the average distance from the mean

Which of the following is the correct description of the distribution for age of washing machines before they break.

The distribution of age of washing machines before they break is roughly symmetric, unimodal. No gaps or outliers. The mean age for when washing machines break is about 19 years and the standard deviation is about 2.5 years.

The shape is roughly symmetric, unimodal. No gaps or outliers. The mean is about 19 and the standard deviation is about 3.

The distribution of age of washing machines before they break is perfectly symmetric, unimodal. No gaps or outliers. The mean age for when washing machines break is about 20 years and the standard deviation is about 30 years.

Which of the following is the correct distribution for battery life of iPads?

The distribution of battery life for iPads is ~symmetric and unimodal. Mean is ~105 hours and standard deviation is ~8 hours. There are two gaps: one btwn 125-130 and another btwn 145-150. There are possible outliers btwn 130-135 and 140-145.

The distribution is ~symmetric and unimodal. Mean is ~105 and standard deviation is ~8. There are two gaps: one btwn 125-130 and another btwn 145-150. There are possible outliers btwn 130-135 and 140-145.

The distribution of battery life for iPads is ~symmetric and unimodal. The median is ~105 hours and IQR is ~8 hours. There are two gaps: one btwn 125-130 and another btwn 145-150. There are possible outliers btwn 130-135 and 140-145.

A teacher created a boxplot for the number of times students ask to use the hall pass in day. Which of the following is the best description of the distribution?

The distribution of # of times students ask to use the hall pass in a day is slightly skewed left. The median number of times students ask is ~8.5 and the IQR is 4.

The distribution is slightly skewed left. The median is ~8.5 and the IQR is 4. It does not appear that there are any outliers.

The distribution of # of times students ask to use the hall pass in a day is ~ symmetric. The mean number of times students ask is ~8.5 and the IQR is 4.

The school wrestling team created a stemplot for the weights of their players (note: the key should say "pounds"). Describe the distribution.

The distribution of weights of wrestlers is ~ symmetric with the exception of the 109 lb player. If you consider the 109 it might be slightly skewed left. Otherwise the median appears to be 152 pounds and the IQR is ~30 lbs. The 109 might be an outlier and there's a gap btwn 110-122 (no one weighs in between those numbers).

The stem and leaf plot is ~ symmetric with the exception of the 109. If you consider the 109 it might be slightly skewed left. Otherwise the median appears to be 152 and the IQR is ~30. The 109 might be an outlier.

The stem and leaf plot for wrestling player weights is bimodal. The median appears to be 152 pounds and the IQR is ~30. The player who weighs 109 might be an outlier and there's a gap where no one weighs 110-119.

The graph is skewed. The mean appears to be 152 pounds and the standard deviation is ~30 lbs. The 109 might be an outlier since he's the only one who weighs less than 123

SOCS Practice

Authored by Devon Senneseth

Mathematics

9th Grade - University

CCSS covered

Used 59+ times

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20 questions

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MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the approximate median for class #1?

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What is the IQR (interquartile range) for class #2?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Describe the shape of the graph.

Skewed right

Skewed left

Uniform

Symmetrical

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes the modes of the graph?

Uniform (not really a mode)

Bimodal (two modes)

Unimodal (one mode)

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Describe the shape of the graph.

Skewed right

Skewed left

Uniform

Symmetrical

Is the graph unimodal, bimodal, or "multimodal" (more than 2)?

Unimodal

Bimodal

Multimodal

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A data set can have more than one mode

True

False

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SOCS Practice

What is the approximate median for class #1?

What is the IQR (interquartile range) for class #2?

Describe the shape of the graph.

Which of the following best describes the modes of the graph?

Describe the shape of the graph.

Is the graph unimodal, bimodal, or "multimodal" (more than 2)?

A data set can have more than one mode

A data set can have more than one median?

Which box and whisker plot shows more "spread out" data?

Which measure of center is sensitive to outliers?

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