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Dr. Jones wants to test whether a finch-like bird in Hawaii is a different species from the finches found in New Zealand. Beak length is used to distinguish finches from other species of birds, so Dr. Jones is going to compare the beak length of a sample of the finch-like birds from Hawaii to the beak length of the population of finches. Suppose that Dr. Jones uses a 2-tailed statistical test. What is the null hypothesis?

A. The finch-like birds in Hawaii are not finches.
B. The beak length of the finch-like birds in Hawaii is different from the beak length of the population of finches.
C. The beak length of the finch-like birds in Hawaii is less than the beak length of the population of finches.
D. The finch-like birds in Hawaii are finches.

Answer :

The null hypothesis for Dr. Jones's study comparing the beak length of finch-like birds in Hawaii to the beak length of the population of finches is: B. The beak length of the finch-like birds in Hawaii is different from the beak length of the population of finches.

The answer is option~B

This null hypothesis is based on the premise that Dr. Jones wants to determine if there is a significant difference in beak length between the two groups of birds. By setting up the null hypothesis in this way, Dr. Jones is essentially stating that there is no difference in beak length between the finch-like birds in Hawaii and the population of finches.

In hypothesis testing, the null hypothesis is the default assumption that there is no significant difference or effect. The alternative hypothesis, which is not provided in the given options, would typically be that there is a significant difference in beak length between the two groups of birds.

The answer is option~B

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