What's the best way to resolve d,e,g,h

d) Find the mean of the sampling distribution of the sample mean. Put the numeric value in the first box and the correct units in the second box. years e) Find the standard deviation of the sampling distribution of the sample mean. Put the numeric value rounded to two decimal places in the first box and the correct units in the second box. years Online f) What is the shape of the sampling distribution of the sample mean? ccess normal or approximately normal v s Online Why? Check all that apply: ams o is known O o is unknown O population is not normal ams On is less than 30 On is at least 30 population is normal g) Find the probability that the sample mean lifetime of the 12 randomly selected dishwashers is less than 11.8 years. Round final answer to 4 decimal places. DO NOT use the rounded standard deviation from part e in this computation. Use the EXACT value of the standard deviation with the square root. h) Find the probability that the sample mean lifetime of the 12 randomly selected dishwashers is less than 11.3 years. Round final answer to 4 decimal places. DO NOT use the rounded standard deviation from part e in this computation. Use the EXACT value of the standard deviation with the square root