Warm-upDay of Ch. 5 Test

Solve the following if P(A) = 0.4 and P(B) = 0.6.

1) Solve for the complement of A. P(Ac) = _____

2) If the events are disjoint solve for

3) If the events are non-mutually exclusive solve for

4) If the events are independent solve for ______)( BAP

______)(

______)(

BAP

BAP

2.0)(if_____)( BAPBAP

Student of the day!Block 4

Student of the day!Block 5

Answers to Part 2 (Ch. 3) of Midterm Review15) A normal curve is a bell-shaped normal distribution curve. 16) 17) % ile in a distribution describes the proportion of numbers

in a set of data, that fall below a particular number.

18) 10th percentile is a # above 10% of the numbers in a distr.The top 10 % is the #, at the 90 percentile. Only 10% of the numbers inthe distribution are higher. 19) 20) In a standard normaldist. table, the z-scores givenalong with proportion of #sthat fall below that z-score.

Part 2 Midterm Review Continued…21) Z-score is a number that represents how many standarddeviations a number is above or below the mean.22) 23) Response variable is the dependent variableor (y-value). The explanatory variable is the independent variable orthe (x-value). 24) Scatterplots are appropriate for displaying quantitative bivariatedata that are related.25) The explanatory variable always appears on the horizontal axis ofa scatterplot.26) Positive correlation means as the explanatory variable increases

so does the response variable. Negative correlation means as the explanatory variable increases the response variable decreases.

27) The correlation describes the strength of the relationship between the two sets of data.

xx

z

Last slide of Midterm Review28) Data must be quantitative to find the correlation,because the formula to find correlation require the inputof two sets of numbers.

29) Correlation coefficient describes the strength of the relationship between bivariate data.

Coefficient of determination describes the proportion ofthe response variable that can be determined by the explanatoryvariable.

Last minute Ch. 5 Questions?

Ch. 5 Test Directions • Read and complete the Ch. 5 test carefully.• When you finish turn in your test in front of the classroom.• Start the free response portion of the Midterm Practice

Test. (#16 – 31) • Work quietly until the last person turns in their test.• Once the last person turns in their test, I will resume

notebook checks.

If you see , the textbook uses a different notation.cAA

Answers to Midterm Practice #17 – 28 and Free Response

17) Dotplot 18) Histogram 19) Bar Graph 20) Box & Whisker 21) Systematic 22) Simple Random 23) Stratified 24) Cluster 25) Block Design 26) Repeated Measures 27) Matched Pairs28) Completely Randomized29) a. The explanatory variable is the GPA, the response

variable is the test score b. There is a moderate positive correlation. There seem to be a couple of outliers in the x. c. Linereg L1, L2 will give you the equation. Make sure the GPAs are under L1 and test scores under L2.

for every one point increase in GPA the test score would go up by 0.067 points. The y-intercept

Remaining Free Response Answers

30) a. b. 0.62% c. < 63.2 (too little)

or > 64.8 (too much)

31)a. 50 males are randomly selected and assigned to the magnet treatment,the remaining are assigned to standard treatment. On a scale of 1 – 10 theyrated the amount of pain they were in before and after treatment. b. For the block design 25 males are randomly selected and assigned to themagnet treatment, the remaining are assigned to standard treatment. The50 females are assigned to the magnet treatment and standard treatmentrandomly as well. Pain is measured before and after treatment.

Preparations for Midterm

• Bring your calculator!• Bring pencils.• Bring a book to read silently if you finish early.• I will have the Ch. 5 tests graded by Tuesday.

If you would like to come by Tuesday and see your test I will be happy to go over it with you.

• If you would like to ask me any questions to prepare for the midterm over the long weekend e-mail me at mariapaz.stern@gmail.com