chapter 9 bstat questions well answered
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Chapter 9Hypothesis Testing - correct answer ✔✔§Developing Null and Alternative Hypotheses
§Type I and Type II Errors
§Population Mean: s Known
§Population Mean: s Unknown
§Population Proportion
§Hypothesis testing can be used to determine whether a statement about the value of a
population parameter should or should not be rejected.
§The null hypothesis, denoted by H0 , is a tentative assumption about a population parameter.
§The alternative hypothesis, denoted by Ha, is the opposite of what is stated in the null
hypothesis.
§The hypothesis testing procedure uses data from a sample to test the two competing
statements indicated by H0 and Ha.
Developing Null and Alternative Hypotheses - correct answer ✔✔§It is not always obvious how
the null and alternative hypotheses should be formulated.
§Care must be taken to structure the hypotheses appropriately so that the test conclusion
provides the information the researcher wants.
§The context of the situation is very important in determining how the hypotheses should be
stated.
§In some cases it is easier to identify the alternative hypothesis first. In other cases the null is
easier.
§Correct hypothesis formulation will take practice.
, qAlternative Hypothesis as a Research Hypothesis
§
§Many applications of hypothesis testing involve an attempt to gather evidence in support of a
research hypothesis.
§In such cases, it is often best to begin with the alternative hypothesis and make it the
conclusion that the researcher hopes to support.
§The conclusion that the research hypothesis is true is made if the sample data provide
sufficient evidence to show that the null hypothesis can be rejected.
§We might begin with a belief or assumption that a statement about the value of a population
parameter is true.
§We then using a hypothesis test to challenge the assumption and determine if there is
statistical evidence to conclude that the assumption is incorrect.
§In these situations, it is helpful to develop the null hypothesis first.
Developing Null and Alternative Hypotheses examples - correct answer ✔✔qAlternative
Hypothesis as a Research Hypothesis
Example:
A new teaching method is developed that is believed to be better than the current method.
üAlternative Hypothesis:
The new teaching method is better.
üNull Hypothesis:
The new method is no better than the old method.
qAlternative Hypothesis as a Research Hypothesis
Example:
A new sales force bonus plan is developed in an attempt to increase sales.
graded A+ updated
Chapter 9Hypothesis Testing - correct answer ✔✔§Developing Null and Alternative Hypotheses
§Type I and Type II Errors
§Population Mean: s Known
§Population Mean: s Unknown
§Population Proportion
§Hypothesis testing can be used to determine whether a statement about the value of a
population parameter should or should not be rejected.
§The null hypothesis, denoted by H0 , is a tentative assumption about a population parameter.
§The alternative hypothesis, denoted by Ha, is the opposite of what is stated in the null
hypothesis.
§The hypothesis testing procedure uses data from a sample to test the two competing
statements indicated by H0 and Ha.
Developing Null and Alternative Hypotheses - correct answer ✔✔§It is not always obvious how
the null and alternative hypotheses should be formulated.
§Care must be taken to structure the hypotheses appropriately so that the test conclusion
provides the information the researcher wants.
§The context of the situation is very important in determining how the hypotheses should be
stated.
§In some cases it is easier to identify the alternative hypothesis first. In other cases the null is
easier.
§Correct hypothesis formulation will take practice.
, qAlternative Hypothesis as a Research Hypothesis
§
§Many applications of hypothesis testing involve an attempt to gather evidence in support of a
research hypothesis.
§In such cases, it is often best to begin with the alternative hypothesis and make it the
conclusion that the researcher hopes to support.
§The conclusion that the research hypothesis is true is made if the sample data provide
sufficient evidence to show that the null hypothesis can be rejected.
§We might begin with a belief or assumption that a statement about the value of a population
parameter is true.
§We then using a hypothesis test to challenge the assumption and determine if there is
statistical evidence to conclude that the assumption is incorrect.
§In these situations, it is helpful to develop the null hypothesis first.
Developing Null and Alternative Hypotheses examples - correct answer ✔✔qAlternative
Hypothesis as a Research Hypothesis
Example:
A new teaching method is developed that is believed to be better than the current method.
üAlternative Hypothesis:
The new teaching method is better.
üNull Hypothesis:
The new method is no better than the old method.
qAlternative Hypothesis as a Research Hypothesis
Example:
A new sales force bonus plan is developed in an attempt to increase sales.
