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QUESTION 3 A sample mean, sample size, and population standard deviation are given. Use the one-mean z-test to perform the required hypothesis test at the given significance level. Use the critical-value approach. x? = 20.5, n = 11, ? = 7.1, H0: ? = 18.7; Ha: ? ? 18.7, ? = 0.01 z = -0.84; critical value = 2.575; do not reject H0 z = 0.84; critical value = 2.575; do not reject H0 z = 0.84; critical value = 1.96; do not reject H0 z = 0.84; critical value = 2.575; reject H0 QUESTION 4 A sample mean, sample size, and population standard deviation are given. Use the one-mean z-test to perform the required hypothesis test at the given significance level. Use the critical-value approach. x? = 51, n = 36, ? = 3.6, H0: ? = 50; Ha: ? > 50, ? = 0.01 z = 1.67; critical value = 2.33; reject H0 z = 1.67; critical value = 2.33; do not reject H0 z = 1.67; critical value = 1.33; reject H0 z = 0.28; critical value = 2.33; do not reject H0

          QUESTION 3
A sample mean, sample size, and population standard deviation are given. Use the one-mean z-test to perform the required hypothesis test at the given significance level. Use the critical-value approach.
x? = 20.5, n = 11, ? = 7.1, H0: ? = 18.7; Ha: ? ? 18.7, ? = 0.01
z = -0.84; critical value = 2.575; do not reject H0
z = 0.84; critical value = 2.575; do not reject H0
z = 0.84; critical value = 1.96; do not reject H0
z = 0.84; critical value = 2.575; reject H0

QUESTION 4
A sample mean, sample size, and population standard deviation are given. Use the one-mean z-test to perform the required hypothesis test at the given significance level. Use the critical-value approach.
x? = 51, n = 36, ? = 3.6, H0: ? = 50; Ha: ? > 50, ? = 0.01
z = 1.67; critical value = 2.33; reject H0
z = 1.67; critical value = 2.33; do not reject H0
z = 1.67; critical value = 1.33; reject H0
z = 0.28; critical value = 2.33; do not reject H0

QUESTION 3
A sample mean, sample size, and population standard deviation are given. Use the one-mean z-test to perform the required hypothesis test at the given significance level. Use the critical-value approach.
x? = 20.5, n = 11, ? = 7.1, H0: ? = 18.7; Ha: ? ? 18.7, ? = 0.01
z = -0.84; critical value = 2.575; do not reject H0
z = 0.84; critical value = 2.575; do not reject H0
z = 0.84; critical value = 1.96; do not reject H0
z = 0.84; critical value = 2.575; reject H0

QUESTION 4
A sample mean, sample size, and population standard deviation are given. Use the one-mean z-test to perform the required hypothesis test at the given significance level. Use the critical-value approach.
x? = 51, n = 36, ? = 3.6, H0: ? = 50; Ha: ? > 50, ? = 0.01
z = 1.67; critical value = 2.33; reject H0
z = 1.67; critical value = 2.33; do not reject H0
z = 1.67; critical value = 1.33; reject H0
z = 0.28; critical value = 2.33; do not reject H0

Added by Vernon C.

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