please help!

200 270 280 330 270 180 320 250 280 150 260 130 230 170 300 210 270 200 220 170 280 280 240 320 260 320 250 220 330 160 200 260 330 280 190 150 250 260 190 250 260 290 230 250 250 320 220 160 280 250 180 290 300 240 180 240 180 240 330 160 250 300 190 15 The margin of error for a 95% interval estimate ofthe mean nightly rate of all hotels in New York city is, a $11.36 b $13.37 c $15.73 d $ 18.50 16 The 95% interval estimate of the average nightly hotel rate is, a $206.18 $279.54- b $216.66 $269.06 c $224.14- $261.57 d $229.49 $256.23 17 The lower end of a 95% interval estimate ofthe mean annual salary of persons with an MBA degree ve years after graduation is reported to be $86,253. The interval is based on a sample of 150 persons. The sample standard deviation is $3,229. What is the point estimate of the salary? a $88,082 b $87,644 :3 $87,208 d $86,774- 18 In the previous question, what is the upper end of the interval? a $87,295 1) $88,177 C $89,067 61 $89,967