Normal probability distribution | Mathematics | Page 1

modern sentinel Feb 6, 2024, 2:26 AM

#

Is this correct?

zealous jewelBOT Feb 6, 2024, 2:27 AM

#

modern sentinel Feb 6, 2024, 2:29 AM

#

<@&286206848099549185>

hidden plaza Feb 6, 2024, 2:32 AM

#

Is 53 your mean?

modern sentinel Feb 6, 2024, 2:32 AM

#

Yes

hidden plaza Feb 6, 2024, 2:32 AM

#

What’s your stddev?

modern sentinel Feb 6, 2024, 2:33 AM

#

2

hidden plaza Feb 6, 2024, 2:34 AM

#

One standard deviation is 2?

modern sentinel Feb 6, 2024, 2:36 AM

#

How do you get the standaed deviation?

hidden plaza Feb 6, 2024, 2:36 AM

#

What’s your sample?

modern sentinel Feb 6, 2024, 2:37 AM

#

hidden plaza Feb 6, 2024, 2:37 AM

#

modern sentinel How do you get the standaed deviation?

You calculate it from variance

#

Ah ok standard deviation must be 7

#

In that case use this as reference

#

#

So x>67 would be the percentage greater than two standard deviations above the mean

#

So 2.3+0.1=2.4%

#

The second one would be 13.6+34.1+34.1=81.8%

#

Does that make sense?

#

You’re probably using a z-table right?

modern sentinel Feb 6, 2024, 2:44 AM

#

hidden plaza Does that make sense?

Yess

modern sentinel Feb 6, 2024, 2:44 AM

#

hidden plaza You’re probably using a z-table right?

I'm using z-table

hidden plaza Feb 6, 2024, 2:45 AM

#

Ok so on your z-table you have to find the corresponding z score

#

1 standard deviation below the mean is -1 on the z-table

modern sentinel Feb 6, 2024, 2:46 AM

#

I already know how to use the z table

hidden plaza Feb 6, 2024, 2:46 AM

#

Ok perfect

modern sentinel Feb 6, 2024, 2:46 AM

#

So the answer is 0.8185?

hidden plaza Feb 6, 2024, 2:46 AM

#

Yes

#

You got it!

modern sentinel Feb 6, 2024, 2:46 AM

#

How about x>67

#

The standard deviation is still 7 and the mean is 53

#

Is 0.4772 correct?

#Normal probability distribution