if the direction of the difference between teo groupd is not specified will you want to...
Homework Answers
If the direction of the difference between two groups is not specified, then we should got for two-tailed test (which include right as well as left alternatives]
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the direction of the difference between teo groupd is not specified
will you want to...
A researcher wants to know if there is a difference between 12th graders and 9th graders...
A researcher wants to know if there is a difference between 12th graders and 9th graders on the ABC memory test. What is the direction for this research hypothesis? Choices: one-tailed two-tailed no direction No answer text provided.
In a test of reaction time, we want to know if there is a difference in...
In a test of reaction time, we want to know if there is a difference in the speed at which people click on small vs. large buttons. 10 participants are presented with large button sizes and reaction times are measured (in milliseconds). Then 10 different participants, matched in age, are presented with small button sizes, then reaction times are measured. Use an alpha of .05. See below table for summary data: Mean Standard Deviation Large Buttons 681.60 35.22 Small Buttons...
You want to know if there is a statistically significant difference between father’s age and miscarriage....
You want to know if there is a statistically significant difference between father’s age and miscarriage. You collect data at the Totally Made Up Hospital and find the following: Miscarriage N Mean Paternal Age Standard Deviation No 162 33.4 2.8 Yes 48 41.1 3.1 a. What is your null hypothesis? b. What is your research hypothesis? c. What test would you run to test your hypothesis? d. Compute the test at the 5% level of significance. e. State whether you...
please help.. respond to the following in at least 175 words. The difference between a one...
please help.. respond to the following in at least 175 words. The difference between a one tail and a two tailed test. The importance of stating the null and alternative hypotheses before conducting the test. The importance of a type one error (p) in conducting the test The relationship between the p value and our decision to accept or reject the null hypothesis
In hypothesis testing , alpha defines: Proportion of probable outcomes. Importance of statistical findings. probability value...
In hypothesis testing , alpha defines: Proportion of probable outcomes. Importance of statistical findings. probability value that separates "common" and "rare" outcomes. probability of Type II error was made. According to the textbook, if researchers decide to use a one-tailed Z-test rather than a two-tailed Z-test, they would have to justify the use of aone-tailed test on the basis of the amount of sampling error. the amount of degrees of freedom. the difference between the hypothesized and observed means after...
A reading specialist suspects that there is a difference in the average reading speed between senior...
A reading specialist suspects that there is a difference in the average reading speed between senior boys and senior girls at her high school. To test her claim, random samples of 25 senior boys and 25 senior girls were selected. The reading speed of each student was measured. The reading specialist uses the data obtained to test the hypotheses H0: μboys - μgirls = 0 versus Ha: μboys - μgirls ≠ 0, where μboys and μgirls are the true mean...
No interpretation is needed since.67 is greater than .05. Question 18 5 pts You are interested...
No interpretation is needed since.67 is greater than .05. Question 18 5 pts You are interested in on-the-job anxiety among police officers and want to empirically test if the shift they work influences their anxiety. You hypothesize that there is a difference in anxiety on the job between police officers who work FIRST shift and police officers who work THIRD shift. You collect data from a large random sample of officers from both shifts. You find that the average on-the-job...
Explain the difference between an auction with reserve and an auction without reserve. if not specified,...
Explain the difference between an auction with reserve and an auction without reserve. if not specified, which is the default form of auction? How can an offeror revoke an offer?
You want to determine if salary is affected by gender and whether the employee has a...
You want to determine if salary is affected by gender and whether the employee has a graduate degree or not (taken together). The correct statistical technique/test would be: Chi-square Correlation One-tailed ttest Two-tailed ttest Simple linear regression Multiple regression Logistic regression Dummy variable regression ANOVA One-way ANOVA
A researcher reports that the mean difference between two groups is 20.12 and the estimated standard...
A researcher reports that the mean difference between two groups is 20.12 and the estimated standard error for the difference is 2.83. Hence, the conclusion must be to reject the null hypothesis for a two-tailed test at a .05 level of significance. Question 4 options: True or false False
No interpretation is needed since.67 is greater than .05. Question 18 5 pts You are interested in on-the-job anxiety among police officers and want to empirically test if the shift they work influences their anxiety. You hypothesize that there is a difference in anxiety on the job between police officers who work FIRST shift and police officers who work THIRD shift. You collect data from a large random sample of officers from both shifts. You find that the average on-the-job...
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