Exam 1 bonus MATH 116

# Exam 1 bonus MATH 116 - SHOW ALL WORK(round to four...

This preview shows pages 1–4. Sign up to view the full content.

Statistics NAME________________________ SHOW ALL WORK MTH 116 (round to four decimals Exam #1 where appropriate) ************BONUS ASSIGNMENT******** 1) Make a histogram of the following data set from a survey. Response | Number Strongly Disagree 155 Disagree 115 No Opinion 25 Agree 116 Strongly Agree 156 1a) Is the histogram symmetric or skewed to the left or right ? ANS_______________ 2)a) Find the mean, standard deviation, median, the two quartiles, and the minimum and maximum of the following data set. Also, make a box-plot of the data set. {1.7, 4, 71.4, 8.9, 23, 6.7, 99, 39, 44, 4, 81} mean=______________ STD=______________ median=____________ Q1=_____________ Q3=_____________ min=________ max=____________ n = _____________ b) Between what two values is the bottom 25%? ANS_______________ 3) Use the 68 - 95 - 99.7% rule or standardize to find the following percentages (probabilities). The Octane level of a certain brand of premium gasoline is normally distributed with a mean of 91 octane and a standard deviation of 3.1 octane a) What percent of the time is the octane less than 91? ANS_________________ ( P(X< 91) ) b) What percent of the time is the octane between 94.1 and 97.2? ANS_________________ ( P(94.1< X< 97.2) ) c) What percent of the time is the octane greater than 87.9? ANS_________________

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

View Full Document
( P(87.9< X) )
4) Let z be the standardized normal variable (z-score or z-stat). a) Find the probability that z is greater than 2.15.

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

### Page1 / 7

Exam 1 bonus MATH 116 - SHOW ALL WORK(round to four...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online