What Were the Results of the Life-Sciences Experiments Aboard the Viking

question 22

Multiple Choice

What were the results of the life-sciences experiments aboard the Viking landers?

• A) strong reactions releasing oxygen from apparent biological causes (e.g., bacteria)
• B) none at all; the Martian soil is completely chemically inert and biologically sterile.
• C) strong reactions releasing oxygen but from nonbiological causes
• D) slight fizzing due to released carbon dioxide but very little else

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Definitions:

Correlation Coefficient

A measure indicating the extent to which two variables change together, ranging from -1 to 1.

One-tailed Test

A hypothesis test in which the values for which we can reject the null hypothesis are located entirely in one tail of the probability distribution.

Two-tailed Test

A statistical hypothesis test in which the area of rejection is on both tails of the normal distribution, testing for the possibility of both positive and negative differences.

Chocolate Sales

The total quantity or revenue of chocolate products sold within a specific period.