Statistics Questions Fundamentals 2026
Exam Questions and Answers | 100% Pass
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A new headache remedy was given to a group of 25 subjects who had headaches. Four hours
after taking
the new remedy, 20 of the subjects reported that their headaches had disappeared. From this
information you conclude:
a. that the remedy is effective for the treatment of headaches.
b. nothing, because the sample size is too small.
c. nothing, because there is no control group for comparison.
d. that the new treatment is better than aspirin.
e. that the remedy is not effective for the treatment of headaches.
c. nothing, because there is no control group for comparison.
There are ten departments at SMART University. To conduct a survey, a researcher selects ten
faculty
members randomly from each department. The sample selected in this way is called a:
a. Simple random sample.
b. Systematic sample.
c. Stratified random sample.
d. Voluntary response sample.
e. Multistage sample.
c. Stratified random sample.
, There are two statistics classes. The first has 350 students and the second has 250 students. In
the first
class the students are instructed to each toss a coin 20 times and record the value of p$ , the
proportion of heads. The instructor them makes a histogram of the 350 values of p$ obtained.
The second class did the same, except that each student tossed a coin 40 times. The histogram
of p$ values for the first class should be
a. more biased since it is based on a smaller number of tosses.
b. less biased since it is based on a larger number of students.
c. more variable since it is based on a smaller number of tosses.
d. less variable since it is based on a larger number of students.
c. more variable since it is based on a smaller number of tosses.
A polling agency took a random sample of 1000 likely voters in Florida (population: about 18
million),
and another random sample of 1000 likely voters in New Mexico (population: about 2 million).
Other things being equal, the sample from Florida would tend to be ___________ as the sample
from New Mexico.
a. 9 times as accurate
b. 3 times as accurate
c. as accurate
d. one third as accurate
e. one ninth as accurate
c. as accurate
Exam Questions and Answers | 100% Pass
Guaranteed | Graded A+ |
A new headache remedy was given to a group of 25 subjects who had headaches. Four hours
after taking
the new remedy, 20 of the subjects reported that their headaches had disappeared. From this
information you conclude:
a. that the remedy is effective for the treatment of headaches.
b. nothing, because the sample size is too small.
c. nothing, because there is no control group for comparison.
d. that the new treatment is better than aspirin.
e. that the remedy is not effective for the treatment of headaches.
c. nothing, because there is no control group for comparison.
There are ten departments at SMART University. To conduct a survey, a researcher selects ten
faculty
members randomly from each department. The sample selected in this way is called a:
a. Simple random sample.
b. Systematic sample.
c. Stratified random sample.
d. Voluntary response sample.
e. Multistage sample.
c. Stratified random sample.
, There are two statistics classes. The first has 350 students and the second has 250 students. In
the first
class the students are instructed to each toss a coin 20 times and record the value of p$ , the
proportion of heads. The instructor them makes a histogram of the 350 values of p$ obtained.
The second class did the same, except that each student tossed a coin 40 times. The histogram
of p$ values for the first class should be
a. more biased since it is based on a smaller number of tosses.
b. less biased since it is based on a larger number of students.
c. more variable since it is based on a smaller number of tosses.
d. less variable since it is based on a larger number of students.
c. more variable since it is based on a smaller number of tosses.
A polling agency took a random sample of 1000 likely voters in Florida (population: about 18
million),
and another random sample of 1000 likely voters in New Mexico (population: about 2 million).
Other things being equal, the sample from Florida would tend to be ___________ as the sample
from New Mexico.
a. 9 times as accurate
b. 3 times as accurate
c. as accurate
d. one third as accurate
e. one ninth as accurate
c. as accurate
