chapter 1 vocab | chapter 1 review | chapter 2 vocab | chapter 2 review | true or false chap 1&2 |
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What are objects described by a set of data . May be people, animals, or things
individuals
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What is the 5 number summary when graphing is concerned? (quartiles...etc)
1.minimum
2.median 3.maximum 4.quartile 1 5.quartile 3 |
The _______ of a density curve is the equal-areas point , the point that divides the area under the curve in half.
median
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how can you test to see if data is normal? Name 3 different ways
normal probability plot, box plot, bell curve, if mean and median are close.
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Potential outliers are found by using 1.5 (IQR) and then adding and subtracting that to the mean . True or False?
false-you add and subtract IQR from Q1 and Q3
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What is any characteristic of an individual? This can take different values for different individuals
variable
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If the graph of the data is heavy on the left and light on the right it is considered to be skewed______?
right
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The ________ of a density curve is the balance point, at which the curve would balance if made of solid material.
mean
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women's height follow a N(64.5, 2.5). What percent is a female in if she is 62 inches tall?
16th percentile
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The mean, median,mode, IQR, and the quartiles are all resistant. True or False?
true
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What is the ________ of a variable that tells us what values the variable takes and how often it takes these values?
distribution
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The mean salary of all female workers is $35,000 . The mean salary of all male workers is $41,000. What must be true about the mean salary of all workers?
It could be any number between $35,000 and and $41,000.
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A ______ _______ is described by a normal density curve . Any particular ______ _______ is completely specified by two numbers: its mean and its standard. deviation.
Normal Distribution
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If the heights of a population of men follow a normal distribution, and 99.7% have heights between 5'0" and 7'0", what is your estimate of the standard deviation of the heights in this population?
4"
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residual is the predicted value minus the observed value. True or False?
False
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What is the type of variable that places an individual into one of several groups or categories?
categorical variable
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you record the age , marital status , and earned income of a sample of 1463 women. The number and type of variables you have recorded is?
2 quantitative/ 1 categorical
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The mean of a normal distribution is at the center of symmetric ________ ______.
Normal Curve
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A coin is tossed 3 times . What is the probability that it lands on heads exactly 1 time?
.375
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If two events are disjoint, then they can't be independent. True or False?
True
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What is the variable that takes numerical values for which it makes sense to find an average?
quantitative variable
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consumers union measured the gas mileage in miles per gallon of 38 vehicles from the same model year on a test track. The pie chart provides information about the country of manufacturer of the model cars tested by consumers union. Based on the pie chart, we conclude that....?
more than half of the cars in the study were from the United States.
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What is the _____ _________ of a distribution is the value with P percent of the observations less than it.
Pth percentile
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robert is a high school baseball player . He gets a hit 70% of the time. That means his average is .70. What is the probability that he gets his first hit on his 5th at bat?
.0057
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taking the log of the x values of an exponential equation straightens out the line and can then be used for interpolating. True or False?
False-log of the Y-values
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