Q3. Marks: Practical and theory marks for a random sample of 10 chemistry students were as follows:

STUDENT A B C D E F G H I J

PRACTICAL 63 83 54 63 71 45 68 68 62 52

THEORY 50 75 60 56 63 32 55 69 67 43

Test the hypothesis that on average both types of assessment produce the same marks.

Q4. Heights of Tall Buildings: A researcher estimates that the average height of the buildings of 30 or more stories in a large city is at least 700 feet. A random sample of 9buildings is selected, and the heights in feet are shown. At = 0.025, is there enough evidence to reject the claim?

485511841725615520535635616