Let's say you conducted a t test to compare two samples. You calculated a t value of -2.16. The critical t value was 2.24. Is the result statistically significant? Explain your answer.
Solution:
Since it is observed that |t| = 2.16 < tc = 2.24 , it is then concluded that the null hypothesis is fail to rejected.
The result is statistically insignificant.
Let's say you conducted a t test to compare two samples. You calculated a t value...
Hi, I'm considering the following question: "Let's say we just calculated the t-test statistic for the following hypotheses: H0: mu <= 34, Ha: mu > 34. The sample size was 25, and the test statistic turned out to be -2.84. What would be the correct conclusion? A- Do not reject the H0 - the p-value is smaller than alpha B- Reject the H0 - the test statistic is more extreme than the critical value C- Reject the H0 - the...
Questivil 13 You calculated the below regression model at a 95% confidence level with 20 observations y = Bo + B1X1 + B2X2 + B3X3 + € If Bi = 8.4 and se1 = 4.2 is the variable statistically significant? Select the best answer and rationale below. Hint: Determine if you need to use the t-table or the z-table. Statistically significant. The test statistic < critical value. Not statistically significant. The test statistic > critical value. Statistically significant. The test...
Look at the table for the Paired samples test to find your t calculated, df, and significance. Remember that significance level will appear in the Sig (2-tailed) column. Any value that is smaller than .05 will be significant at the .05 level or higher. In a sentence describe the results and report them in APA style, including r2 and evaluation (you will need to calculate r2 by hand). 3. What type of error in hypothesis testing is possible given the...
Let's say that two other individuals conduct a similar test as above. Person 1 samples 10 dentists and finds that 8 recommend activated charcoal toothpaste (n = 10,). Person 2 samples 1000 dentists and finds that 800 recommend activated charcoal toothpaste (n= 1000,). a. Conduct a z-test for proportions against p = 0.9 for each person using the 6-step process. Use alpha = 0.05. b. Construct a 95% confidence interval for the population proportion for each person. C. Between you,...
A related samples t test is conducted when comparing ______. Group of answer choices a. means from two different samples b. your sample mean from the population mean c. means from same samples but in different situations d. means from three different samples
Compare and contrast the differences between a single sample t test and an independent samples t test. Next describe a hypothetical study using the design of an independent samples t test. List the two groups that you would test.
2. Look at the Independent samples t-test table to get your t calculated, df, and significance. Read the line that says “equal variances assumed”. Remember that significance level will appear in the Sig (2-tailed) column. Any value that is smaller than .05 will be significant at the .05 level or higher. In a sentence describe the results and report them in APA style, including r2 and evaluation (you will need to calculate r2 by hand). 3. What type of error...
in order to compare the means of two populations, independent random samples of 400 observations are selected from each population with the results: sample 1: x1= 5275 and s1= 150 sample 2: x2= 5240 and s2 = 200 a. use a 95% confidence interval to estimate the difference between the population means (m1-m2) interpret the difference. b. test the null hypothesis (m1-m2 = 0) versus the alternative (m1-m2 isn't = to 0). give the p-value of the test and interpret...
Twenty undergraduate students were given t Dependent Samples t-test Badate students were given two versions of a Sitem test. Half of the 20 weerst given the multiple choice version of the test They were then given the same test questions presented in open-ended form s presented in open-ended form (without choices). The other half were given open-ended form of the test first followed by the multiple-choice version. The data Ociow list the number of correct answers on each test for...
Find the critical t-value(s) for a two independent samples t-test given: α = 0.05 n1 = 12 n2 = 11 two-tailed test