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Mackalckerjacker--a quiz of statisticsa Flashcards | StudBud
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Mackalckerjacker--a quiz of statisticsa
Mackalckerjacker--a quiz of statisticsa
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The best final project Giacoman has ever seen
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Questions
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Answers
1
When the only two outcomes are success and fail, what type of test is it?
Geometric distribution
Binomial distribution
stratified random sample
Normal distribution
2
In convenience sampling, you choose individuals who are...
have the largest population
easiest to reach
already in a sample
your age
3
What is the
real
last name of our long term sub from this school year?
Napercola
Naps
Napierala
Nips
4
What is the rule for outliers?
1.5x the IQR
Not in the IQR
2x the median
2 standard deviations from the mean
5
You send out 500 surveys but only get 50 mailed back. What are you dealing with?
non-response bias
skewed graph
involuntary sampling
lurking variables
6
In Chapter 14, we learned that degrees of freedom equals...
2n
n/2
n-2
n+2
7
How do you find the
expected count
for a 2 way table in a Chi square test?
Row x Column
Total Columns
(r-1) + (c-1)
(row total x column total)/grand total
8
What is Type I error?
Accept when incorrect
Use the wrong Mean
Reject when correct
Forget to solve the problem
9
Conditional probability--P(A l B) = ?
P(A and B)/P(B)
P(B) - P(A)
P(A or B)/P(A)
P(A) + P(B)
10
On the normal curve, what percent of the data falls within one standard deviation of the mean?
64%
68%
66%
95%
11
A line graph that depicts cumulative frequencies is called
empirical
boxplot
stem and leaf
ogive
12
What phrase must you start all statistical conclusions with?
On average
Always
Usually
Sometimes
13
What is it called when the individuals are divided into separate groups before the experiment?
SRS
2-sample z test
stratified sample
simplified sample
14
The Law of Large Numbers says that the probability gets more accurate when we have:
more variables
less trials
more numbers
more trials
15
What does the symbol "x-bar" represent?
sample proportion
population proportion
population mean
sample mean
16
A variable other than x and y that simultaneously affects both of them is called...
biased variable
lurking variable
discrete random variable
random variable
17
In a 95% confidence interval, the z score is:
1.96
2.576
1.64
2.111
18
The name for a study when
every
individual in the population is used
survey
census
proportion
sample
19
When checking for normality in a z-test, n must be greater than or equal to...
30
5
10
√p(1-p)
20
Standard deviation = variance...
times 2
squared
plus 3
divided by the mean
21
If the graph is skewed right, what happens to the mean?
gets pulled to the left
disappears
gets pulled to the right
stays the same
22
Which famous sports gambling event does Mr. Ingerick claim to win every year due to statistics?
March Madness
Kentucky Derby
All-Star Game Votes
Super Bowl Squares
23
What test do you use for categorical data?
1-sample z test
2-sample t test
chi-squared
t test for means
24
The 68-95-99 rule is also known as what?
Standard deviation graph
The Empirical Rule
The Normal Rule
Giacoman's Law
25
Which symbol represents the coefficient of determination?
r2
r
r/2
2r
