The z statistic for a test of H0: p = 0.4 versus Ha: p ≠ 0.4 is z = 2.43. This test is…

Significant at α=.05 but not at α=.01

What is the Alternative Hypothesis?

Statement of values where parameter may fall

In SRS ˆp=158/300=.527 P-value=.18 What is correct interpretation of P-value

50%(support tax)18% prob that x bar would be .527≤ by chance

You are conducting a 1-Sample t-test about a µ using a .05 α level. Which is correct?

Can safely carry out test if sample size is at least 30

What does the test statistics equal?

Statistic - Parameter/Standard deviation of Statistic

The value which you use to reject or accept the Null

What is the alpha level?

Probability cutoff for rejecting or accepting the Null

The result is statistically significant when…

The p-value is less or equal to the significant level

What is Type II error

When you accept H0 but it is false

Which of the following is Not true about the standard error of a statistic?

Increases as sample size increases

Because t conditions are robust, the most important condition their use is

The data can be regarded as an SRS from the population

What is the Null Hypothesis?

A particular parameter value which is assumed to be true

When you reject H0 but it is true

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This is a test consisting of questions regarding the topic of hypothesis tests in the curriculum of Ap statistics. #statistics #hypothesistest #ap

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Questions 25

Answers

1
The z statistic for a test of H₀: p = 0.4 versus H_a: p ≠ 0.4 is z = 2.43. This test is…
Not significant at either α=.05 or α=.01
inconclusive because we don't know the value ˆp
significant at both α=.05 and α=.01
Significant at α=.05 but not at α=.01
2
What is a right tailed hypothesis test?
Ha:p≠p0
Ha:p<p0
Ha:µ≠µ0
Ha:µ>µ0
3
In a test H_o;P=.4 and H_a P≠.4, SRS of 100 gives a test statistics of z=1.28 What is the P-Value
.05
.9
.4
.2
4
What is the Alternative Hypothesis?
Statement of values where parameter may fall
The value at which the Null is rejected
Statement of a particular parameter value
All the above
5
Take a sample size of 16 with µ=64 and σ=10. What is the σ of X bar?
σx=2.5
σx=10
σx=0.625
σx=5
6
In SRS ˆp=158/300=.527 P-value=.18 What is correct interpretation of P-value<br><div><br></div>
50%(support tax)18% prob that x bar would be .527≤ by chance
18% of residents do not support tax increase
18% of the city residents support the tax increase
There is an18% chance that the majority support tax increase
7
Take a sample size of 16 with µ=64 and σ=10. What is the µ of X bar?
µx=2.5
µ<font size="2">x</font>=10
µx=32
µx=64
8
Which 95% confidence interval leads us to reject H₀:p=.3 at H_a:p≠.3 at 5% significance level?
None of these
(0.27,0.31)
(0.24,0.30)
(0.19,0.27)
9
You are conducting a 1-Sample t-test about a µ using a .05 α level. Which is correct?
Can carry out test if no outliers regardless of sample size
Can carry out test only if population stand dev is known
Should not carry out test if sample is not normal
Can safely carry out test if sample size is at least 30
10
What does the test statistics equal?
Statistic - Parameter/Standard deviation of Statistic
√Parameter - Standard deviation of statistic/Parameter
Parameter - statistic/ standard deviation of a parameter
Statistic - Parameter/ (Standard deviation of statistic)^2
11
Null and alternative hypothesis are statements about:
sample statistics
either population parameters or sample statistics
population parameters
sample parameters
12
In SRS of 1000 students. 80% wanted longer time at the school library The standard error is
.013
.8
.64
.16
13
30% of players might use drugs. 200 random players were tested Of 52, 26% test +. Which is true
The number 26% is a parameter
The number 26% is a statistic
The number 30% is a parameter
The number 30% is a statistic
14
What is the p-value?
The value which you use to reject or accept the Null
The value which determines where the Null is rejected
A measure of standard error and assumptions
An SRS of all the data in the test statistic
15
What is the alpha level?
ß + power
1 - power
Probability cutoff for rejecting or accepting the Null
A rejection region for the Null hypothesis
16
The result is statistically significant when…
The p-value is less or equal to the significant level
The p-value is larger than the significant level
The alternative hypothesis is true
The null hypothesis is true
17
In the SRS of 50 free throws, the virtual player made 32. Find the p-value
0.0023
-0.0284
0.00016
0.0062
18
In an SRS of 50 free throws, the vitual player made 32. Calculate the test statistic
-2.83
0.64
-2.27
-0.64
19
Take a sample of 50 students and measure their height. Which is a random variable?
The mean of the sample data
The true mean height of all students from your schoo
The mean of the population data
Mean of sampling dist. of mean heights for samples of 50
20
What is Type II error
All of the above
When you accept H0 but it is false
When the distribution is approximately normal
When you reject H0 but it is true
21
What is a left tailed hypothesis test?
Ha:p>p0
Ha:p<p0
Ha:p≠p0
Ha:µ>µ0
22
Which of the following is Not true about the standard error of a statistic?
Measures avg distance between statistic and pop. parameter
Estimated stand. dev. of sampling distribution for statistic
Can never be negative
Increases as sample size increases
23
Because t conditions are robust, the most important condition their use is
The population standard deviation is known
The population distribution is exactly Normal
There are no outliers in the sample data
The data can be regarded as an SRS from the population
24
What is the Null Hypothesis?
The value used as a probability cutoff
A particular parameter value which is assumed to be true
The value at which the alternative hypothesis is rejected
Statement of alternative values where the parameter may be
25
What is Type I error
All of the above
When you accept H0 but it is false
When you reject H0 but it is true
When the distribution is approximately normal

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