AP Statistics 2017

Consider again the quiz scores we looked at when we discussed dotplots: Because the data are integral an ...

The following is the histogram of the same data (with bar width 5) produced by the TI-83/84 calculator: Cal ...

than 27.5? solution: From the graph we see that there is 1 value in the first bar, 2 in the second, 6 ...

solution: Both the stemplot and the histogram show symmetric, bell-shaped distributions. The graph is symmetric ...

that we have access to an entire population, or that we are discussing a distribution, we use the statisti ...

The 1-Var Stats procedure, described in the previous Calculator Tip box, will, if you scroll down to the secon ...

Variance and Standard Deviation One measure of spread based on the mean is the variance . By definition, the ...

• It is sensitive to the spread . The greater the spread, the larger will be the standard deviation. ...

We have a pretty good intuitive sense of what an outlier is: it’s a value far removed from the othe ...

There are positions in a dataset that give us valuable information about the dataset. The five-number summ ...

Note that there are two boxplots available. The one that is highlighted is the one that will show outlier ...

example: z 3 = 1.5 tells us that the value 3 is 1.5 standard deviations above the mean. z 3 = –2 ...

This is clearly approximately symmetric and mound shaped. We are going to model this with a curve that ...

Standard Normal Distribution Because we are dealing with a theoretical distribution, we will use μ and σ , ...

example: What proportion of the area under a normal curve lies to the left of z = –1.37? solution: There a ...

example: What proportion of the area under a normal curve lies between z = –1.2 and z = 0.58? solution: (i) ...

(ii) Using the calculator, we have normal-cdf(0.67,100) = 0.2514. We could get the answer from the raw data ...

A man would have to be at least 73.84′′ tall to be in the top 10% of all men. (ii) Using the calculator, ...

Answer: Bimodal, somewhat skewed to the left. For the graph of problem #1, would you expect the mean to ...

the dataset, it is the end of the upper whisker, as shown in the following diagram: A distribution ...