a) Is the mean temperature for the last 25 (1988-2013) years higher or lower than that of the entire period for NYC? Calculate the z-score for the recent mean temperature using the mean and standard deviation for the entire period found in question 2. Round your answer to two decimal places. The mean temperature for the last 25 years higher than that of the entire period The mean temperature for the last 25 years lower than that of the entire period Z-score = What does the value of the z-score tell you about the difference between the two means? b) For what percentage of the last 25 years was the annual temperature above the historical mean temperature from 1869-present? c) Again for NYC, Of the 10 warmest years in recorded history (entire perid), how many occurred within the most recent 25 years (1988 - 2013) ? Of the 10 coldest years in recorded history (entire period), how many occurred within the last 25 years (1988 - 2013)? Do you find this result surprising? Why or why not