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### Question 6 Summary:
The researcher is testing whether the average weight of a species of fish is 2 kg. A sample of 20 fish is taken, with a sample mean of 1.8 kg and a standard deviation of 0.5 kg. The test requires:

- (a) The null and alternative hypotheses.
- (b) The t-statistic.
- (c) The critical t-value at a significance level of 0.01 (two-tailed).
- (d) Determination of whether to reject the null hypothesis based on the t-statistic and critical value.

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### Part (a) - Null and Alternative Hypotheses:
- **Null Hypothesis (H₀):** The

A researcher wants to test whether the average weight of a certain species of fish is 2 kg. A sample of 20 fish is taken, yielding a sample mean weight of 1.8 kg with a standard deviation of 0.5 kg.

Learn how to perform hypothesis testing to check if the average weight of a species of fish is 2 kg using a sample of 20 fish. This problem covers hypothesis testing with the t-distribution, the t-statistic formula, and a significance level of 0.01.

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