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Multiple choice question about the mean of a distribution.

The number of cartoons watched by first graders on Saturday mornings is shown below: x, P(x) 0, 0.2 1, 0.2 2, 0.3 3, 0.15 4, 0.1 5, 0.05 The mean of this distribution is a) 1.9 b) 2.6 c) 2.4 d) 3.1 e) None of the above

Subject:

Statistics

Topic:

All Topics

Posting ID:

6054

OTA ID:

103570

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True or false question about the area under a normal distribution curve.

True or false: The area under the normal distribution curve between z = 1.52 and z = 2.35 would be 0.0549.

Subject:

Statistics

Topic:

All Topics

Posting ID:

6059

OTA ID:

101298

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Multiple Choice question about finding the mean from a normal distribution given standard deviation.

In a given normal distribution, the standard deviation is 14.4 and 8.27% of the distribution lies to the left of 60. What is the mean? a) 80 b) 40 c) 63 d) 72 e) None of the above

Subject:

Statistics

Topic:

All Topics

Posting ID:

6060

OTA ID:

101298

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Multiple choice question about the area under a normal distribution curve.

What is the area under the normal distribution curve to the left of z = 0.87 ? a) 0.3078 b) 0.8078 c) 0.1922 d) 0.6922 e) None of the Above

Subject:

Statistics

Topic:

All Topics

Posting ID:

6062

OTA ID:

103139

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Corresponding percentile of a z value

True or false. The z-value which corresponds to the 18th percentile is z = -0.92.

Subject:

Statistics

Topic:

All Topics

Posting ID:

6063

OTA ID:

101298

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