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NemiM
19 days ago
9

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 f

inding the variance are shown below. mc008-1.jpg 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. Emi evaluated (46 - 78)2 as -(32)2. Emi forgot to take the square root of -135.6.
Mathematics
2 answers:
AnnZ [9K]19 days ago
7 0
Let’s determine the actual mean

First, we sum all the values

87+46+90+78+89 = 390

Then, we divide 390 by the count of numbers present.

390/5 = 78

Thus, the mean is 78

Emi did not manage to calculate the difference
tester [8.8K]19 days ago
4 0
Correct answer is C. <span>Emi evaluated (46 - 78)2 as -(32)2.</span>
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Answer:

________{0.50 if x < 3

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Step-by-step explanation:

Based on the details provided:

Employees with less than 3 years receive an increase of $0.50 hourly

Employees with at least 3 years but under 6 years receive $1.00 increase hourly

Employees with a minimum of 6 years and less than 9 get $1.50 increase hourly

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This information can be expressed as a piecewise function:

________{0.50 if x < 3

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The conditions are outlined in the piecewise function above with x indicating the number of years employed.

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27 days ago
Suppose you have two urns with poker chips in them. Urn I contains two red chips and four white chips. Urn II contains three red
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8 0
12 days ago
A series contains 18 numbers and has a sum of 4,185. The last number of the series is 275. What is the first number?
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The formula for the sum of an arithmetic series is expressed as:
Sn=n/2(a1+an)
where:
n=total terms
a1=the initial term
an=the final term
given
n=18, an=275, Sn=4185
substituting these values into the equation results in:
4185=18/2(a1+275)
after simplification, we obtain:
4185=9(a1+275)
dividing by 9 yields:
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3 0
11 days ago
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These occurrences are unlikely to take place!

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6 0
7 days ago
Read 2 more answers
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babunello [8412]

Answer:

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Step-by-step explanation:

This question doesn't require calculations. What we need to do is analyze each model logically.

Mark's

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Robyn's

Robyn's representation displays 2, suggesting that 200 is 100 times greater than 2, which is not only accurate but also reasonable since 100 * 2 equals 200.

4 0
23 days ago
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