The height of an adult man is normally distributed with mean 170 cm and sd 10 cm.

It is more likely to find a 25 men whose average height is less than 160cm vs finding a man whose height is greater than 180cm.

Do adult daughters have a greater income than their mothers (on average)? To investigate this question a sample of 50 pairs of mothers & daughters was selected. In this case the null hypothesis is: 

The height of an adult man is normally distributed with mean 170 cm and sd 10 cm.

It is more likely to find a man whose height is less than 160cm vs finding a man whose height is greater than 180cm.

Even though you failed to reject the null hypothesis, it may still be false.

Suppose we are conducting a one-sided HT for one mean with a sample of 30 individuals and 5% significance level. If a Type I error is committed, then the p-value was was

Suppose we are conducting a one-sided HT for one mean with a sample of 30 individuals and 5% significance level. If a Type II error is committed, then the p-value was was

A P-value of 0.04 is more significant evidence against the null hypothesis than a P-value of 0.08.

In hypothesis testing, it is never valid to form a conclusion of accepting the null hypothesis.

If the test statistic of a test for 1 mean equals 4.543 with sample size 33, then 

Do Millennials have on average a greater income than Baby Boomers? To investigate this question two SRS samples of 50 Millennials and 50 Baby Boomers were selected. In this case the null hypothesis is: