4. A number or a summarized measure that describes the characteristic of a population is called statistic. b. a. parameter. variation. C. d. central tendency,

Find the oefficient of variation for the following data sets. 2. Which data set has more variation? Data set represents the systolic blood pressure for men aged 20-29 and 60-69 20-29 30-30 117 130 122 153 129 141 118 125 131 164 123 139

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I. Background The Food and Drug Administration (FDA) tries to find out whether there is a relation between the number of years people smoked and the percentage of lung damage. FDA asks you for your help to find it out. You interviewed twenty people who have smoked and obtained the following data. II. Technical report: a) Draw a scatter plot. b) Based on the scatter plot, explain whether the number of years and the percentage of lung damage are correlated. If they are correlated, discuss the strength of correlation, and the direction (positive or negative). c) Find the correlation coefficient r. Explain what r implies. d) Choose your own significance level a (1 suggests 0.1, 0.05 or 0.01). State and test the hypothesis. Explain what your findings mean. e) Do your observations in part (b) agree to the results from part (c) and (d)? Explain f) Find the regression line equation. Explain what the line implies. g) Draw the regression line on your scatter plot. h) A man has…

5. is a collection of observations and considered as building blocks of statistical science, A. Data C. Variable B. Parameter D. Statistic

the table below shows the number of books the Jefferson Middle school students readeach month for nine months. Month Sept. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May Number of Books 293 280 266 280 289 279 275 296 271 If the students read only 101 books for the month of June, which measure of central tendency will have the greatest change?A. The mean will have the greatest change.B. The median will have the greatest change.C. All measures will have an equal change.D. The mode will have the greatest change.

Determine whether the data is from a primary or secondary source. Primary       Secondary

40. What is the Dependent Variable of the study? a. Number of Burgers b. Fast Food Group C. Calories d. Popularity

Which set of variables has correlation and causation? A. distance traveled and money spent on gas B. distance traveled and money spent on snacks C. distance traveled and number of drinks consumed D. distance traveled and time spent listening to music

A drug company claims that an allergy medication causes headaches in 5% of those who take it. A medical researcher believes that more than 5% of those who take the drug actually get headaches.