5. Find the area between z=-1.22 and z=+1.58.  Express your answer as a decimal. For example:    0.6255.

A survey is conducted to estimate the average age of students enrolled in a college.The population standard deviation is known to be 3.7 years. 42 students were interviewed and their average age was 22.4 years.For question 6, give the lowest value of the 90% confidence interval of the population mean (rounded to the tenths place).For question 7, refer back to this question and give the highest value of the 90% confidence interval (rounded to the tenths place) of the population mean. Note: the z-tables will be used for questions 6 and 7.

In order to be considered for admission to a famous and top-notch  computer school, candidates must score in the top 3% on a comprehensive test. This test has a mean score of 240 and a standard deviation of 31. Assuming the scores are normally distributed, find the lowest possible score necessary to be in the top 3% on this test. For question 24 give the Z-value you will use in your calculation. For question 25 give your actual calculated score.  

Give your answer your answer for Chi-squared left (see question 17 above).

Tornadoes are ranked in terms of wind speed and related property damage using the ________ scale.

Vertical zonation is particularly prominent in which region?

Hurricanes in Australia are known as

Changes in Earth’s elliptical orbit around the Sun is called

A thunderstorm is associated with ________ clouds.

Weather is defined as