Results from a research article indicate that there is a significant difference

Question

Results from a research article indicate that there is a significant difference between two groups for an independent-measures design with t = 2.46 and df = 33. What is the total number of participants? 33 34 35 40 Which of the following is an indicator that you would use a t-test instead of a z-test? You know the population means and population standard deviation, you do not know the population means hurt you know the population standard deviation You know the population means but you do not the population standard deviation. You have an estimate of the population mean from the sample, Both B and C. None of the above Which of the following is not an assumption that should be satisfied before you use the independent-measures t-test for hypothesis testing? the two populations from which the samples are selected must be normal To justify using the pooled variance, the two populations from which the samples are selected must have equal variances the observations within each sample must be independent All of the above should be satisfied before using the independent-measures t formula for hypothesis testing

Explanation / Answer

1) Degrees of freedom = n1 + n2 - 2 = 33 (Given)

So,

Total number of participants = n1 + n2 = 33 + 2 = 35

Option C is correct.

2) Option C is correct.

3) Option D is correct.

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