Midterm 1 (2007)

Midterm 1 (2007) - Statistics Test 1 Prof VanderHoff SPRING...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Statistics Test 1 Prof. VanderHoff SPRING 2007 All work must be shown on exam to receive credit. 1. [5] The probability that A occurs is .4. The probability that B occurs is .6. The probability that A and B occur is .3. Are A and B independent? 2. [5] The average time it takes to travel from here to there is 30 minutes. The standard deviation is 5 minutes. About 68% of trips take within what range of times? 3. [8] Calculate the grade point average using the following data: grade credits 4 40 3 30 2 10 1 0 0 10 4. [30] Calculate the statistics below using the following data from a sample: 1 7 3 -2 6 2 1 5 6 1 Mean: Median Mode Range Variance Standard deviation Coefficient of variation
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
5. [7] The grab bag contains 5 snickers, 10 baby ruths and 15 mars bars. What the probability of blindly picking two and both are baby ruths? 6. [5] What is the z score for x=20, when the mean of x=15 and the standard deviation of x = 5? 7. [8] The probability that elevator 1 works is .9; the probability elevator 2 works is .95.
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 2

Midterm 1 (2007) - Statistics Test 1 Prof VanderHoff SPRING...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online