Statistics and Probability

The sample mean is 83, the sample size is 39, and the standard deviation is 5. Use 𝛼 = 0.05.

• Z-test

• T-test

The sample mean is 10, the sample standard deviation is 6.1, and the sample size is 9.

• Z-test

• T-test

The population is approximately normal. The sample mean is 219.3, the sample standard deviation is 13.12, and the sample size is 22. Use 𝛼 = 0.05.

• Z-test

• T-test

The population follows a normal distribution with a standard deviation of 7.18, sample mean of 118.7, and sample size of 21.

• Z-test

• T-test

The population follows a normal distribution with a standard deviation of 7.18, sample mean of 118.7, and sample size of 21.

• Z-test

• T-test

The population follows a normal distribution with a standard deviation of 7.18, sample mean of 118.7, and sample size of 50.

• Z-test

• T-test