The quantities of laborers in thousands. in the U.S. labor force in 2004 are appeared in the following table.

Age (in years) Men Women Total 16 to 24 11,673 10,595 22,268 25 to 44 37,337 31,028 68,365 45 to 64 27,182 24,589 51,771 65 and Older 2,787 2,211 4,998 Total 78,979 68,423 147,402

Source: U.S. Department of Labor Statistics.

Answer the accompanying inquiries dependent on the data given in the previous table. a What is the likelihood that an arbitrarily chosen laborer is a male who is at any rate 65 years old? b What is the likelihood that a haphazardly chosen specialist is a female? c What is the likelihood that a haphazardly chosen laborer somewhere in the range of 16 and 24 years of age is a male?

d What is the likelihood that an arbitrarily chosen female specialist is somewhere in the range of 25 and 64 years old?

Question 18

A buying office is to dole out an agreement for copier paper and another agreement for DVD+RWs to any of three firms offering for these agreements. (Any one firm could get the two agreements.) Find the probabilities of the accompanying occasions.

a Firm I gets the two agreements. b Firm I got an agreement, given that the two agreements don't go to a similar firm. c Firm I gets the agreement for paper, given that it doesn't get the agreement for the DVD+RWs. d What suppositions have you made?

Question 19

Kids and grown-ups with sore throats are regularly tried for strep throat. In the event that untreated, strep throat can prompt rheumatic fever. The customary strategy for surveying whether somebody has strep throat is a culture. Since the aftereffects of the way of life require a day to acquire, more fast tests are frequently utilized. The Biostat An Optical Immunoassay (Strep A 01A), first created in the mid 1990s, is one of the quick tests. Heiter and Bourbeau (1995) directed an examination in which the consequences of both the way of life and Strep A 01A were acquired for 801 patients who conceivably had strep throat. The outcomes are in the accompanying table.

Number of Results

Genuine False True False Test Positive Negative

Culture 239 7 555 0 Strep An OIA 225 21 526 29

Answer the accompanying inquiries dependent on the data given in the first table. a What is the affectability of the way of life? b What is the particularity of the way of life? c What is the prescient worth of the way of life?

Question 20

An overview is to be taken, and one of the inquiries to be posed is, "Have you at any point smoked pot?" If the respondent has smoked maryjane, she might be worried that an honest reaction would prompt arraignment and subsequently react "no," prompting a wrong gauge of the extent in the populace who has smoked cannabis. The randomized reaction configuration was created to give better data to such inquiries. Here the respondent might be told to flip a coin, not permitting the questioner to see the result. On the off chance that the coin lands with the "head up, the respondent is to react "yes"; in any case, the respondent answers the inquiry honestly (when the coin lands with the/air side up). Leave p alone the extent of individuals in the populace who have smoked maryjane, and assume that 0.7 individuals react "yes? What extent of the populace would be assessed to have smoked maryjane?