work please hep

14. The average l-ounce chocolate chip cookie contains 140 calories. A random sample of 14 different brands of chocolate chips cookies resulted in the following calorie counts. At the 0: =0.10 level, is there sufcient evidence that the average calorie content is greater than 140 calories? 15. In a New York modeling agency, a researcher wishes to see if the average height of female models is less than 67 inches, as the chief claims. A random sample of 20 models has an average height of 65.8 inches. The standard deviation of the sample is 2.7 inches. At a = 0.01, is the average height of the models really less than 67 inches? 16. A researcher claims that the mean age of the residents of a small town is more than 38 years old. The ages (in years) of a random sample of 30 residents is given below. At the alpha:(). 10, is there enough evidence to support the researcher's claim? Assume the population standard deviation is 9 years. sills-\":5- M 17. A nutrition bar manufacturer claims that the standard deviation of the number of grams of carbohydrates in a bar is 1.1] grams. A random sample of 26 bars has a standard deviation of 1.19 grams. At the alpha=0.05, is there enough evidence to reject the manufacturer's claim? Assume the population is normally distributed