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Exam 2: Organization and Description of Data

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Question 1

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For the data concerning the number of chemistry class discussion sections skipped by 5 students last semester. 1 3 4 9 3 Calculate the (a) sample mean (b) deviations x- x and check to see that they add up to 0. (c) sample variance. Give the units of variance. (d) sample standard deviation.

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(a) 4 and ...

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Question 2

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Both, categorical and numerical data can be described graphically using tables and ______.

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Five students reported the number of canned/bottled beverages they consumed last week 3 7 3 11 1 Calculate the (a) sample mean (b) deviations x - x and check to see that they add up to 0. (c) sample variance. Give the units of variance. (d) sample standard deviation.

Find the variance of the following data set.

The top number of goals scored by a national team in 18 FIFA's World Cups is shown below. Select the dot diagram that matches with the data.

During a recent regular season, the Orlando magics basketball team won 59 games. The difference of points in 24 of these games is shown below. Find the control chart that corresponds to these data. I II

If M is the mean of x₁, x₂, and x₃, then the mean of x₁ + 3, x₂ + 3, and x₃ + 3 is M + 3.

A football fan recorded the total number of points scored by 5 teams during week 1. a) Calculate the sample variance. b) Calculate the sample standard deviation.

In describing a data set of measurements, the computation of numerical measures is irrelevant.

Find the histogram that better describes the data.

For the data set 6 10 1 a) Calculate the deviations (X-X̄) . Round your answers to two decimal places. b) Calculate the sample variance and the standard deviation.

The following data represents the Tampa Buccaneers number of touchdowns per season, in 20 seasons. Make a stem-and-leaf display.

The second quartile of a data set always corresponds to the median.

In a recent basketball season, one-star player scored 475 field goals, 4 3-point field goals, and 292 free-throw goals. Find the pie chart that better describes the data.

Refer to the data. a) Calculate $\bar{X}$ and s. b) Find the proportion of the observations that are in the intervals $\bar{X}±s$ , $\bar{X}±2s$ , and $\bar{X}±3s$ .

The table below shows the attendance to the Super Bowl for 14 years a) Find the 10th percentile. b) Find the interquartile range.

Find the standard deviation of the following data set.

Calculate the mean and median of the following data set. Round your answer to the nearest tenth.

Consider the software summary of the data on the length of a wolf's Canine(mm). n = 19 sd(x) = 1.969 (a) sample range (b) sample interquartile range. (c) $( \bar{x} - 2s , \bar{x} - 2s )$

A report on the points gained by football teams playing at home in week 2 of the season are summarized below. a) Calculate the sample variance. b) Calculate the interquartile range.