t-test checkpoint

This refers to the maximum number of independent values which varies in the data sample.

• Level of significance

• Percentiles

• Degree of freedom

• Probability

Which best describes the purpose of a t-test?

• It is a type of descriptive statistics.

• It is used to determine if there are significant differences.

• It can be used as long as the data is not normally distributed

• All of the above.

Which is true?

• P-Value < 0.05 - there's statistical difference

• P-Value < 0.05 - there's no statistical difference

• P-Value > 0.05 - there's statistical difference

• None of the above

Which type of test can we use when the samples are the same size and interact with each other?

• one sample t-test

• paired t-test

• unpaired t-test

• Standard deviation

what type of t-test would be used to calculate the statistical difference in this population?

• single sample t-test

• paired t-test

• unpaired t-test

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

Which statement best describes a null hypothesis?

• states that there is a significant difference between the means of the two groups.

• states that there is no significant difference between the means of the two groups.

Organize these options into the correct t-test

Groups:

(a) paired t-test

,

(b) unpaired t-test

• two groups of different sizes that interact with each other

• a study of year 7 exam results compared to year 9 exam results for the same year

• a study of students exam results at the beginnign of the year and the end of the year

• two groups of equal size that are independent of each other

• two groups of equal size that interact with each other

Which term does this statement best define:

'There is a significant difference between the two population means, and that this difference is unlikely to be caused by sampling error or chance.'

• null hypothesis

• alternate hypothesis

• degrees of freedom

• variance

Which test should be used for the following study?

• 'Research during which there are two independent groups, such as women and men, that examines whether the average bone density is significantly different between the two groups.'

• single sample t-test

• paired t-test

• unpaired t-test

Which test should be used for the following study?

• 'Body temperature using two different thermometers on the same group of participants.'

• single sample t-test

• paired t-test

• unpaired t-test