
Hypothesis Testing Concepts and Z Scores

Interactive Video
•
Mathematics, Science, Other
•
9th - 12th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What percentage of scores fall within one standard deviation of the mean in a normal distribution?
99.7%
50%
68%
95%
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the given example, what is the null hypothesis regarding the population mean IQ?
The mean IQ is 140.
The mean IQ is not 100.
The mean IQ is 115.
The mean IQ is 100.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the standard deviation of the population in the given example?
25
20
15
10
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance level (alpha) commonly used in hypothesis testing?
0.01
0.05
0.50
0.10
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a step in conducting a Z test?
Calculating the test statistic
Conducting a survey
Stating the decision rule
Defining the hypotheses
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of setting an alpha level in hypothesis testing?
To calculate the Z score
To control the probability of a Type I error
To determine the sample size
To define the null hypothesis
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a characteristic of a two-tailed test?
It only considers decreases in the mean.
It does not consider changes in the mean.
It only considers increases in the mean.
It considers both increases and decreases in the mean.
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