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#### mmatusevici1

##### New member

- May 7, 2013

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Hello. I was just wandering if anyone could help. I've been doing a couple of statistics questions, and when they ask for some questions, I am not sure if I have an appropriate understanding of what the right answer should be. I would really like to understand this material, so what I want to know is your opinions which are the right answers and why? Thank you.

0. Which one of these graphs is NOT an appropriate way of visualising the distribution of your data?

A. A box plot

B. A cumulative frequency curve

C. A scatter plot

D. A frequency histogram

1. When setting the significance level at which to test your hypothesis, what does a probability level of 0.05 mean?

A.There is a 0.05% probability that your result could have occurred by chance

B.There is a 5% probability that your result could have occurred by chance

C. There is a 0.95% probability that your result could have occurred by chance

D. There is a 95% probability that your result could have occurred by chance

2. You have a dataset containing 10 values and conducted a one-sample t test against an expected mean value. Your test statistic (t) was 2.23 and the critical value of t at the 0.05 level with 9 degrees of freedom is 2.26. How would you interpret this result?

A. The difference is significant at the 0.05 level so do not reject the H0.

B. The difference is significant at the 0.05 level so reject the H0.

C. The difference is not significant at the 0.05 level so do not reject the H0.

D. The difference is not significant at the 0.05 level so reject H0.

3.You have measure the suspended sediment of water samples taken from a variety of sites along a stream. What TYPE of data is this?

A. Nominal

B.Ordinal

C.Interval

D.Ratio

Thank you. I would really appreciate your help.

0. Which one of these graphs is NOT an appropriate way of visualising the distribution of your data?

A. A box plot

B. A cumulative frequency curve

C. A scatter plot

D. A frequency histogram

1. When setting the significance level at which to test your hypothesis, what does a probability level of 0.05 mean?

A.There is a 0.05% probability that your result could have occurred by chance

B.There is a 5% probability that your result could have occurred by chance

C. There is a 0.95% probability that your result could have occurred by chance

D. There is a 95% probability that your result could have occurred by chance

2. You have a dataset containing 10 values and conducted a one-sample t test against an expected mean value. Your test statistic (t) was 2.23 and the critical value of t at the 0.05 level with 9 degrees of freedom is 2.26. How would you interpret this result?

A. The difference is significant at the 0.05 level so do not reject the H0.

B. The difference is significant at the 0.05 level so reject the H0.

C. The difference is not significant at the 0.05 level so do not reject the H0.

D. The difference is not significant at the 0.05 level so reject H0.

3.You have measure the suspended sediment of water samples taken from a variety of sites along a stream. What TYPE of data is this?

A. Nominal

B.Ordinal

C.Interval

D.Ratio

Thank you. I would really appreciate your help.

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