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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?

Respuesta :

Answer:

I'm pretty sure it's 0.60

Step-by-step explanation:

Answer:

Mean for 2nd week increased by 6.51 % or by  0.6 value compared to the 1st week.

Step-by-step explanation:

Money spend in 1st week = 12.48 , 9.50 , 10.25 , 4.99 , 8.59

Total Money Spend in 1st week = 12.78 + 9.50 + 10.25 + 4.99 + 8.59 = $ 46.11

In 2nd week he spend $3 more.

So total Money Spend in 2nd week = 46.11 + 3 = $ 49.11

[tex]Mean=\frac{Sum\:of\:observation}{Total\:number\:of\:observation}[/tex]

Mean of 1st week = [tex]\frac{46.11}{5}=9.222[/tex]

Mean of 2nd week = [tex]\frac{49.11}{5}=9.822[/tex]

So, increase in mean from 1st week = [tex]\frac{9.822-9.222}{9.222}\times100=6.51\:[/tex] %

Therefore, Mean for 2nd week increased by 6.51 % or by  0.6 value compared to the 1st week.