The average age of NCAA competitors is 23 years old. The stu…

The average age of NCAA competitors is 23 years old. The study seeks to test if the average age of NCAA competitors is lower. A sample of NCAA competitors were randomly sampled, and the outcome of the sample average of NCAA competitors was 19. Assume a standard deviation of 2. At 90% confidence (p-value=0.10), and the z-score’s p-value (p-value = .0228), compare p-values and determine if there is sufficient evidence to reject H0. Show your work, and if you would reject H0.

The average age of NCAA competitors is 23 years old. The stu…

The average age of NCAA competitors is 23 years old. The study seeks to test if the average age of NCAA competitors is lower. A sample of NCAA competitors were randomly sampled, and the outcome of the sample average of NCAA competitors was 19. Assume a standard deviation of 2. Select the correct Null and Alternative Hypothesis.

Citrus greening disease has impacted Florida citrus trees by…

Citrus greening disease has impacted Florida citrus trees by reducing the average lifespan. A sample of 9,482 trees was taken, with a sample average lifespan of 10 years, resulting in rejection of H0 : μ = 30, with sufficient evidence to support a decrease.  What is the impact of such a decrease?