BIOL 1441 TEST 1 QUESTIONS WITH 100% ACCURATE
SOLUTIONS
1) Bias in an experiment can occur when -- Answer ✔✔ a technician knows which
samples are from the control group
2) Which experimental scenario would likely produce the most trustworthy results?
-- Answer ✔✔ a double-blind study involving a new heart disease treatment
3) When graphing data, scientists plot the ________ on the x-axis -- Answer ✔✔
independent variable
4) Double-blind experiments are used so that the results will be more -- Answer
✔✔ objective
5) Scientists are often hesitant to believe the results of a single experiment testing a
particular hypothesis, even when the results are peer reviewed and statistically
significant. This is because -- Answer ✔✔ a single experiment may not have
eliminated all of the alternative hypotheses
, 6) When an experiment has a large sample size, and there is a large difference
between the results in the experimental and control groups, it is ________ that
the experimental results are statistically significant. -- Answer ✔✔ very likely
7) Sampling error can be reduced by -- Answer ✔✔ increasing the sample size
8) In statistics, a sample is a -- Answer ✔✔ small subgroup of a population
9) Experimental results with very high statistical significance mean that -- Answer
✔✔ a true difference between treatment and control groups likely exists
10) In an ideal experiment, there is a -- Answer ✔✔ low standard error
11) If the reported confidence interval for a population mean is 95%, then there is a -
- Answer ✔✔ 95% probability that the true mean is in the reported range
12) Which of the following is a standard probability that is accepted by most
researchers as statistical significance? -- Answer ✔✔ 5%
13) What does it mean to say that experimental results are peer reviewed? --
Answer ✔✔ The results are analyzed by other scientists before they are
published
14) The most trustworthy source of scientific information is -- Answer ✔✔ peer-
reviewed research publications
SOLUTIONS
1) Bias in an experiment can occur when -- Answer ✔✔ a technician knows which
samples are from the control group
2) Which experimental scenario would likely produce the most trustworthy results?
-- Answer ✔✔ a double-blind study involving a new heart disease treatment
3) When graphing data, scientists plot the ________ on the x-axis -- Answer ✔✔
independent variable
4) Double-blind experiments are used so that the results will be more -- Answer
✔✔ objective
5) Scientists are often hesitant to believe the results of a single experiment testing a
particular hypothesis, even when the results are peer reviewed and statistically
significant. This is because -- Answer ✔✔ a single experiment may not have
eliminated all of the alternative hypotheses
, 6) When an experiment has a large sample size, and there is a large difference
between the results in the experimental and control groups, it is ________ that
the experimental results are statistically significant. -- Answer ✔✔ very likely
7) Sampling error can be reduced by -- Answer ✔✔ increasing the sample size
8) In statistics, a sample is a -- Answer ✔✔ small subgroup of a population
9) Experimental results with very high statistical significance mean that -- Answer
✔✔ a true difference between treatment and control groups likely exists
10) In an ideal experiment, there is a -- Answer ✔✔ low standard error
11) If the reported confidence interval for a population mean is 95%, then there is a -
- Answer ✔✔ 95% probability that the true mean is in the reported range
12) Which of the following is a standard probability that is accepted by most
researchers as statistical significance? -- Answer ✔✔ 5%
13) What does it mean to say that experimental results are peer reviewed? --
Answer ✔✔ The results are analyzed by other scientists before they are
published
14) The most trustworthy source of scientific information is -- Answer ✔✔ peer-
reviewed research publications
