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A group was tested for drugs. The table shows the results of the test along with actual drug use. Test Positive Test Negative Total Used Dugs 24 11 35 No Drug Use 18 123 141 Total 42 134 176 Let D = event “Used Drugs”, N = event “No Drug Use”, + be “Test positive”, and finally – be “Test negative”Round each answer to 4 decimal places. (D or +)= [a] (N and +) = [b] (N 

A rancher is interested in the average age that a cow begins producing milk. Match the vocabulary word with its corresponding example.  

A single card is drawn at random from a deck of 52 cards. Determine the following probabilities. Enter your final answes as reduced fractions or whole numbers.Note: Aces are not considered Face or Number cards. What is the probability the card drawn is an 8? [a] What is the probability the card drawn is a 2? [b] What is the probability that the card is an 8 and a 2? [c] What is the probability that the card is an 8 or a 2? [d] What is the probability the card drawn is a face card? [e] What is the probability the card drawn is a diamond? [f] What is the probability that the card is a face card and a diamond? [g] What is the probability that the card is a face card or a diamond? [h]

A company manufactures eyeglasses for different retailers. The number of days it takes to fix defects in an eyeglass and the probability that it will take that number of days are in the table. Number of days Probabilities 1 0.2489 2 0.1073 3 0.0914 4 0.1232 5 0.1332 6 0.1141 7 0.0694 8 0.0461 9 0.0187 10 0.0135 11 0.0104 12 0.0077 13 0.006 14 0.0045 15 0.0016 16 0.0021 17 0.0011 18 0.0008 The random variable is the number of days to fix the defect.Below is a histogram of the number of days to fix defects. the total area for all the rectangles added up is 1.   Find probability that it will take no more than 1 days to fix the defect.

Simplify the following radical: Use sqrt(x) for  and root(x)(y) for .

A company manufactures eyeglasses for different retailers. The number of days it takes to fix defects in an eyeglass and the probability that it will take that number of days are in the table. Number of days Probabilities 1 0.0013 2 0.0006 3 0.0023 4 0.0021 5 0.0041 6 0.0057 7 0.0081 8 0.01 9 0.0135 10 0.019 11 0.0457 12 0.0703 13 0.1144 14 0.1327 15 0.1233 16 0.0904 17 0.1079 18 0.2486                                 The random variable is the number of days to fix the defect.Below is a histogram of the number of days to fix defects. the total area for all the rectangles added up is 1. Find probability that it will take no more than 2 days to fix the defect.

Data was collected for 300 fish from the North Atlantic. The length of the fish (in cm) is summarized in the histogram below. What is the lower class limit for the fifth class? [a] What is the class width? [b] For the following question, type A, B, C, or D into the box. What is the distribution shape of the histogram? [c] A: Skewed-right B: Bell-shaped (or approximately bell-shaped) C: Uniform (or approximately uniform) D: Skewed-left

Lacy draws a diamond from a standard deck of 52 cards. Without replacing the first card, she then proceeds to draw a second card and gets a spade. Are these events independent? Type Yes or No: [a] Determine the probability of drawing a diamond and then a spade without replacement. Write your answer in decimal form, rounded to four decimal places as needed.  Answer= [b] Linda draws a diamond from a standard deck of 52 cards. She returns the diamond to the deck, then draws a second card. Her second card is a spade. Are these events independent? Type Yes or No: [c] Determine the probability of drawing a diamond and then a spade with replacement. Write your answer in decimal form, rounded to four decimal places as needed.  Answer= [d]

This question is extra credit.  I will grade it after you turn in the test. Let’s calculate the standard deviation by hand for the following set of sample data. 7     14     8     14     12 First, calculate the mean:

Lacy draws a heart from a standard deck of 52 cards. Without replacing the first card, she then proceeds to draw a second card and gets a club. Are these events independent? Type Yes or No: [a] Determine the probability of drawing a heart and then a club without replacement. Write your answer in decimal form, rounded to four decimal places as needed.  Answer= [b] Linda draws a heart from a standard deck of 52 cards. She returns the heart to the deck, then draws a second card. Her second card is a club. Are these events independent? Type Yes or No: [c] Determine the probability of drawing a heart and then a club with replacement. Write your answer in decimal form, rounded to four decimal places as needed.  Answer= [d]