Briefly describe a one-tailed vs two-tailed t-test in the context of hypothesis testing?

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orchestra answered 11 months ago

4. Why would a researcher test a one-tailed vs. a two-tailed hypothesis? 5. Why would it...

4. Why would a researcher test a one-tailed vs. a two-tailed hypothesis? 5. Why would it be impossible for a researcher to test the following hypothesis using a t-test? H1: Female homicide offenders are more likely to be sentenced to maximum security prison than male homicide offenders. 6. If the null hypothesis in a t-test for two samples is not rejected, what conclusion can be drawn about the two means of the categorical variable? 7. Two groups of subjects participated...

1. Why would a researcher need to use a two-tailed test vs. a one-tailed test? 2.A...

1. Why would a researcher need to use a two-tailed test vs. a one-tailed test? 2.A scholar tests the following hypothesis: Females have a greater number of delinquent peers than males. In her test, she calculates a t value is -2.349. Why would it be unnecessary to compare this test statistic to a critical t value?

Consider using a one-tailed as well as a two-tailed test of a null hypothesis regard- ing...

Consider using a one-tailed as well as a two-tailed test of a null hypothesis regard- ing an estimated regression coefficient. For the same significance level, which test is more stringent? In other words, for which test does rejection of the null hypothesis automatically imply rejection in the other test as well, but not vice versa? Explain.

Describe the difference between a one tailed and a two tailed test. What is the difference...

Describe the difference between a one tailed and a two tailed test. What is the difference between a z test and a t test, and how do you determine which one to use? Also, discuss when a two sample test would be used, and provide an example.

QUESTION 4 In which case would testing the null hypothesis not involve a one-tailed statistical test?...

QUESTION 4 In which case would testing the null hypothesis not involve a one-tailed statistical test? PLEASE PROVIDE BRIEF EXPLANATION! H1: Incentive pay for teachers does affect student achievement H1: Higher sales tax rates does not reduce state tax revenues H1: Extending the duration of unemployment benefits does not increase the length of joblessness H1: Smoking does not reduce life expectancy

What is the p-value of a two-tailed one-mean hypothesis test, with a test statistic of z0=0.27?...

What is the p-value of a two-tailed one-mean hypothesis test, with a test statistic of z0=0.27? (Do not round your answer; compute your answer using a value from the table below.) z0.10.20.30.40.50.000.5400.5790.6180.6550.6910.010.5440.5830.6220.6590.6950.020.5480.5870.6260.6630.6980.030.5520.5910.6290.6660.7020.040.5560.5950.6330.6700.7050.050.5600.5990.6370.6740.7090.060.5640.6030.6410.6770.7120.070.5670.6060.6440.6810.7160.080.5710.6100.6480.6840.7190.090.5750.6140.6520.6880.722

In each of the following situations, is the alternative hypothesis one-tailed or two-tailed? What are the...

In each of the following situations, is the alternative hypothesis one-tailed or two-tailed? What are the hypotheses? a) A soda company recently reformulated their diet cola in an attempt to appeal to teenagers. They run a taste test to see if the new formula appeals to more teenagers than the standard formula. b) A budget override in a small town requires a two-thirds majority to pass. A local newspaper conducts a poll to see if there's evidence it will pass....

For a two-tailed hypothesis test at the significance level alpha, the null hypothesis H0: μ =...

For a two-tailed hypothesis test at the significance level alpha, the null hypothesis H0: μ = μ0 will be rejected in favor of the alternative hypothesis Ha: μ≠ μ0 if and only if μ0 lies outside the (1 - α) level confidence interval for μ. Illustrate the preceding relationship by obtaining the appropriate one-mean z-interval for the data below. Suppose the mean height of women age 20 years or older in a certain country is 62.8 inches. One hundred randomly...

For a two tailed hypothesis test at the significance level a, the null hypothesis H0: M=M0...

For a two tailed hypothesis test at the significance level a, the null hypothesis H0: M=M0 will be rejected in favor of the alternative hypothesis Ha: M does not = M0 lies outside the (1-a) level confidence interval for M. Illustrate the preceding relationship by obtaining the appropriate one mean t interval for the data below. According to a survey, the average person watched 4.53 hours of television per day in 2005. A random sample of 20 people gave the...

Do hypothesis testing (t test) Test to see if there is a difference between grade of...

Do hypothesis testing (t test) Test to see if there is a difference between grade of male and female students - insert the SPSS output in the space below. a- What would be the alternate hypothesis for the study? b- What would be the null hypothesis? c- What Level of Significance do you choose? d- What is the computed t critical value for the study? e- What is the P-value of...

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