Question

When group is truly selected randomly from a population, the probability of its mean value being higher than the parameter mean is
a. 0.00
b. .50
c. 1.00
d. .33

Whenever the mean of the distribution of differences equals zero, then one can be fairly safe in concluding that:

a. the samples probably represent a single population
b. the samples probably represent different populations
c. there was absolutely no sampling error
d. actual standard score

Sampling error is assumed to result:

a. when any samples are selected
b. only when a non-representative sample is selected
c. only when a biased sample is selected
d. only when the researcher makes the mistake

Any sample which contains fewer than 50% of the total population:

a. must be biased
b. must be non-random
c. must be inaccurate
d. none of these

If the tabled value of t, for a certain number of degrees of freedom, was 3.17, and the calculated value of t was 3.18, then:

a. the null hypothesis is accepted
b. the null hypothesis is rejected
c. alpha becomes equal to zero
d. the t distribution must be normal

Any value which is based on having measured a sample is called a:

a. parameter
b. statistic
c. infinite measure
d. biased

If every 10th student entering the college library on Tuesday afternoon were selected for testing, the group thus selected would constitute a:

a. sample
b. random sample
c. quota sample
d. statistic

Answer 1

1.

When sample is truly randomly selected from population then sample mean is approximately equal to parameter mean.

Hence the probability of its mean value being higher than the parameter mean is 0.00

2.

The samples probably represents a single population, then only their mean difference is zero.

3.

When any samples are selected.

5.

If the tabled value of t, for a certain number of degrees of freedom, was 3.17, and the calculated value of t was 3.18, then the null hypothesis is rejected.

6.

Any value which is based on having measured a sample is called a statistic.

7.

If every 10th student entering the college library on Tuesday afternoon were selected for testing, the group thus selected would constitute a random sample.