4/9 Review

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Is the data skewed left, right or neither?

1

Is the data skewed left, right or neither?

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Below is the data for the amount of time that Ralph and Sandra spent practicing this week. Use the chart to answer the questions.
What is the mean for Ralph?_______ 
What is the mean for Sandra?_______ 
Who is more consistent (use MAD)?_______ 

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Mr. Nelson had a test and these are some of the scores below. Using the information below, answer each question. Round all answers to the nearest tenth.
1st Block: 65,78,90,82,95,50,82,50

What is the mean?_______ 
What is the mean absolute deviation? Round to the nearest hundredth._______ 

1

Mr. Jones had a test and these are some of the scores below. Using the information below, answer each question. Round all answers to the nearest tenth.
2nd Block: 65,78,90,82,95,100,82

What is the range?_______ 
What is the median?_______ 
What is the IQR?_______ 

1

Required

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Find the mean, median, mode, and range of the data set.  Round your answer to the nearest hundredths place if necessary.

Mean = _______     Median = _______    Mode = _______    Range = _______

Required

1

Find the lower quartile, upper quartile, and interquartile range for each data set.  Round to the nearest tenth if necessary.

Lower Quartile: _______     Upper Quartile: _______      IQR: _______

Required

1

Find the lower quartile, upper quartile, and interquartile range for each data set.  Round to the nearest tenth if necessary.

Lower Quartile: _______     Upper Quartile: _______      IQR: _______

Required

1

Find the lower quartile, upper quartile, and interquartile range for each data set.  Round to the nearest tenth if necessary.

Lower Quartile: _______     Upper Quartile: _______      IQR: _______

4/9 Review

Is the data skewed left, right or neither?

Is the data skewed left, right or neither?

Is the data skewed left, right or neither?

Is the data skewed left, right or neither?

Which data set has a greater variability?

You want to predict how many people in school usually do their homework. You conduct a survey of your class to get a sample. Is this biased or unbiased?

You want to know how many 7th graders at NGMS went to the beach over spring break. You conduct a survey of random 8th grade students to collect your data. Is this biased or unbiased?