Adimas found the mean of her 11 math test scores for the first semester. x = StartFraction (76 + 87 + 65 + 88 + 67 + 84 + 77 + 8

Question

3 years ago

6

Adimas found the mean of her 11 math test scores for the first semester. x = StartFraction (76 + 87 + 65 + 88 + 67 + 84 + 77 + 8

2 + 91 + 85 + 90) Over 11 EndFraction = StartFraction 892 Over 11 EndFraction ≈ 81 Using 81 as the mean, find the variance of her grades rounded to the nearest hundredth. σ2 = Find the standard deviation of her grades rounded to the nearest hundredth. σ =

Mathematics

2 answers:

Lilit [14] · Answer 1 · 2022-02-11T18:30:50+03:00

Lilit [14]3 years ago

7 0

Answer:

71.36 and 8.45

Step-by-step explanation:

Maslowich · Answer 2 · 2022-02-11T20:50:08+03:00

Maslowich3 years ago

4 0

Answer:

σ2 =71.36

σ = 8.45

Step-by-step explanation: