Question

A two-tailed hypothesis test is being used to evaluate a treatment effect with α = .05. If the sample data produce a z-score statistic of z = -1.24, then what is the correct decision?

Reject the null hypothesis and conclude that the treatment has no effect.

Reject the null hypothesis and conclude that the treatment has an effect.

Fail to reject the null hypothesis and conclude that the treatment has an effect.

Fail to reject the null hypothesis and conclude that the treatment has no effect.

Answer #1

thank you.

a researcher conducts a hypothesis test to evaluate the effect
of the treatment. the hypothesis test produces a z-score of z=
2.75. Assuming that the researcher is using a two-tailed test,what
decision should be made?

Question #3
A researcher is conducting and experiment to evaluate a
treatment that is expected to increase the scores for individuals
in a population. If the researcher uses a one-tailed test with ( a
= .01), then which of the following correctly identifies the
critical region?
A. z > 2.33
B. z > 2.58
C. z < 2.33
D. z < 2.58
Question #4
A researcher evaluates a treatment effect using a two tailed
hypothesis test with ( a =...

a researcher conducts a hypothesis test to evaluate the effect
of the treatment that is expected to increases scores. the
hypothesis test produces a z-score of z= 2.75. if the researcher is
using a one tailed test, what is the correct statistical
decision?

For your answers pick one
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