Module 03 Practice Quiz
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Mathematics
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University
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Medium
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Allisha Wise
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8 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A pathologist claims that the proportion of the population who have undiagnosed cancer is 3.2%. Express the null and alternative hypothesis in symbolic form.
Ho: p = 0.032, H1: p > 0.032
Ho: p = 0.032, H1: p < 0.032
Ho: p = 0.032, H1: p ≠ 0.032
Ho: p < 0.032, H1: p > 0.032
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A claim is made that texting while driving now accounts for more than 70% of fatal automobile accidents in the United States. A sample of 500 accidents are investigated and it is found that 74% of them involved texting while driving. Find the value of the test statistic z.
1.9518
-2.0391
2.7603
-1.8223
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A magazine reports that the proportion of households in a certain city that have pets is 62%. An independent researcher claims that the figure is actually higher. A random sample of 230 households found 150 of them owned pets. Using a significance level of 0.05, we find the P-Value = 0.1574. What should we conclude about the original claim?
There is not sufficient evidence to support the claim that the proportion of households that have pets in a certain city is higher than 62%.
There is sufficient evidence to support the claim that the proportion of households that have pets in a certain city is higher than 62%.
There is sufficient evidence to warrant the rejection of the claim that the proportion of households that have pets in a certain city is higher than 62%.
There is sufficient evidence to support the null hypothesis that the proportion of households that have pets in a certain city is higher than 62%.
Tags
CCSS.HSS.IC.B.4
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Which of the following statements is true?
In a hypothesis test, a very low P-value indicates strong support of the alternative hypothesis.
When repeating the same hypothesis test with different random samples of the same size, the conclusions will be the same.
A Type II error is the results of failing to reject a null hypothesis when it is true.
The normal distribution is used to test a claim about a population mean when the population standard deviation is unknown.
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A cookie manufacturer says that there is an average of 15 chocolate chips in their chocolate chip cookies. The American Counsel of Cookie Quality, which is totally a real thing, claims that the true average is less than that. Write the hypotheses in symbolic form.
H0: µ = 15, H1: µ < 15
H0: µ < 15, H1: µ = 15
H0: µ = 15, H1: µ > 15
H0: µ = 15, H1: µ ≠ 15
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
An environmental advocacy group claims that a coal plant is averaging an output of more than 3.5 million tons of CO2 per year. Identify the type II error of the test.
Fail to reject the null hypothesis when the average output of a coal plant is averaging more than 3.5 million tons of CO2 per year
Fail to reject the null hypothesis when the average output of a coal plant is equal to 3.5 million tons of CO2 per year
Reject the null hypothesis when the average output of a coal plant is averaging more than 3.5 million tons of CO2 per year
Reject the null hypothesis when the average output of a coal plant is equal to 3.5 million tons of CO2 per year
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Find the critical value(s) of χ2 based on the following information; H1: σ > 1.33, n = 13, α = 0.025.
19.1328
6.8167
23.3367
4.4038
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