how do you do longhand

Test a claim that the mean amount of carbon monoxide in the air in U.S. cities is less than 2.32 parts per million. It was found that the mean amount of carbon monoxide in the air for the random sample of 64 cities is 2.39 parts per million and the standard deviation is 2.11 parts per million. At a: 0.31, can the claim be supported? Complete parts {a} through {e} below. Assume the population is normally distributed. {a} Identify the claim and state H1} and H3. Which of the following correctly states H1] and H3? Hr QED Ha: EEG [l'ype integers or decimals. Do not round} The claim is the I: hypothesis