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# Discovering Statistics

Statistics

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## Quiz 3 : The Phoenix of Statistics

A swim coach is assessing swimmers' satisfaction with a new training regime. He had a sample size of 22 and a p-value of 0.3. Does the coach recommend that the swimmers stop using the new training regime?
Free
Multiple Choice

D

In our previous example, the human resources manager had already calculated the probability of no girls joining her programme based on sector wide data. In the Bayesian approach, what sort of probability is this?
Free
Multiple Choice

B

A sports nutritionist undertook a study to examine the impact of a reduction in protein intake and team performance, which showed a statistical significance between reduced protein intake and increased team performance. How can she explain to her manager that this does not mean she should start removing protein from the team's diet?
Free
Multiple Choice

A

A researcher working in a sports performance lab was interested in gender and perception of pain during extreme sports and so conducted a t-test. The mean for males was 66.25 and the mean for females was 78.24, with both groups having a standard deviation of 7. What is the effect size using Cohen's d?
Multiple Choice
Your CEO has followed your advice and now wants you to measure effect sizes. You report a Pearson's r of 0.50 for the impact of Power Nylon shorts on athletic performance times. Your CEO wants to know if this is bad, as she remembers that a p-value of 0.30 is not good. What do you tell her?
Multiple Choice
A sports student conducted a Bayesian analysis of time spent watching sports and improved academic performance. He calculated a Bayes factor of 1. Should he use time spent watching sports as a predictor of academic performance?
Multiple Choice
Your sports and exercise lecturer has devoted the past ten weeks to teaching you the Bayesian approach and is now asking that you offer a critique of it. What key criticism could you raise?
Multiple Choice
Which of the following is not a factor in data analysts' over-use of p-values and NHST in sports and exercise research?
Multiple Choice
You work for a performance sports clothing company. Your CEO has just read a book on criticisms of the NHST and worries that all company data analysis is now flawed and will lead to huge financial losses. How might you reassure her?
Multiple Choice
You are the CEO of a sports performance forecasting company. You have decided to adopt a Bayesian approach to data analysis and modelling. When you announce this new policy, your staff are unhappy and unconvinced, as they are used to a NHST approach. You stress that the Bayesian approach has several key advantages, including which of the following.
Multiple Choice
A new member of a basketball coaching staff, whose team is at the bottom of the league, has just completed a study into factors that affect player performance levels. However, he finds only one statistically significant factor, which he includes in his report but deliberately, omits the other six non-significant findings. What is the term for what the coach has done?
Multiple Choice
A sports researcher wanted to assess the likelihood that girls score more goals than boys do in five a-side soccer. She conducted one study where the probability of making a Type I error was 0.05 and a Type II error was 0.2. Does her research have empirical probability?
Multiple Choice