Histograms and Data Distribution

When the distribution of data is pushed to the left like this it is said to be;

• negatively skewed

• positively skewed

Given the data set: 1, 2, 3, 6, 9, 11, 45, 102, calculate the percentile for the data value 11 in this set.

• 70^th percentile

• 62.5^th percentile

• 72.5^th percentile

• 75^th percentile

The 50th percentile is also known as the _______________.

• median

• mean

• mode

• best percentile

In a factory, the weight of the concrete poured into a mold by a machine follows a normal distribution with a mean of 1150 pounds and a standard deviation of 22 pounds. What weight falls at the 50th percentile?

• 1106 pounds

• 1128 pounds

• 1150 pounds

• 1172 pounds

What is a reason you might want to use a histogram instead of a dot plot to display data? (Choose the best response.)

• The histogram allows you to show each individual data value collected rather than displaying data in "bins" like a dot plot.

• The histogram is better when you don't have repeated data values and when the data is spread out with gaps between values.

• The dot plot can be used to display quantitative data, while the histogram is used for quantitative and categorical data.

• Histograms and bar charts are basically the same and so you can convert a histogram into a bar chart.

What percent of the data is between 25 and 30 on the number line?

• 25%

• `50%

• 75%

• 100%

Describe the shape of this stemplot.

• Perfectly Symmetric

• Strongly Skewed Left

• Strongly Skewed Right

• Roughly Symmetric

What type of Data Display is this?

• Line Plot

• Pie Chart

• Histogram

• Stem & Leaf Plot

Histograms are good data displays because...

• They allow you to group your data values into a range of numbers

• They allow you to make a prediction of a future measurement

(a)   are very similar to bar graphs.