WorksheetsCFU: null hypothesis and p-values
Total questions: 8
Worksheet time: 6mins
The hypothesis that two groups are the same.
Alternative hypothesis
Experimental hypothesis
Null hypothesis
Statistical hypothesis
Which of the following is NOT a null hypothesis?
Cats are no smarter than dogs
Americans enjoy hot dogs twice as much as hamburgers
There is no difference in test scores of students who drink coffee and those that don't
Students spend as much time on TikTok as on Instagram
The threshold for "significance" in biology is usually alpha = 0.05. What can you conclude if the p-value is < 0.05?
Reject the null hypothesis - the two groups are statistically significantly different
Reject the null hypothesis - the two groups are NOT statistically significantly different
Fail to reject the null hypothesis - the two groups are statistically significantly different
Fail to reject the null hypothesis - the two groups are NOT statistically significantly different
p = 0.83
Reject the null hypothesis
Fail to reject the null hypothesis
p = 0.47
Reject the null hypothesis
Fail to reject the null hypothesis
p = 0.0203
Reject the null hypothesis
Fail to reject the null hypothesis
p = 0.01
The two groups are statistically significantly different
The two groups are NOT statistically significantly different
How likely it is to get a result like the observed result if the null hypothesis is true.
Alternative hypothesis
Chi-squared value
Critical value
p-value
