Unit Test — Unit test Answers
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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.What is the first error she made in computing the variance?
A
Emi failed to find the difference of 89 - 78 correctly.B
Emi divided by N - 1 instead of N.C
Emi evaluated (46 - 78)2 as -(32)2.D
Emi forgot to take the square root of -135.6.23
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A sample of 50 people was randomly chosen, and 60% of them said that they would rather eat breakfast at home than at a restaurant.
A
The new survey’s margin of error will be 50% the size of the original survey’s margin of error.B
The new survey’s margin of error will be between 50% and 100% the size of the original survey’s margin of error.C
The new survey’s margin of error will be 200% the original survey’s margin of error.D
The new survey’s margin of error will be between 100% and 200% the size of the original survey’s margin of error.24
A solid right pyramid has a regular hexagonal base with an area of 7.4 units2. The pyramid has a height of 6 units.
A
11.1 units3B
14.8 units3C
22.2 units3D
44.4 units325
Which shape could be thought of as being created by stacking congruent polygons?
A
coneB
rectangular prismC
square pyramidD
triangular pyramidDid you find these answers helpful?
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