Cellus Find the standard deviation of
the given data rounded to the
nearest hundredth.
147, 141, 120, 124, 128

Step-by-step explanation: Set up the formula for sample standard deviation. The standard deviation of a set of values is a measure of the spread of its values.

s=

n

∑

i=1

√

(xi-xavg)2

n-1

Set up the formula for standard deviation for this set of numbers.

s=

√

(147-132)2+(141-132)2+(120-132)2+(124-132)2+(128-132)2

5-1

Simplify the result. s=

√

530

2

The standard deviation should be rounded to one more decimal place than the original data. If the original data were mixed, round to one decimal place more than the least precise.

11.5

step-by-step explanation:

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!