Question

At the 0.025 significance level, decide if the sample data support the claim that shelf life has increased. State your decision in terms of the null hypothesis. Draw an appropriate diagram to support your claim.

Answer 1

Solution:

Here data is missing, so we are writing general conditions.

If the test-statistic is higher than the critical value, then it falls in the rejection region, so we reject the Null Hypothesis. Otherwise, accept.

Given, $\alpha=0.025$

The t-value for significance level of $\alpha=0.025$ is $t=2.306$