for example:

**Find the probability of getting a z-score less than 0.90 in a standard normal distribution.**

-as we can see, the normal distribution is equal to 1 and the middle or the mean is 0.50. Like in fraction, 0.75 is about three fourth (3/4) in normal standard curve and it is approximately between the mean and in 1 standard deviation.

-in solving the the probability of getting a z-score less than 0.90 is:

**normalcdf(-5,0.90)**is equal to o.8159 or 0.82.

-by using a calculator, you simply first:

*the home screen must be cleared and press

**2nd.**

*****then, hit the

**VARS**

*****next is press 2 to move in

**normalcdf(**

*after that it will back to home screen with

**normalcdf(**, and just add like

**normalcdf(-5,0.90).**

**NOTE: you must always put an closing brackets after you put the numbers.**

another example is:

**What is the z-score if the probability of getting less than this z-scroe is 0.65?**

-in solving this question, we will use

**invNorm**, because the question ask is not about the area compare to the first one.

*first, press

**2nd**

*then,hit the

**VARS**key again just like the procedure in using

**normalcdf(**

*next is, press 3

*after that, put the numbers like

**invNorm(0.65)**is equal to 0.3853 or 0.39.

the last question would be is:

**What is our assignment today?**

guys sorry for being kind of late in blogging our lecture today, I hope you will correct me if i have mistakes.

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