Chest circumferences of adult males are known to follow a Normal distribution with mean 40 inches and standard deviation 2.1 inches. Suppose we collect a random sample of 66 adult males. What is the probability that the average chest circumference of this group will be exactly 39.98 inches?Give your answer to four decimal places. If the question cannot be answered with the information given, enter -1 as your answer.

In an all boys school, the heights of the student body are normally distributed with a mean of 67 inches and a standard deviation of 5 inches. What percentage of the students are between 59 and 80 inches tall, to the nearest tenth?Statistics Calculator

Suppose that head circumferences of adult men have a bell-shaped distribution with mean = 58 cm and standard deviation = 3 cm. (Use the Empirical Rule.)(a)What is the head circumference (in cm) such that only 2.5% of adult men have a smaller head circumference? cm(b)What is the head circumference (in cm) such that only 2.5% of adult men have a larger head circumference? cm(c)What is the head circumference (in cm) such that only 16% of adult men have a larger head circumference? cm

he heights of women in New Zealand are normally distributed, with a mean of 165 centimetres and a standard deviation of 10 centimetres.   A random sample of five women is selected. What is the probability that the sample mean is greater than 162 centimetres?

The mean performance score on a physical fitness test for Division I student-athletes is 947 with a standard deviation of 205. If you select a random sample of 60 of these students, what is the probability the mean is below 900? (Round z-value to 2 decimal places and final answer to 4 decimal places.)

The heights of men aged 18 to 24 are approximately normally distributed with mean 173cm and standard deviation 6.5cm. Only about 5% of young men have heights outside the rangeGroup of answer choices166.5cm 179.5cm160.0cm to 186cm153.5cm  to 192.5cm147cm to 199cm