Empirical (68-95-99.7) Rule Exercise
The following data and histogram represent the weight (in grams) of a random sample of 50 M&M
plain candies. The mean of the sample is 0.87 grams and the standard deviation is .04 grams.
0.87
0.91
0.89
0.83
0.91
0.88
0
1-11-16
1. Write out the molecular formula for each.
c: H W ,
&# Lf 3 K v w C7 H8
\ w w a
\M \
[4 U H V H. \K K H H \ \R
. R v a . \ L
a \ w C12 H29
K M u 1*
9 \k W Pk \x \X Y\ \L H
2. Identify any formal charges: \jalen C6, , Eboi'
3 (0* (Hip) :
(a;
Section 2.4 Describing the Spread (the Variability) of a Quantitative
Variable
Range: - the difference between the maximum and minimum values for the variable
Range = (Maximum value) (Minimum value)
Class B: 97-68+9
Class A: 93-30+69
Variance s2: (essenti
Section 2.4 Describing the Spread (the Variability) of a Quantitative
Variable
Range: - the difference between the maximum and minimum values for the variable
Range = (Maximum value) (Minimum value)
Class B: 97-68+9
Class A: 93-30+69
Variance s2: (essenti
Exam 1
Statistics 110, Fall 2013
KEY
FORM B
Directions: Read each question carefully and select the best response. Be sure to match your response to the
appropriate number on the scantron sheet. Each question is worth 4 points.
Questions 1 5 are based on
Stat201
LabQuiz
ProfessorHendrickson
1. AccordingtotheNationalCenterforHealthStatistics,11%ofboysarediagnosed
withasthmabeforetheageof18.Suppose12boysthatare18yearsoldare
randomlyselected.Letx=thenumberofboysinthesamplewhohavebeen
diagnosedwithasthma
a) W
Chapters 10 12 Handout Solutions
Fall 2012
Stemplots
Babe Ruths homerun totals for his 15 years with the New York Yankees (1920 to 1934) are given
below:
54
59
35
41 46
25
47
60
54
46
49
46
41
34
22
Make a stemplot of these data.
Stem Leaf
2 2 5
3 4 5
4 1
Chapter 22 Notes Examples
Question (IClicker Question 10/30/12)
In hypothesis testing, the statement we want to prove is called the
A. Null hypothesis
B. Alternative hypothesis
C. P-value
D. Significance level
Question (IClicker Question 10/30/12)
We cond