Question

(1 point) The summer monsoon rains in India follow approximately a Normal distribution with mean 852 millimeters (mm) of rainfall and standard deviation 82 mm. Note: Use Table A to nnd the proportion or percentage below (a) In the drought year 1987, 697 mm of rain fell. In what percent of all years will India have 697 mm or less of monsoon rain? (b) "Normal rainfall. means within 20% or the long-term average, or between 683 mm and 1022 mm in wrat percent of all years is the rainfall normal? (1 point) After the physical training required during World War lI, the distribution of mile run times for male students at the University of llinois was approximately Normal with mean 7.11 minutes and standard deviation 0.74 ninutes. What proportion of these students could run a mile in 6 minutes or less?

Answer 1

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사 852 1『,8 2 p (X< 631)-p(zく637-852 ust standard = 2.34小 tendund Nonmal to ble 96 114. 6 74 PfXC6) =0,06681