What is the probability of randomly selecting a z-score less than z = –0.80 from a normal distribution.

a)-0.2119
b)0.7881
c)0.2119
d)-0.7881

Well, let me make you laugh while I answer your question.

Why did the scarecrow win an award?

Because he was outstanding in his field!

Now, let's calculate the probability. To find the probability of randomly selecting a z-score less than z = -0.80 from a normal distribution, we can look up the value in a standard normal table or use statistical software.

The correct answer is option a) -0.2119. Just remember, probabilities can't be negative, so the answer can't be d). Don't worry, we all make mistakes sometimes!

To find the probability of randomly selecting a z-score less than z = -0.80 from a normal distribution, we need to use a standard normal table or calculator.

The standard normal table gives the probabilities associated with various z-scores. For a negative z-score, we need to look up the area under the curve to the left of that z-score.

From the standard normal table, the area to the left of z = -0.80 is approximately 0.2119 (rounded to four decimal places). Therefore, the probability of randomly selecting a z-score less than z = -0.80 from a normal distribution is 0.2119.

So, the correct answer is option c) 0.2119.

To find the probability of randomly selecting a z-score less than z = -0.80 from a normal distribution, you need to use a standard normal distribution table or a statistical calculator.

Here's how you can find the answer using a standard normal distribution table:

1. Look up the z-score -0.80 in the table.
2. The table will give you the area/probability to the left of the z-score.
3. Since we are looking for the probability of a z-score less than -0.80, we need to find the area/probability to the left of the z-score.
4. In the table, you will find that the area to the left of -0.80 is 0.2119 (rounded to four decimal places).

Therefore, the correct answer is Option c) 0.2119.

This can be done without even looking at any tables, assuming the correct answer is in there

First of all, rule out the two negative results, prob's can't be negative
a z score of 0 would be .5
any negative z-score would be < .5
So there is only one choice, namely C) .2119