Question 1: Which of the following would be an appropriate null hypothesis? a) T

Question

Question 1: Which of the following would be an appropriate null hypothesis?

a)

The means of two samples are equal.

b)

The means of two populations are equal.

c)

Both (a) and (b) are true.

d)

Neither (a) nor (b) is true.

Question 2: Which of the following would be an appropriate alternative hypothesis?

a)

The mean of two populations are equal.

b)

The means of two samples are equal.

c)

The mean of one population is greater than the other.

d)

The mean of one sample is greater than the other.

Question 3 : If a manager wishes to determine whether there is evidence that one store has greater sales than the other

a)

either a one-tailed or two-tailed test could be used with equivalent results.

b)

a one-tailed test should be utilized.

c)

a two-tailed test should be utilized.

d)

None of the above.

a)

The means of two samples are equal.

b)

The means of two populations are equal.

c)

Both (a) and (b) are true.

d)

Neither (a) nor (b) is true.

Explanation / Answer

Ans:

1)The means of two populations are equal.

Option b is correct.

2)The mean of one population is greater than the other.

option c is correct.

(sample mean is not a parmaeter to test)

3)Option b is correct.

One tailed test should be used.(as directional i.e greater than)

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