Question

Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard deviation of 1.00°C. A thermometer is randomly selected and tested Draw a sketch and find the temperature reading corresponding to the 88th percentile. This is the temperature reading separating the bottom 88% from the top 12%.

Which graph represents Psa? Choose the correct graph below 

The temperature for Pas is approximately _______ (Round to two decimal places as needed)  

Answer 1

The 88% should cover left 885 of the curve

hence D) is the correct option

Now we need to find $P_{88}$

Looking at the normla table

P[ Z < 1.275 ] = 0.88

Z = 1.275