a. Calculate the standard deviation, s, for the fruit mass data on page 495. Use the formula:

Show each step in your working.

b. Calculate the standard error, S_M, for this set of data. Use the formula:

Show each step in your working.

c. A sample of lemon fruits was taken from a different population of lemon trees. The mean mass of this sample of fruits was 84 g. The standard error was 0.52.

Draw a bar chart to show the means of the fruit masses for these two populations.

Draw error bars on your bar chart, and add a key to explain what the error bars represent.

d. Are the diff erences between the masses of the fruits in the two different populations significant? Explain your answer.

Transcribed Image Text:

E(x–x)2 S= n-1