Share
Explore BrainMass

# Testing of Hypothesis and Degrees of Freedom

1. How many different ways is it possible to get seven heads in a sample of twenty coin flips?

2.What is the probability of getting seven heads in a sample of twenty coin flips? Is this significantly different from the population in which P = 0.50 if the alpha is 0.05?

3. In which case would it be easier to reject the null hypothesis: a two-tailed test with an alpha of 0.10 or a one-tailed test with an alpha of 0.05?

4. What is the Chi-square value for an alpha of 0.01 with 10 degrees of freedom? If an obtained Chi-square value for 10 degrees of freedom at an alpha of 0.05 is 19.7, what is the researcher's decision in the hypothesis test?

5. The frequency distribution given below provides the distribution of mother's education from a sample taken from the National Youth Survey. Calculate the univariate Chi-square statistic, and determine if the sample is statistically different from a population in which the frequencies are hypothesized to be equal for all cells. State the null and alternate hypotheses, find the Chi-square critical value (for alpha of 0.01), and present the statistical decision.

Educational Level Frequency