A random sample of the closing stock prices in dollars for a company in a recent year is listed below. Assume that o is $2.33. Construct the 90% and 99% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. 16.14 17.75 20.31 18.74 15.16 20.92 17.88 15.25 21.46 16.48 15.11 21.75 20.25 18.37 19.71 18.67 The 90% confidence interval is ($$) (Round to two decimal places as needed.)

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A random sample of the closing stock prices in dollars for a company in a recent year is listed below. Assume that o is
$2.33. Construct the 90% and 99% confidence intervals for the population mean. Interpret the results and compare the
widths of the confidence intervals.
16.14
17.75
20.31
18.74
15.16
20.92
17.88
15.25
21.46
16.48
15.11
21.75
20.25
18.37
19.71
18.67
The 90% confidence interval is ($ $)
(Round to two decimal places as needed.)
Transcribed Image Text:A random sample of the closing stock prices in dollars for a company in a recent year is listed below. Assume that o is $2.33. Construct the 90% and 99% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. 16.14 17.75 20.31 18.74 15.16 20.92 17.88 15.25 21.46 16.48 15.11 21.75 20.25 18.37 19.71 18.67 The 90% confidence interval is ($ $) (Round to two decimal places as needed.)
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Transcribed Image Text:TI-84 Plus A TEXAS INSTRUMENTS he end pg up pg dn EInterval Inpt:Data State g:2,33 18.37 n:15 C-Level:.9 Calculate 8. e pg up STAT PLOT F1 TBLSET F2 FORMAT F3 CALC F4 TABLE FS -> Y= WINDOW TRACE GRAPH ZOOM 3 pg dn QUIT INS 2ND enter MODE DEL A-LOCK LINK LIST ALPHA X,T,e,n STAT ins del TEST A ANGLE B DRAW C DISTR MATH CLEAR APPS PRGM VARS MATRIX D TT H Bố SIN- E COs- TAN- G x-1 SIN COS TAN %3D e M EE J { K } L (intel 10 N CORE 17 V P IRIS PL SRAPRIC LOG 10TH GEN 7 6. ex s L4 T L5 U L6 V LN 4. 6. RCL X MEM " STO) LI Y L2 Z L3 e FF ENTRY SOLVE 1 3 ENTER ON CATALOG ANS 7 (-) (值(O))
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