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Pepsi [2]
1 year ago
7

An equation was used to predict possible weights of puppies at 6 months of age. The actual weights of the puppies are also liste

d.
Actual weight (ounces) 9 15 16 20 20 26
Predicted weight (ounces) 9 12 15 18 21 24


The sum of the residuals is ______.
0
7
9
26
Mathematics
2 answers:
Nady [450]1 year ago
7 0
The sum of the residuals is 26 hope that helps
slega [8]1 year ago
3 0
The answer is 26!!!!!!
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The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 269 day
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a) 279 b)254

Step-by-step explanation:

Mean = 269 days

standard deviation = 8 days

let n be the pregnancy lenght.  

using normal distribution formula

z = (n – mean)/ standard deviation

n = z * standard deviation + mean

Now, z values for the top 12% has to be found using a z table.

The top 12% means 88% of area under the curve. In this case z = 1,176

n = 1,176 * 8 + 269

n = 278.4 = 279

The bottom 3% means 97% of area under the curve. In this case z = -1,882

n = -1,882 * 8 + 269

n = 253.94 = 254

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