The one-sample z-test and the one-sample t-test both test if a sample mean is representative of...

The one-sample z-test and the one-sample t-test both test if a sample mean is representative of a population. What is the difference between these two tests?

Expert Solution

orchestra answered 2 years ago

Decide and state whether a one-sample z test, a two- sample z test, or a t...

Decide and state whether a one-sample z test, a two- sample z test, or a t test is appropriate. Whichever test you choose, state your null hypothesis, then obtain a P -value and formulate a valid conclusion. 1a.) 20 subjects who do not speak German are asked to participate in a trial for a new type of crash course in the German language. 10 subjects are randomly placed in Group A, to test the new teaching method, while the other...

what are the differences between: 1. one sample z-test 2. one sample t-test 3. independent sample...

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A one-sample z-test for a population mean is to be performed. Let z 0 denote the...

A one-sample z-test for a population mean is to be performed. Let z 0 denote the observed value of the test statistic, z. Assume that a two-tailed test is being performed. True or false: If z0 is negative, the P-value is twice the area under the standard normal curve to the right of z0. 2) A) True B) False

A sample mean, sample standard deviation, and sample size are given. Use the one mean t-test...

A sample mean, sample standard deviation, and sample size are given. Use the one mean t-test to perform the required hypothesis test about the mean M of the population from which the sample was drawn. Use the P- value approach. Also asses the strength of the evidence against the null hypothesis. Mean of the sample= 226,450 ; S= 11,500 ; n= 23 ; mean of the population = 220, 000 ; Ha : M>220,000 ; alpha = 0.01 . 2)....

A sample mean, sample size, and sample standard deviation are provided below. Use the one-mean t-test...

A sample mean, sample size, and sample standard deviation are provided below. Use the one-mean t-test to perform the required hypothesis test at the 1% significance level. x=29, s=6, n=15, H0: μ=27, Ha: μ≠27 The test statistic is t=_______ (Round to two decimal places as needed.) The P-value is ______ (Round to three decimal places as needed.) ▼ ______ the null hypothesis. The data _____ sufficient evidence to conclude that the mean is ______ ▼

This semester we have discussed the following statistical analyses. Z-test One-Sample t-test

This semester we have discussed the following statistical analyses. Z-test One-Sample t-test Independent Groups t-test Repeated Measures t-test One-Way ANOVA Regression Correlation 1. Research shows that people who do well on the SAT tend to do well in college (they have a higher GPA). Likewise, students who do not do well on the SAT struggle in college (they have a lower GPA). This information is used by college admissions officials to determine if a student should...

Compute both a paired t-test and two-sample t-test (for practice) but report the t-value for the...

Compute both a paired t-test and two-sample t-test (for practice) but report the t-value for the correct test. XI (Girl Guides) X2 (Boy Scouts) 9 6 9 7 5 5 10 8 6 5 8 6 6 7 7 5 9 4 6 7

Assume a test of the null hypothesis that requires a t-test (rather than a z-test). Sample...

Assume a test of the null hypothesis that requires a t-test (rather than a z-test). Sample size is 25 and alpha is .05. Which of the following would be appropriate critical t values for a 2-tailed test and a one-tailed test, respectively, of the null hypothesis? Question 21 options: a) +2.064, + 1.711 b) +2.064, +1.711 c) +2.064, +1.711 d) +2.064, + or - 1.711

The value obtained for the test statistic, z, in a one-mean z-test is given. Also given...

The value obtained for the test statistic, z, in a one-mean z-test is given. Also given is whether the test is two tailed, left tailed, or right tailed. Determine the P-value. A left-tailed test: z = -0.58 Group of answer choices 0.7190 0.4380 0.5620 0.2810

Part II. Indicate whether you would perform a z test, two-sample t test, paired t test,...

Part II. Indicate whether you would perform a z test, two-sample t test, paired t test, or ANOVA for the following research question? All the outcomes are continuous variables. A group of adolescent boys was offered interpersonal skills counseling and then tested in September and May to see if there was any impact on family harmony. 3 groups of participants were exposed to different levels of treatment for ankle sprain. Which treatment was more effective? 1 group of men was...

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