1.The expression p(z<1.27 ) represents the area under the standard normal curve below the given value of Z.

What is P(z<1.27) ?

A. 0.1020

b. 0.1038

c. 0.8962

d.0.8980

2.The weights of apples in a bin are normally distributed with a mean of 143 grams and a standard deviation of 4.2 grams.

Approximately 30% of the apples weigh less than which amount?

A. 133 G

b.135 G

c.137G

d. 141 G

Beccca17 Apr 12, 2019

#1**+3 **

From pos z-score table 1.27 corresponds to .8980

From Negative z-score table -.52 standard deviations represents fraction .3015

-.52 standard deviations below the mean is 143 - .52(4.2) = ~ 141 gm

ElectricPavlov Apr 12, 2019

#1**+3 **

Best Answer

From pos z-score table 1.27 corresponds to .8980

From Negative z-score table -.52 standard deviations represents fraction .3015

-.52 standard deviations below the mean is 143 - .52(4.2) = ~ 141 gm

ElectricPavlov Apr 12, 2019