**Question: A two-tailed hypothesis test for the population mean****Answer Options:**- [ ] has two critical values.- [ ] may have one or two critical values.- [ ] has only one critical value.- [ ] may have more than two critical values.**Explanation:**A two-tailed hypothesis test is used when we are interested in deviations in both directions from a specified population mean. In such tests, the critical values are the points that form the boundaries of the rejection regions on both tails of the distribution. Typically, a two-tailed test involves comparing a test statistic to two critical values, one on each tail of the distribution.**Correct Answer:**- [ ] has two critical values.In this multiple-choice question, the correct answer is that a two-tailed hypothesis test for the population mean has two critical values. This is because the test checks for the possibility of the population mean being both significantly higher and significantly lower than the hypothesized mean. Therefore, two points are set as thresholds (critical values) to determine if the test statistic falls in the rejection regions on either side.

Given that Two tailed test hypothesis. H1 : μ≠μ0 (two tailed)

Answered: A two-tailed hypothesis test for the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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a sample of employees is selected and it is found that 45% own a computer which is it a statistic or a parameter
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A z-test is to be performed for a population mean. Express the decision criterion for the hypothesis test in terms of x. That is, determine for what values of x the null hypothesis would be rejected. ala After training intensively for six months, John hopes that his mean time to run 100 meters has decreased from last year's mean time of 11.8 seconds. He performs a hypothesis test to determine whether his mean time has decreased. Preliminary data analyses indicate that it is reasonable to apply a z-test. The hypotheses are Ho:u= 11.8 seconds H:u11.64 O Reject H, if x 11.61 Submit Assignment 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use | Privacy II
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In a study of all babies born at hospitals in one state, it was found that 48.1% of the babies were girls . Identify whether this value is a statistic or a parameter . A. The value is a statistic because it describes some characteristic of a population . B- The value is a parameter because it describes some characteristic of a sample . C- The value is a parameter because it describes some characteristic of a population
4. If no values are repeated, then a data set doesn't have a mode. True False
You suspect that drivers for Uber/Lyft have newer cars than a driver who doesn’t drive for Uber/Lyft. Listed below are the ages of cars that you randomly sampled from the streets of Portland. If one were to conduct a hypothesis test for the difference in mean car age and mean Uber/Lyft car age, the conditions for the test would need to be checked. What conditions should you check? Check the conditions and explain how the conditions are met or not. What is the appropriate test to conduct, an independent samples t test or paired t test? Explain. Uber/Lyft car age 4 0 8 11 14 3 4 4 3 5 8 3 3 7 4 6 6 1 8 2 15 11 4 Non-Uber/Lyft Car age 8 8 0 3 8 4 3 3 6 11 7 7 6 9 5 10 8 4 3 4
2. When we carry out a 1-sample hypothesis test for the mean, one of the ways that we can check for normality is to look at the normal plot. How do we know if our normality assumption is satisfied by looking at the normal plot? Be as specific as possible.
Describe a study in which you can use both nonparametric and parametric statistics. A researcher has participants expecting to receive either painful or mild electrical shocks during a study wait in a quarter-full waiting room with other participants. He then measures whether they choose to sit next to other participants or if they sit far away on their own. What is the best test to run for this study and why?
If a researcher rejects the null hypothesis when conducting a hypothesis test, it means that the sample data failed to provide sufficient evidence to conclude that the treatment had an effect. true or false
If the null hypothesis is true, then what does the distribution of sample means?
In the past, the mean running time for a certain type of flashlight battery has been 8.1 hours. The manufacturer has introduced a change in the production method and wants to perform a hypothesis test to determine whether the mean running time has changed as a result. This test would be a (a) left-tailed test (b) two-tailed test (c) right-tailed test The test is (Enter a, b, or c)

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A two-tailed hypothesis test for the population mean has two critical values. may have one or two critical values. has only one critical value. may have more than two critical values.