# The scientists have collected a number of Black Bream fish. Their lengths have been recorded in the Excel file. State the mean length of Black Bream fish to the nearest centimetre. 1State the median length of Black Bream fish to the nearest centimetre. 1State the range of lengths of Black Bream fish to the nearest centimetre. 1State the standard deviation of the sample of the lengths of Black Bream fish to three decimal places. 1 QUESTION 6(6 marks) Scientists collected water samples and counted the number of Brine shrimp in each sample.A histogram can be found in the Excel file showing this data. How many samples contained 3 or fewer Brine shrimp? 1What is the modal number of Brine shrimp? 1What is the mean number of Brine shrimp in each sample, to one decimal place? 1Produce a cumulative frequency histogram and polygon (ogive) showing the number of Brine shrimp in each sample. 3 QUESTION 7(4 marks)

Comments Off on The scientists have collected a number of Black Bream fish. Their lengths have been recorded in the Excel file. State the mean length of Black Bream fish to the nearest centimetre. 1State the median length of Black Bream fish to the nearest centimetre. 1State the range of lengths of Black Bream fish to the nearest centimetre. 1State the standard deviation of the sample of the lengths of Black Bream fish to three decimal places. 1 QUESTION 6(6 marks) Scientists collected water samples and counted the number of Brine shrimp in each sample.A histogram can be found in the Excel file showing this data. How many samples contained 3 or fewer Brine shrimp? 1What is the modal number of Brine shrimp? 1What is the mean number of Brine shrimp in each sample, to one decimal place? 1Produce a cumulative frequency histogram and polygon (ogive) showing the number of Brine shrimp in each sample. 3 QUESTION 7(4 marks)

The scientists have collected a number of Black Bream fish. Their lengths have been recorded in the Excel file.

State the mean length of Black Bream fish to the nearest centimetre. 1State the median length of Black Bream fish to the nearest centimetre. 1State the range of lengths of Black Bream fish to the nearest centimetre. 1State the standard deviation of the sample of the lengths of Black Bream fish to three decimal places. 1
QUESTION 6(6 marks)

Scientists collected water samples and counted the number of Brine shrimp in each sample.A histogram can be found in the Excel file showing this data.

How many samples contained 3 or fewer Brine shrimp? 1What is the modal number of Brine shrimp? 1What is the mean number of Brine shrimp in each sample, to one decimal place? 1Produce a cumulative frequency histogram and polygon (ogive) showing the number of Brine shrimp in each sample. 3
QUESTION 7(4 marks)

A Pareto chart has been partially completed showing the quantities of different species of frogs in the wetlands. The line graph has been completed but the columns are missing.

Which species of frog is most common? 1What percentage of frogs were Southern corroboree frogs? 1There were 40 Southern bell frogs. How many frogs were there in total? 1How many Spotted marsh frogs were there? 1
QUESTION 8 (10 marks)

A number of pelicans were recorded in the study. Their weights are recorded in the Excel file.
Complete this two-way table: 2

Males

Females

Total

8kg or less

More than 8kg

Total

b.For male pelicans:

Produce a five-number summary of the data. 2Find any outliers, showing all working. 2Produce a parallel box plot showing the weights of both the male and female pelicans. Make sure you find all outliers and indicate them on the box plot. 2Compare the distribution of weights of male and female pelicans. 2
QUESTION 9(12 marks)

In a separate study, scientists collected data on 16 different Green tree frog tadpoles living in captivity. The age (days since hatching) and length of each Green tree frog tadpole has been recorded in the Excel file.Create a scatter plot showing the age and length of Green tree frog tadpoles with the length as the dependent variable. 2State Pearson’s correlation coefficient for the data, correct to three decimal places. 1Describe the strength and direction of the association. 2State the equation of your least-squares regression line of best fit.
Give your coefficients to 3 decimal places. 2How long would you expect a one-week-old Green tree frog tadpole to be?