Bookstores like education, because national data show that 71% of college graduates have read a book in the past year, compared to 54% of thegeneral population age 18 and over. the data also show the nationwide average educational level to be 13 years of schooling completed, with an sd of about 3 years, forpersons age 18 and over. a bookstore is doing a market survey in a certain county, and takes a simple random sample of 1,000 people age 18 and over. they find the averageeducational level to be 14 years, and the sd is 5 years. a. use a z - test to test for significance. what are z and p? b. compute the 68% -95%- and 99.7%-confidence intervals. c.can the difference in average educational level between the sample and the nation be explained by chance variation? if not, what other explanation can you give?

50x5=$250

step-by-step explanation:

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.

the above table 1 will calculate the population size (n) after a certain length of time (t). all you need to do is plug in the initial population number (no), the growth rate (r) and the length of time (t). the constant (e) is already entered into the equation. it stands for the base of the natural logarithms (approximately 2.71828). growth rate (r) and time (t) must be expressed in the same unit of time, such as years, days, hours or minutes. for humans, population growth rate is based on one year. if a population of people grew from 1000 to 1040 in one year, then the percent increase or annual growth rate is 40/1000 x 100 = 4 percent.

step-by-step explanation: