Uulut
emi computes the mean and variance for the population data set 87, 46, 90, 78, and 89. she finds the mean is 78. her
steps for finding the variance are shown below.
(87 - 78)2 + (46 - 78)? +(90- 78)2+(78-78)2 + (89 - 78) 2
(9)2-(32)? +(12)2+(0)+(11)2
81 - 1,024 + 144 + 0 + 121
-678
--135.6
what is the first error she made in computing the variance?
emi failed to find the difference of 89 - 78 correctly
emi divided by n-1 instead of n.
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The first error she made in computing the variance was to have placed -1,024 instead of +1,024

Step-by-step explanation:

we have the data set

87, 46, 90, 78, and 89

step 1

Find the mean

step 2

Subtract the Mean for each value of data set and square the result  and then adds the numbers

so

The first error she made in computing the variance was to have placed -1,024 instead of +1,024

step 3

Work out the mean of those squared differences

----> this value is called the "Variance"

8

step-by-step explanation:

to find the amount of gift bags to use all the supplies, find the gcf or greatest common factor. this is the largest number which multiplies evenly into each term.

48 has factors: 1, 2, 3, 4, 6, 8, 12. 16, 24, 48

80 has factors: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

64 has factors: 1, 2, 4, 8, 8, 16, 32, 64

the highest number factor they all share in common is 8. this means there will be 8 bags with 6 pencils, 10 markers, and 8 stickers in each bag.