study set for quiz 1; measures of central tendency

Which of the following data sets indicates a strong negative correlation?

{(-2, 4), (-1, 2), (0, 0), (1, -2)

the following frequency table shows the observed high temperatures in Buffalo, New York, in May 2007. temperature frequency 50-59 5 60-69 12 70-79 9 80-89 5 which interval contains the median temperature?

60-69

use the data set shown below to complete the sentence 3, 3, 4, 5, 5, 9 the mean ___________ the median

is greater than

The results from the last quiz that Mr. Tham gave his class are 10, 15, 25, 75, 75, 77, 80, 83, 85, and 90. If he wants to persuade his class to study harder for the next quiz, what statistical measure should he use?

mean

find the mean for the given set of data -4, -3, -1, -1, 0, 1

-1 1/3

1.) correlation 2.) extrapolate 3.) interpolate

1.) a statistical measure to describe how two random variables are related 2.) estimate beyond data points 3.) estimate between data points

which measure of central tendency is least appropriate for describing the given data set? 6, 6, 6, 7, 8, 8, 29

mean

which measure is always the 50th percentile?

median

in which of the following data sets is the mean equal to the mode?

4, 5, 5, 5, 6

Which of the following conclusions can be made based on the scatterplot shown below?

there is a positive correlation between plant growth and the time spent in light

The following bar graph shows the amount of time Latisha participated in an exercise program over a four-week period. If Latisha wants to make the increase over time appear larger, what could she do to the graph?

use a smaller range of the vertical side

A scatter plot with a trend line is shown below. Which equation best represents the given data?

y = 1/2x + 5

1.) dispersion 2.) inter-quartile range 3.) lower quartile 4.) outlier 5.) percentile 6.) range 7.) upper quartile

1.) how data is distributed 2.) the difference between the largest and smallest of the middle 50% of the data set 3.) the median of the lower half of the data set; a value which 25% of the data set falls below 4.) a data value that is far from the others 5.) a value below which a certain percentage of the data set falls; the median is the 50th percentile 6.) the difference between the largest and smallest of the numbers in a set 7.) the median of the upper half of the data set; a value which 75% of the data set falls below

1.) central tendency 2.) data 3.) mean 4.) median 5.) mode

1.) method of summarizing or comparing single-variable sets of data 2.) information; numbers 3.) the average of a set of data; the sum of the elements divided by the number of elements 4.) the middle item in a set of ordered data 5.) the item that appears most often in a set of data

There is a positive correlation between the number of times the Striped Ground Cricket chirps per second and the temperature in degrees Fahrenheit. If a scatter plot is made with the number of chirps on the horizontal axis and the trend line is found to be y = 3x + 25, then what would you predict the number of chirps per second to be when the temperature is 55 degrees Fahrenheit?

10

A data set has an odd number of elements, and there are 3 elements above the upper quartile. How many elements does the data set have?

13

find the mean for the given set of data 18, 15, 22, 18, 25, 19, 23

20

find the mode for the given data set stem leaves 1 6, 8 2 3, 5, 6 3 4, 7, 7 4 0, 1, 6

37

find the median for the given set of data 0.6, 1.1, 2, 0.87, 1.23

0.985

use the stem and leaf plot shown to answer the following question stem leaves 1 6, 8 2 3, 5, 6 3 4, 7, 7 4 0, 1, 6 what is the upper quartile median value?

40

find the range of the given data set -4, -3, -1, -1, 0, 1

5

find the range of the given data set 5/8, 3/4, 1 1/8, 1 1/4

5/8

based on the given frequency table, the lower quartile median is in which interval? temperature frequency 50-59 5 60-69 12 70-79 9 80-89 5

60-69

There is a positive correlation between the number of times the Striped Ground Cricket chirps per second and the temperature in degrees Fahrenheit. If a scatter plot is made with the number of chirps on the horizontal axis and the trend line is found to be y = 3x + 25, then what would you predict the temperature in degrees Fahrenheit to be when there are 20 chirps per second?

85

Skylar's grades on four math tests are 85, 78, 77, and 69. What does Skylar need to score on the next test in order to have a mean score of 80?

91

Explain why the graph shown may be misleading.

A reason why the graph above could be misleading is because of the fact that all of the cars are different sizes. If you were to just look at it once, you wouldn't notice that each car type is a different size.