Question

The first week at Javier's new job he spent $12.48, $9.50, $10.25, $4.99, and $8.59 on lunch.

In the second week, he spent $3 more in total for the 5 lunches than the first week.

What is the increase in the mean for the second week compared to the first?

Answer 1

heeeLLLLPPP

Answer 2

@Vocaloid could you help me?

Answer 3

@Ultrilliam could YOU help me?

Answer 4

@Hero ?

Answer 5

the way they *want* you to do it is to calculate the mean before adding the 3 dollars; then the mean after the 3 dollars are added, then find the difference between the two

however, since they only care about the increase, you can simply divide the amount of increase ($3) by the total number of lunches (5)

Answer 6

so would it be $2.43?

Answer 7

you might be overthinking this a bit

the total increase is $3
the total # of lunches is 5

so the mean (average) increase per lunch --> $3 divided by 5 lunches --> 3 divided by 5 --> convert to a decimal since this is money

Answer 8

oh I see so I would add 0.6 to each individual value and then find the mean and then the difference between the two?

Answer 9

they're just asking for the mean increase so the solution is just 0.60

Answer 10

oh

Answer 11

ok

Answer 12

Thanks!!