Significance Test Practice Problems & Questions

Your math test scores are 68, 78, 90, and 91.
What is the lowest score you can earn on the next test and still achieve an average of at least 85?
Getting an Answer Solve your inequality to find the lowest score you can earn on the next test and still achieve an average of at least 85.
What score do you need to earn?

Emeli Hagan 2021-11-06

Which of the following applies to the Significance Test for the Proportion's underlying assumptions?
1) Data is Categorical.
2) Data is from a convenience sample.
3) $n p_{0}$ and $(1 - p_{0})$ are both greater than 15
4) Data is Quantitative
5) Data is from a Normal Distribution
6) Data is from a random sample
7) $\hat{n p}$ and $n (1 - \hat{p})$ are both greater than 15

alesterp 2021-11-06

Using the Standard Normal Table from the online lectures this week, what is the area under the standard normal curve:
a) To the left of a z-score of 1.25
b) To the right of a z-score of 1.25
c) Between the z-scores -0.25 and 0.55

Ramsey 2021-11-05

Determine whether the statement is true or false. If it is false, rewrite it as a true statement: "when each data class has the same frequency, the distribution is symmetric."

Cheyanne Leigh 2021-06-30

Suppose that you want to perform a hypothesis test based on independent random samples to compare the means of two populations. You know that the two distributions of the variable under consideration have the same shape and may be normal. You take the two samples and find that the data for one of the samples contain outliers. Which procedure would you use? Explain your answer.

Sinead Mcgee 2021-06-28

Suppose that you want to perform a hypothesis test to compare four population means, using independent samples. In each case, decide whether you would use the one-way ANOVA test, the Kruskal-Wallis test, or neither of these tests. Preliminary data analyses of the samples suggest that the four distributions of the variable a. are not normal but have the same shape. b. are normal and have the same shape.

SchachtN 2021-06-26

In the treatment of critically ill patients, teamwork among health care professionals is essential. What is the level of collaboration between nurses and resident doctors working in the intensive care unit (ICU)? This was the question of interest in an article published in the Journal of Advanced Nursing (Vol. 67, 2011). Independent samples of 31 nurses and 46 resident doctors, all working in the ICU, completed the Baggs Collaboration and Satisfaction about Care Decisions survey. Responses to all questions were measured on a 7-point scale, where $1 =$ never and $7 =$ always. The data for the following two questions (simulated from information provided in the article) are listed above. a. Conduct a nonparametric test (at $α = 05 α = 05$ ) to compare the response distributions for nurses and doctors on Question 4. Practically interpret the result. b. Conduct a nonparametric test (at $α = 05 α = 05$ ) to compare the response distributions for nurses and doctors on Question 5. Practically interpret the result. Question 4: Physicians and nurses cooperate in making decisions.
Nurses:1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 4 5 5 5 5 5 5 5 7 7 Doctors:1 1 1 1 1 1 1 2 2 2 3 3 3 3 3 3 3 3 3 3 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 7 7 7 7 7
Question 5: In making decisions, both nursing and medical concerns about patients' needs are considered.
Nurses:1 1 2 2 2 2 3 3 3 3 33 3 3 3 4 4 4 4 4 4 5 5 5 5 5 5 5 5 6 6 7 Doctors:2 2 2 2 2 3 3 3 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 7 7 7 7 7 7 7 7

tinfoQ 2021-06-18

Although tea is the world’s most widely consumed beverage after water, little is known about its nutritional value. Folacin is the only B vitamin present in any significant amount in tea, and recent advances in assay methods have made accurate determination of folacin content feasible. Consider the accompanying data on folacin content for randomly selected specimens of the four leading brands of green tea. Brand 1234amp; Observations amp;7.9amp;5.7amp;6.8amp;6.4amp;6.2amp;7.5amp;7.5amp;7.1amp;6.6amp;9.8amp;5.0amp;7.9amp;8.6amp;6.1amp;7.4amp;4.5amp;8.9amp;8.4amp;5.3amp;5.0amp;10.1amp;amp;6.1amp;4.0amp;9.6amp;amp;amp;
(Data is based on “Folacin Content of Tea,” J. Amer. Dietetic Assoc., 1983: 627–632.) Does this data suggest that true average folacin content is the same for all brands? a. Carry out a test using $α := .05$ via the P-value method. b. Assess the plausibility of any assumptions required for your analysis in part (a). c. Perform a multiple comparisons analysis to identify significant differences among brands.

jernplate8 2021-06-13

For a test of $H_{0} : p = 0.5,$ the z test statistic equals 1.74. Find the p-value for $H_{a} : p > 0.5$ .
a) 0.0446
b) 0.0409
c) 0.892
d) 0.9591
e) 0.0818
f) 0.9554

Brennan Flores 2021-05-28

Find the margin of error for the given values of c,s, and n. c=0.95, s=2.2, n=64

Braxton Pugh 2021-05-25

The means of the number of revolutions per minute of two competing engines are to be compared. Thirty engines are randomly assigned to be tested. Both populations have normal distributions. Table 10.9 shows the result. Do the data indicate that Engine 2 has higher RPM than Engine 1? Test at a 5% level of significance. EngineSample Mean Number of RPMPopulation Standard Deviation 11,50050 21,60060 Table 10.9

Zoe Oneal 2021-03-06

To explain:Whether the samples are independent or dependent.

Trent Carpenter 2021-03-05

If a report states that certain data were used to reject a given hypothesis, would it be a good idea to know what type of test (one-tailed or two-tailed) was used? Explain.

glamrockqueen7 2021-03-05

To state:The null and alternative hypothesis.

sjeikdom0 2021-02-24

To state:The null and alternative hypotheses.

Aneeka Hunt 2021-02-22

Find the slope of the regression.
Find the t-statistic for testing the slope.
Find the p-value for testing the slope.

Marvin Mccormick 2021-02-09

To explain:The purpose of the study.

Wierzycaz 2021-02-02

Check Requirements What sampling distribution will you use? What assumptions are you making? What is the value of the sample test statistic?

Alyce Wilkinson 2021-01-31

To describe:How would you test the representative's claim and also identify the type of the test.

Cabiolab 2021-01-27

Critical Thinking: One-Tailed versus Two-Tailed Tests For the same data and null hypothesis, is the P-value of a one-tailed test (right or left) larger or smaller than that of a two-tailed test? Explain.

Almost all significance test practice problems that you will encounter below help to find solutions to your questions as the answers deal with the same equations that have been used. Start with any significance test example and you will understand that you only have to change variables to determine each value. It's exactly what makes significance test equation so popular as it provides help with more advanced probability concepts. As you look through significance test questions, look for similar patterns as these are where you must start regardless of whether you deal with a complex engineering project or statistical analysis.

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