Submit T Test: POST UNIT 6- TEST - Ch. 9 This Question: 1 pt 12 of 13 (12 compet
ID: 3324849 • Letter: S
Question
Submit T Test: POST UNIT 6- TEST - Ch. 9 This Question: 1 pt 12 of 13 (12 compete) This Test: 13 pls pos Questor, Help The accompanying data ret toal ravel tax ( in dolars) or a 3-day business tip in B randonly selected cihes A normal probbalty plot suggests the data could come from a population that is normally distributed A boxplot indicates there are no outliers Complede parts (a) theough (e) below 6828 7894 6944 8463 7982 0602 10069 9929 Cick the icon to view the table of critical t-vaues (a) Determine a point estimate for the population mean travel tax Round to two decimal places as needed ) Clck to select your answerts)Explanation / Answer
Solution:- Given data 68.28,78.94,69.44,84.63,79.82,86.02,100.69,99.29
a) A point estimate for the population mean travel tax is $ 83.39
mean = sum of terms/number of terms
= 667.11/8
= 83.39
b)option C. The lower bound is $73.32 and the upper bound is $93.46.one can be 95% confident that the travel tax for all cities is between these values.
=> mean = 83.39 , sd = 12.0476 , df = n - 1 = 7 , t = 2.365
=> X +/- t * s/sqrt(n) = 83.39 +/- 2.365 * 12.0476/sqrt(8) = (73.3163 , 93.4636)
c) option D. The researcher could decrease the level of confidence