0
5
15
25
30
33
40
44
52
60
81
104
mean
median
mode
40.75
36.5
#VALUE!
I am suspecting the mode is not calculating because none of the numbers are listed
none of the numbers are listed more than once.
0
0
2
3
3
5
5
5
6
7
8
9
10
12
15
mean
6
median
5
mode
3.1 exercises-Data collection, sampling, and Probability
Chapter 4
4.1
Observational data is collecting random samples and finding data from random sources comparing data
and statically information would be gathered. Experimental data is actual data from
a. Parameter is the population is the mean number of interest, whch in this question the parameter is the number of comm
b. statistic is decriptive measure of a sample, which is 250 students who commute to school
c. population is the group of all items of
a, 0,1,2,3.thru 100
b. yes because the number of possible values
c. yes, 101 values because the variable x can assume total of 101 values
d. variable is decrete because it can take a countable number of values
a. .04+.28+.42+.21=0.95
p=0.95
b. .02+.02=.04
Chapter 7: Sampling Distributions
Chapter 7: Sampling Distributions
1. A phone-in poll conducted by a newspaper reported that 73% of those who called in
liked business tycoon Donald Trump. The number 73% is a(n)
A) unbiased estimate. B) sample. C) paramet
Chapter 8: Estimating with Confidence
Chapter 8: Estimating with Confidence
1. A 95% confidence interval for the mean of a population is computed from a random
sample and found to be 9 3. We may conclude that
A) there is a 95% probability that is between
Chapter 4: Producing Data
Chapter 4: Producing Data
1. In order to determine if smoking causes cancer, researchers surveyed a large sample of
adults. For each adult they recorded whether the person had smoked regularly at any
period in his or her life and
QUIZ 1
1. A financial statement audit is designed to
a. Detect error or fraud in the financial statements, regardless of
whether or not the error or fraud is material.
b. Obtain reasonable assurance about whether the financial
statements are free of mater
Case Study
2-34
a. The incentive to commit fraud stemmed from the company not wanting to lose anyones interest
in stock options. The opportunity is when their stock started too dropped so they need to keep
the investors happy and that is by changing the n
Week 3 Chapter 5 Formulas
Dependent Events
Conditional Probability
A/B
P )=
P( AB)
P( B)
B/A
P )=
P( AB)
P (A)
Multiplication rule
P( A and B)= P(B) P( A / B )
P( A and B)= P(A) P( B / A )
Addition Rule
P( A or B) = P(A) + P(B) P(A and B)
Independent Even
Chapter 1 (p. 9) 1.21.5, 1.7
Chapter 2 (p. 30) 2.1, 2.3, 2.5, 2.6, 2.12, 2.15
1.2
Descriptive statistics deals with methods of organizing, summarizing, and presenting data in a convenient and informative way.
Inferential statistics is a body of methods us
CHAPTER 1: WHAT IS STATISTICS?
TRUE/FALSE
1. The significance level measures the proportion of the time an inference about a population will be
correct in the long run.
ANS: F
NAT: Analytic; Statistical Inference
2. A summary measure that is computed from
10.1
Decision
Approve the Drug Type II By approving the drug you have a better chance at helping people
who may need a change in medication to cure their diagnosis.
Disapprove the Drug Type I By disapproving the drug you could possibly stop its helpful
fa
8.5
When population is normal with mean 40 and variance 12^2=144 then sample distribution of x bar is
normal distribution with mean 40 and variance 12^2 / Sqrt(n) = 144 / sqrt(100) = 144/10 = 14.4
8.6
Yes, because the variance changes as well as the sampl
Chapter 1
1 At Cedar Rapids Community College, administrators want to determine the average commuting distance for their students who commute to school. They ran
a.
Describe/find the parameter.
The parameter is the average commuting distance for the stude
6.2
a. 1:100 2:75 3:50 4:20 5:60
b. Yes. Since 100 is an even number it can be counted in different ways.
c. Yes.100 is an even number and can be cut in half to find its value.
d. It is contnuious The reason its continuous is because it can go past 100.
6
PSY1060 5.3 Written Assignment
Instructions
Answer two of the three questions listed below. You should write your answers in this
document, and answers should be between one half and one full page for each question.
1. Identify one personal behavior that