Question: A NASA scientist claims that the mean mass of grains of sand is greater or equal to 550mcg. The mean mass of 56 rocks randomly chosen grains of beach sand is 533mcg with a standard deviation of 104.8mcg.

a. Write down the null and alternative Hypothesis associated with the claim

b. Calculate the p-value associated with the hypothesis.

c. Assuming a significance level of 0.05, what do you conclude?