7. Hypothesis Testing: Introduction to Hypothesis Testing
Computing the p-value and Making a Decision
The amount of dissolved oxygen in water (mg per liter) is normally distributed with unknown mean and standard deviation .
A researcher collects one-liter water specimens from randomly-selected locations along a river and measures the amount of dissolved oxygen in each specimen.
The researcher plans on using a -test to determine if the mean oxygen content of the river significantly differs from mg per liter, at the level of significance.
State the null and alternative hypotheses of the proposed test.
A researcher collects one-liter water specimens from randomly-selected locations along a river and measures the amount of dissolved oxygen in each specimen.
The researcher plans on using a -test to determine if the mean oxygen content of the river significantly differs from mg per liter, at the level of significance.
State the null and alternative hypotheses of the proposed test.
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