Question

Help Please?

Answer 1

The table shows data for a class's mid-term and final exams:

Mid-Term Final
98 99
98 93
93 93
90 93
88 88
82 86
78 80
75 78
75 78
70 78
68 72

Which data set has the largest standard deviation?
Mid-term exams
Final exams
They have the same standard deviation.
There is not enough information.

Answer 2

how can we help you?

Answer 3

@rvc

Answer 4

do you know how to do standard deviantion?

Answer 5

@BugzytheGreat

Answer 6

We'd need to find the mean, am I right?

Answer 7

Step 1. Work out the mean. In the formula above μ (the greek letter "mu") is the mean of all our values ... ...
Step 2. Then for each number: subtract the Mean and square the result. ...
Step 3. Then work out the mean of those squared differences. ...
Step 4. Take the square root of that:

Answer 8

ok

Answer 9

may you guys help me w. all of that ?

Answer 10

sure so start off by finding the mean of both the midterm and final

Answer 11

yep

Answer 12

Finding the mean is easy. take all the numbers, add them up, and then divide them by the amount of numbers there are.

Answer 13

ok hold on

Answer 14

83.1818 so so on

Answer 15

guys?

Answer 16

whats the mean for the finals

Answer 17

r u sure that the mean for mid-term is 83.1818

Answer 18

yes it is

Answer 19

ok so what next> i am kind of on a time limit and i have a lot oof questions so ....

Answer 20

can we kind of hurry this up?

Answer 21

whats the mean for the finals

Answer 22

its 85.27

Answer 23

ok

Answer 24

now subtract 83 from all the mid term grades and 85 from all the final grades

Answer 25

the answer is b right @rvc @jprose

Answer 26

yes

Answer 27

yep
\(\huge\color{red}{\checkmark}\)
All the best :)

Answer 28

would you mind helping me w. another

Answer 29

sure

Answer 30

The box plots show attendance at a local movie theater and high school basketball games:

two bar graphs shown. The top one is labeled Movies. Minimum at 130, Q1 at 162, median at 185, Q3 at 195, maximum at 290. The bottom bar graph is labeled Basketball games. Minimum at 85, Q1 at 170, median at 200, Q3 at 225, maximum at 230.

Which of the following best describes how to measure the spread of the data?

The IQR is a better measure of spread for movies than it is for basketball games.
The standard deviation is a better measure of spread for movies than it is for basketball games.
The IQR is the best measurement of spread for games and movies.
The standard deviation is the best measurement of spread for games and movies.

Answer 31

what do you think it is

Answer 32

d? @rvc @jprose

Answer 33

thats right i think

Answer 34

im not so sure :(

Answer 35

i think @jprose is correct

Answer 36

no its not i got it wrong my first time so thats not right

Answer 37

i have to go but i will be back at 12:47 see ya then thanks

Answer 38

@jprose @rvc