Normal Distribution 查表测一测

What is the the total area under the standard normal distribution curve?

• 100

• 25

• 0.5

• 1

Which is NOT true about the standard normal distribution curve?

• It is bell-shaped.

• The mean, median, and mode are equal

• The smaller the standard deviation, the less spread in the curve.

• It is asymmetrical (not symmetrical).

 $P\left(Z\ge0.218\right)=$  _____________

 $P\left(0.65<Z<1.73\right)=$  ___________

 $P\left(Z<-0.342\right)=$  ___________

 $P\left(-0.5<Z\le1.6\right)=$  ___________

 $P\left(\left|Z\right|<2.03\right)=$  ___________

 $P\left(Z>a\right)=0.28,\ a\ =$  __________