Use the One-Proportion Z-Test to Perform the Specified Hypothesis Test

question 4

Multiple Choice

Use the one-proportion z-test to perform the specified hypothesis test. Use the critical-value approach.
- $\mathrm { x } = 30 , \mathrm { n } = 169 , \mathrm { H } _ { 0 } : \mathrm { p } = 0.11 , \mathrm { H } _ { \mathrm { a } } : \mathrm { p } \neq 0.11 , \alpha = 0.05$

• A)\(\mathrm { z } = 1.36\); critical values \(= \pm 1.96\); do not reject \(\mathrm { H } _ { 0 }\)
• B) \(\mathrm { z } = 2.81\).; critical values \(= \pm 1.645\); reject \(\mathrm { H } _ { 0 }\)
• C) \(\mathrm { z } = 1.36\).; critical values \(= \pm 1.645\); do not reject \(\mathrm { H } _ { 0 }\)
• D) \(\mathrm { z } = 2.81\).; critical values \(= \pm 1.96\); reject \(\mathrm { H } _ { 0 }\)

Identify alternatives to random assignment in experiments.

Explain how confounding variables affect internal validity in experiments.

Describe the rationale behind random assignment in experiments.

Interpret correlation coefficients and their implications.

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