0.1 / 0.1 pts Question 1 Compared to a z-score, a hypothesis test with a t statistic requires more information from the sample. True False Question 2 0.1 / 0.1 pts If a researcher is using a t statistic to test a null hypothesis about a population, what information is needed from the population to calculate the t statistic? You must know the population mean You must know the population variance or standard deviation You must know the population mean and the variance or standard deviation The t statistic does not require any information about the population
0.1 / 0.1 pts Question 3 On average, what value is expected for the t statistic when the null hypothesis is true? 0 1 1.96 t>1.96 Question 4 0.1 / 0.1 pts When n is small (less than 30), how does the shape of the t distribution compare to the normal distribution? It is almost perfectly normal. It is flatter and more spread out than the normal distribution. It is taller and narrower than the normal distribution. There is no consistent relationship between the t distribution and the normal distribution.
0.1 / 0.1 pts Question 5 Which of the following samples will have the smallest value for the estimated standard error? n= 25 with s2 = 100 n= 25 with s2 = 400 n= 100 with s2 = 100 n= 100 with s2 = 400 Question 6 0.1 / 0.1 pts A researcher conducts a one sample hypothesis test using a sample of n = 40 from an unknown population. What is the df value for the t statistic? 39 40 41 42