Chapter 9, Problem 9.5LB

Read measurements a-h on the enlarged 32nds and 64th graduated fractional rule shown in Figure 38-3.

what is the value of 0.495 from the z-table?

Suppose John has a torn tendon and is facing surgery to repair it. The surgeon explains the risks to John: infection occurs in 2% of operations, the repair fails in 12%of operations, and both infection and failure occur together in 1.28% of operations. What percentage, ?,of these operations succeed and are free from infection? Please round your answer to the nearest two decimal places. ?=

If Gena's score is 85, the class average is 82, and the SD is 4, what is Gena's Z-score?

Suppose the prevalence of "dance fever" at a college is 40% among women and 10% among men. If there are half as many men as women, what is the overall prevalence of dance fever at the college? What proportion of people without dance fever at that college are women?

if a person is dealt 13 cards from an ordinary deck of 52 playing cards several times, how many hearts per hand can he expect? between what two values would you expect the number of hearts to fall atleast 75% of the time?

Last year, 58% of butterflies in NC were monarchs.  We hypothesize that the proportion changed this year (Hint:  I said "changed", not greater or less than! Also, the word proportion is a hint on which test to use in your calculator). We do a study of 250 butterflies and 170 were monarchs.  Use an alpha = 0.05 Find the p-value.  Write it in standard form or as an exponent.

What percentage of scores is between a z of ‐2 and a z of +2? Why is this important?

A certain affects virus 0.4% of the population (in a population of 100,000 people, 400 will be infected with the virus). A test used to detect the virus in a person is positive 87% of the time if the person has the virus (true positive) and it is positive 14% of the time if the person does not have the virus (false positive). Fill in the remainder of the following table and use it to answer the questions below. Infected Not Infected Total Positive Test Negative Test Total 400 99,600 100,000