How would you justify using the t-test? "Because the experiment...

... involves comparing the mean values of two sets of data"

Which statement is a suitable null hypothesis?

There is no correlation between chocolate consumption & age

Which statement is a suitable alternate hypothesis?

There is a difference in the effect of dark & milk chocs

How would you justify using the chi-squared test? "Because the experiment...

... involves data that are categoric"

Population A has 1000 organisms, while population B has 5 organisms.

There is a difference between the measured populations, The measured difference is 995 organisms

p<0.05, so the difference is significant

and the null hypothesis should be rejected

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Hypothesis and Stats Tests

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Maths in Biology: Hypotheses and Stats Tests

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Questions 15

Answers

1
The probability of observing the results by chance is >0.05, so the difference is significant
True
False
2
Which test? "There is no difference in the mean height of giraffes eating pasta vs. bread"
Standard deviation
Students' t-test
Chi-squared
Correlation coefficient
3
How would you justify using the t-test? "Because the experiment...
... involves comparing the mean values of two sets of data"
... involves an association between two sets of data"
... involves comparing the values of two sets of data"
... involves data that are categoric"
4
p<0.01, so the difference is significant
True
False
5
Which statement is a suitable null hypothesis?
The results of the experiment don't show a clear effect
There is no correlation between chocolate consumption & age
There is a correlation between chocolate consumption & age
Nothing happened in the chocolate age experiment
6
Which stats test? "There is no correlation between the height and body mass in giraffes"
Standard deviation
Correlation coefficient
Students' t-test
Chi-squared
7
A p-value of 0.005 is the same as
5%
50%
0.05%
0.5%
8
Which stats test? "There is no difference between the number of spots on tall vs pygmy tigers"
Standard deviation
Chi-squared
Correlation coefficient
Students' t-test
9
Which statement is a suitable alternate hypothesis?
There is a difference in the effect of dark & milk chocs
The results of the experiment showed there was no effect
The results showed there was an effect
There is no difference in the effect of dark & milk chocs
10
p>0.01, so the difference is significant
True
False
11
A p-value of 0.14 is the same as
0.14%
14%
140%
1.4%
12
How would you justify using the chi-squared test? "Because the experiment...
... involves comparing the mean values of two sets of data"
... involves an association between two sets of data"
... involves data that are categoric"
... involves comparing the values of two sets of data"
13
Conventionally in statistics for biology, we use a p-value of:
0.05
5
0.01
0.5
14
Population A has 1000 organisms, while population B has 5 organisms.
There is a difference between the measured populations
The measured difference is not significant
The measured difference is significant
The measured difference is 995 organisms
15
p<0.05, so the difference is significant
and the results are false
and the null hypothesis should be rejected
and the results are true
and the null hypothesis should be accepted

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