QUESTION 24

1. The following are the grades received on an exam by 20 students.

7161658188889378778887957683847966928668

Fill in the frequency table below using the data given with the 10-point bin.

Grade Frequency Relative Frequency Cumulative Frequency

60 -69

70 - 79

80 - 89

90 - 99

Total: None

QUESTION 21

1. In a study of the Gender Aide method of gender selection used to increase the likelihood of a baby beingborn a girl, 2000 users of the method gave birth to 980 boys and 1020 girls. There is about 22% chance ofgetting that many girls if the method had no effect.

Does the result has a practical significance? Explain

QUESTION 20

1. An election eve poll finds that 52% of surveyed voters plan to vote for Smith, and she needs a majority (more than 50%) to win without a runoff. The margin of error is 2.5 percentage points. Will she win? Explain