Question

The question says a normal distribution has a mean of 18 and a standard deviation of 3. Find the probability that a randomly selected x-value from the distribution is in the given interval.

1. Between 18 and 21
2. Between 12 and 18
3. At least 27
4. At most 12
PLEASE SOMEONE HELP!

Answer 1

@jagr2713

Answer 2

@aum

Answer 3

@Jim_thompson5910

Answer 4

Please help

Answer 5

do you not know what to do?

Answer 6

@nincompoop No I do not can you please help me

Answer 7

@jim_thompson5910:

Answer 8

@astrophysics

Answer 9

Help please ^^^^

Answer 10

@nincompoop u acting like your going to help me!

Answer 11

@Satellite73 may you please help me

Answer 12

1. 34.1%
2. 47.7%
3. 0.13%
4. 2.2%

Answer 13

@mia99 neither of those are a answer choice. Would u like to see the answer choices?

Answer 14

that would be good

Answer 15

@mia99 Thanks a lot!

Answer 16

@mia99 Do u understand the picture?

Answer 17

yeah my answers were correct i just put it in percentage instead of decimal
i will rewrite it corectly

Answer 18

Okay thank you

Answer 19

1. 0.34
2. 0.475
3. 0.0015
4. 0.025

Answer 20

@mia99 Thank you so much! Do u mind helping me with something else?

Answer 21

sure if i know how to do it though
What is it?

Answer 22

The question says.
A normal distribution has a mean of 50 and standard deviation of 5.

1. P(x <or equal to 50)
2. P(x< or equal to 55)
3. P(x< or equal to 40)
4. P(x< or equal to 62)
5. P(x< or equal to 47)

😊

Answer 23

@mia99 ^^

Answer 24

1. 0.5
2. 0.841
3. 0.227
4. 0.991
5. 0.274

Answer 25

they may be off a little because each calculator is different

Answer 26

@mia99 Omg! Your a lifesaver seriously

Answer 27

ha ha ur welcome!!

Answer 28

@mia99
Can you help with finding sample size?

Answer 29

im not sure but i will give it a try

Answer 30

Okay.

Find the sample size required to achieve the given margin of error. ( do not round as you work the problem )


1.+- 7%
2. +- 6%
3. +- 8%
4. +- 9%
5. +- 3.5%
6. +- 2.2%
7. +- 4.8%
8.+- 1.7%

Answer 31

@mia99 ^^^

Answer 32

Here are the answer choices

Answer 33

yeah im so sorry i dont know how to do that

Answer 34

Awww man 😔 thanks anyways

Answer 35

soo sorry again..

Answer 36

@mia99 what about this 6-10

Answer 37

sorry