Question

21 of 48 30 Prices of shoes in a department store are distributed normally. The distance (d) of the price (p) of each pair of shoes from the mean price of $74 was computed as follows: d Ip- 74 If d is greater than 20 for approximately 32% of the pairs of shoes in the store, what is the approximate standard deviation of the shoe prices? A $6.40 B. $10.00 o C.$20.00 D $23.68

Answer 1

P(Z0.5-0.16 The corresponding value of Z from standard Normal table is 0.99 20 0.99-20 20 0.99 Thus, the approximate standard deviation of shoes price is S 20. Hence the option C) is correct. 31) y#5+3(h-1 ) ,h:1 , 2, 3, 4 If we put h-1 then y-5+3(1-1) 5+o-5 If we puth-2 then y-5 +3(2-1)5 +38 If we puth-3 then y-5+3 3-1)-5 +6 11 If we put h-4 then y-s+3(4-1)-5-9 -14 Thus, the reasonable range is 5 s y s 14 Hence the option B) is correct