Chapter 10.3 Hypothesis Tests for a Population Mean
To test a hypothesis involving the mean use:
Ttest when
30 .
is not known and the population is normally distributed or n
0 : Claim
x : Mean
s x :
Chapter 10.2 Hypothesis Tests for a Population Proportion
To test a hypothesis about a proportion use:
3 Possible claims about a Population Proportion
1PropZTest given that np(1p) 10
p 0< p 0> p 0
Chapter 7 Normal distribution
To find
cfw_Probability
Area
use normalcdf ( Left bound, Right bound,
, )
Left bound is the cut off value on the left. If it is not cut off on the left use 99999 to rep
Chapter 12.1
A
2
2
GoodnessofFit Test
goodnessoffit test is used to determine whether a frequency distribution follows a specific
distribution.
To perform a
2
goodness offit test, use
2
GOFTest
Chapter 7 Normal distribution ( invNorm )
If you are given
cfw_Probability
Area
use invNorm ( Area of the left side,
, ) to find zscores.
=mean
=standard diviation
If
are not given use 0, 1 as th
Chapter 8.1 Distribution of the Sample Mean
cfw_Probability
Area
To find
use Normalcdf (Left bound, Right bound,
x ,
n
)
Left bound is the cut off value on the left. If it is not cut off on the left
Chapter 10.1 Hypothesis Testing Regarding a Parameter
Null Hypothesis, denoted H 0 , is a statement of no change, no effect, or no difference. It is
Determine the null and alternative hypothesis
assum
Chapter 6.2
Binomial Probability Distributions
Criteria for a binomial probability experiment:
1.
2.
3.
4.
The experiment is performed a set number of times
Each trial is independent
Only 2 outcomes i
Chapter 9.2 Estimating a Population Mean
To construct a confidence interval of the population mean use:
If given data in a table
T Interval
x :
instead of
x is the sample mean
s:
s is the sample stand
Chapter 8.2 Distribution of the Sample Proportion
The sampling distribution of
1) np(1p)
^p is normal if:
10
and
2) n
.05N
The sample proportion is:
^p=
x
n
The mean of the sampling distribution of
Chapter 9.1 Estimating a Population Proportion
To construct a confidence interval of the population proportion use:
1PropZInt
x:
x is the number of individuals from the sample
n:
n is the sample size
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