1.2: Standard Deviation and Graphing Flashcards
What is the second step in standard deviation?
Find the variance
What is the difference between mass and volume?
Mass is the amount of matter in an object, measured in grams or kilograms. Volume is the amount of space an object occupies, measured in liters or cubic meters.
What is the base unit in the metric system?
The base units in the metric system include meters (m) for length, grams (g) for mass, and liters (L) for volume.
What is the relationship between kilo, centi, and milli with the base units?
Kilo- means 1,000 times the base unit, centi- means 1/100th of the base unit, and milli- means 1/1,000th of the base unit.
How do you convert 5 kilometers to meters?
Multiply by 1,000. 5 km × 1,000 = 5,000 meters.
Convert 250 milliliters to liters.
Divide by 1,000. 250 mL ÷ 1,000 = 0.25 liters.
How should you record a measurement with a ruler marked in millimeters?
Record the measurement to the nearest millimeter, including one estimated digit if possible.
How many digits should be recorded if a scale reads 23.45 grams?
Record all digits shown on the scale, so 23.45 grams should be recorded.
How do you calculate the mean/average of a data set?
Add all the values together and divide by the number of values.
What is the median of a data set?
The median is the middle value when the data is ordered from least to greatest. If there is an even number of values, it is the average of the two middle values.
How is standard deviation calculated?
Standard deviation measures the spread of data. Calculate the mean, subtract the mean from each data point, square the result, find the average of these squares, and then take the square root of this average.
Which variable goes on the x-axis of a graph?
The independent variable
Which variable goes on the y-axis of a graph?
The dependent variable
What is a direct relationship between variables?
A direct relationship occurs when both variables increase or decrease together.
What is an indirect (or inverse) relationship between variables?
An indirect relationship occurs when one variable increases while the other decreases.
