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What is the alternative hypothesis

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A researcher is interested in studying whether a new mobile app can help to reduce depression. She gives 14 participants the new app and measures their depression levels before using the app, and after using the app to see if depression levels change.

What is the null hypothesis for scenario 4? 

H0: X = µ

H0: µposttest = µpretest

H0: r = 0

H0: µ1 = µ2 =µ3

What is the alternative hypothesis for scenario 4?

H1: µposttest ≠µpretest

H1: Rxy > 0

H1: µ1 ≠ µ2 ≠µ3

H1: X ≠ µ

What is the independent variable for scenario 4?

The phones the participants use

Before and after app use

The participants

Depression levels

What is the dependent variable for scenario 4?

The participants

Depression levels

Before and after app use

The phones the participants use

What is the most appropriate test statistic to use to test the hypothesis in scenario 4?

z-score

independent samples t-test

regression

dependent samples t-test

z-test

One-way ANOVA

correlation coefficient

Reference no: EM132413750

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