Lessons 1.6 & 1.7 Content Check

Joey’s first 13 quiz grades in a marking period are listed here.

82    93    77    79    90    82    85    85    95    73    79    83    89

Find the median either by hand or use statsmedic.com/applets.

What is the median?

Using the median from #1, select the correct interpretation of the median.

Explain how to find the median if there is an even number of values in a data set.

The weights (in grams) of 12 carrots in a single bag from a local grocery store are listed here.

44    56    48    41    66    55    42    33    51    44    61    65

Either by hand or using statsmedic.com/applets, find the median. Make sure to include units.

The weights (in grams) of 12 carrots in a single bag from a local grocery store are listed here.

44    56    48    41    66    55    42    33    51    44    61    65

Either by hand or using statsmedic.com/applets, find the mean. Make sure to include units.

Interpret the mean that was calculated in #5 for the bags of carrots.

X is used in place of the actual answer.

Look at the dot plot for the weight of carrots in the bag.

Describe the shape of the distribution below, select two correct answers.

Using the description of the dot plot shape from #5, what measure of center is best?

Use the bag of carrot data analysis in Statsmedic.com/applets.

What was the standard deviation?

Round to one place past the decimal point and use units.

Interpret the meaning of the standard deviation.

The histogram displays data from a study of lightning storms in Colorado.45 It shows the distribution of time after midnight (in hours) until the first lightning flash for that day occurred.

Using the data distribution below, decide which measure of center and spread are appropriate to be used when describing the data.

Hint: you will need to select three choices, one for center and one for spread &

explain why.

One of the important factors in determining population growth rates is the birthrate per 1000 individuals in a population.

The dotplot shows the birthrates per 1000 individuals for 54 African nations.

Using the data distribution below, decide which measure of center and spread are appropriate to be used when describing the data.

Hint: you will need to select three choices, one for center and one for spread,

then, why did you make your choice?

To become president of the United States, a candidate does not have to receive a majority of the popular vote. The candidate does have to win a majority of the 538 electoral votes that are cast in the Electoral College.

Here is a stemplot of the number of electoral votes in 2016 for each of the 50 states and the District of Columbia.

How would the mean and median compare?

Heavy Cowboys The roster of the Dallas Cowboys professional football team in a recent season included 7 defensive linemen.

Their weights (in pounds) were 321, 285, 300, 285, 286, 293, and 298.

Find the range of the distribution. Include units.

Heavy Cowboys The roster of the Dallas Cowboys professional football team in a recent season included 7 defensive linemen.

Their weights (in pounds) were 321, 285, 300, 285, 286, 293, and 298. Find the range of the distribution.

What is the standard deviation of the weights? Be sure to include units.

Interpret the standard deviation from #16.

Make sure to use our template:

'... typically vary from the mean of ... by ...'

make sure to include context and units!

The dotplot shows the weights (to the nearest gram) of 12 carrots in a single bag from a local grocery store.

Use statsmedic.com/applets (1 quantitative variable) to find the median weight of the carrots. Be sure to use units.

Data values are: 33, 41, 42, 44, 44, 46, 51, 55, 56, 61, 65, 66

The dotplot shows the weights (to the nearest gram) of 12 carrots in a single bag from a local grocery store.

Use statsmedic.com/applets (1 quantitative variable) to find the Interquartile Range (IQR) of the carrots. Use units.

Interpret the Interquartile Range (IQR) of the carrots from #19.

Be sure to use our template:

'The middle half of the ... has a range of ...'

Make sure you use units and include context.

Based on the shape of the data distribution of carrot weight, which is the more appropriate measure of variability for this distribution for center and spread? Justify your answer.