Cell Review
SBI4U Exam Review
Topic 1
1. The table below shows the level of hemoglobin measured in two different groups of athletes.
Hemoglobin / grams per 100 cm3
Number of athletes tested
Standard deviation / grams per 100 cm3
Group A
12.6
200
0.8
Group B
11.9
220
3.2
Which of the following statements is correct?
A. Results from group B are more accurate because more athletes were tested.
B. Results from group B are more reliable because it has a higher standard deviation.
C. More athletes have their hemoglobin concentration close to the mean in group A than in group B.
D. These results indicate that the level of hemoglobin follows a normal distribution.
(Total 1 mark)
2. Which hypothesis can be tested using the t-test?
A. The difference in variation between two samples is not significant.
B. The difference between observed values and expected values is not significant.
C. The change in one variable is not correlated with a change in another variable.
D. The difference between the means in two samples is not significant.
(Total 1 mark)
3. The lengths of a sample of tiger canines were measured. 68% of the lengths fell within a range between 15 mm and 45 mm. The mean was 30 mm. What is the standard deviation of this sample?
A. 5 mm
B. 15 mm
C. 7.5 mm
D. 30 mm
(Total 1 mark)
4. What does the following scatter graph show? A. No correlation between these variables
B. Strong positive correlation between these variables
C. Strong negative correlation between these variables
D. Weak negative correlation between these variables
(Total 1 mark)
5. What does the size of the standard deviation indicate about data?
A. How accurately the data were measured
B. How widely the data are spread above and below the mean
C. Whether the mean is larger or smaller than it should be
D. Whether the reliability of the data is greater or less than 68%
(Total 1 mark)
Ans: C,D,B,B,B
Topic 2:
1. Which of the following will contribute to the
Topic 1
1. The table below shows the level of hemoglobin measured in two different groups of athletes.
Hemoglobin / grams per 100 cm3
Number of athletes tested
Standard deviation / grams per 100 cm3
Group A
12.6
200
0.8
Group B
11.9
220
3.2
Which of the following statements is correct?
A. Results from group B are more accurate because more athletes were tested.
B. Results from group B are more reliable because it has a higher standard deviation.
C. More athletes have their hemoglobin concentration close to the mean in group A than in group B.
D. These results indicate that the level of hemoglobin follows a normal distribution.
(Total 1 mark)
2. Which hypothesis can be tested using the t-test?
A. The difference in variation between two samples is not significant.
B. The difference between observed values and expected values is not significant.
C. The change in one variable is not correlated with a change in another variable.
D. The difference between the means in two samples is not significant.
(Total 1 mark)
3. The lengths of a sample of tiger canines were measured. 68% of the lengths fell within a range between 15 mm and 45 mm. The mean was 30 mm. What is the standard deviation of this sample?
A. 5 mm
B. 15 mm
C. 7.5 mm
D. 30 mm
(Total 1 mark)
4. What does the following scatter graph show? A. No correlation between these variables
B. Strong positive correlation between these variables
C. Strong negative correlation between these variables
D. Weak negative correlation between these variables
(Total 1 mark)
5. What does the size of the standard deviation indicate about data?
A. How accurately the data were measured
B. How widely the data are spread above and below the mean
C. Whether the mean is larger or smaller than it should be
D. Whether the reliability of the data is greater or less than 68%
(Total 1 mark)
Ans: C,D,B,B,B
Topic 2:
1. Which of the following will contribute to the