Are you smarter than a first year UoE Psychology student?

Suppose we have a hypothesis test where the null hypothesis is that the test statistic of interest = 0.

I wish to run a two-tailed hypothesis test. 

Which of the following correctly describes the alternative hypothesis?

• H_1: test statistic = 0

• H_1: test statistic > 0

• H_1 test statistic < 0

After finishing a study and conducting a hypothesis test, a researcher is able to accept the alternative hypothesis.

• True

• False

In a two-tailed hypothesis test with a = 0.01, what percentage of the distribution will be within the lower tail critical region?

(a)  

Tom has a jar of 20 Jelly Beans. He has 5 “Juicy Pear”, 2 “Kiwi”, 8 “Buttered Popcorn”, 2 “Blueberry”, 3 “Green Apple”.  You pick out one Jelly Bean at random. What is the probability that you pick out a “Juicy Pear”?

• 1/4

• 0.3

• 20/100

• 2/10

Which word best describes the collection of data from the entire population?

• Survey

• Sample

• Census

• Data

The highest bar in a histogram is always located at which of the following?  

• Mean

• Mode

• Median

• Quartile

• Standard deviation

What is your best estimate of the mean in this approximately normal density curve?

• 3

• 4

• 2

• 0

What affects the power of a statistical test?

• Sample size and variability

• Sample size, significance level and the effect size

• Variability and significance level

• Effect size and variability

Which of the following statements about a 95% confidence interval is correct?

• Across multiple random samples, 95% of the constructed confidence intervals would be expected to contain the true population parameter value.

• 95% of all possible sample estimates fall within the range of the interval

• There is a 95% chance that the confidence interval contains the true population parameter.

• 95% of all of the data values in the population fall within the interval