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yarga [219]
2 years ago
9

Why is convenience sampling biased? a. It takes too long to obtain b. none of the above c. The sample does not represent the pop

ulation d. is too easy
Mathematics
2 answers:
salantis [7]2 years ago
7 0

Answer:

A)

Step-by-step explanation:

arlik [135]2 years ago
5 0

Answer:

A

Step-by-step explanation:

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30 points to anyone who solves this
shtirl [24]

Answer:

Step-by-step explanation:

cos R = adj/hyp

R = cos⁻¹(9/10) = 25.8419327... ≈ 25.8°

8 0
2 years ago
Given a mean of 150 and a standard deviation of 25:
pishuonlain [190]
We have to define an interval about the mean that contains 75% of the values. This means half of the values will lie above the mean and half of the values lie below the mean.

So, 37.5% of the values will lie above the mean and 37.5% of the values lie below the mean.

In a Z-table, mean is located at the center of the data. So the position of the mean is at 50% of the data. So the position of point 37.5% above the mean will be located at 50 + 37.5 = 87.5% of the overall data

Similarly position of the point 37.5% below the mean will be located at 
50 - 37.5% = 12.5% of the overall data

From the z table, we can find the z value for both these points. 12.5% converted to z score is -1.15 and 87.5% converted to z score is 1.15.

Using these z scores, we can find the values which contain 75% of the values about the mean.

z score of -1.15 means 1.15 standard deviations below the mean. So this value comes out to be:

150 - 1.15(25) = 121.25

z score of 1.15 means 1.15 standard deviations above the mean. So this value comes out to be:

150 + 1.15(25) = 178.75

So, the interval from 121.25 to 178.75 contains the 75% of the data values. 
4 0
3 years ago
What is the image point of
Ganezh [65]

Answer:

<h3>               (8, -5)</h3>

Step-by-step explanation:

Translation right (or left) means change of the x-coordinate.

Translation down (or up) means change of the y-coordinate.

(5, -4)   →    (5+3, -4-1) = (8, -5)

6 0
2 years ago
What is the inequality symbol for 9.6 and square root of 96
Anarel [89]
9.6 is less than the square root of 96. The square root of 96 is roughly 9.8
8 0
3 years ago
Jack used 40 balloons to decorate a room for a party. Of the balloons he used, 15% were red balloons.
ExtremeBDS [4]
15% of 40 = 6 so I’m guessing it would be 6
3 0
3 years ago
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