340,000 3 4,500,300 4 980,000 5 3,400,000 What is population standard deviation (rounded to whole dollar value)? (a) 1,345,000 (b) 1,445,191 (c) 1,292,618 (d) 890,430 (e) 1,400,0009. What issue do you see in below question included in a survey: \"What is your age [in year]? {I} less than 10 fit} between 11 and 20 (H!) between 21 and 30 {W} above 41\" [e] Options are not mutually exclusive. [b] Options are not exhaustive. [12} both [a] and {u}. [d] No issue, the question is ne. {e} Options are incorrectly ordered