cis342 Flashcards

statistics

In England, a Leeds University researcher said that the local watering hole's welcoming atmosphere helps men get rid of the stresses of modem life and is vital for their psychological well-being. Author of the report, Dr. Colin Gill, said rather than complain, women should encourage men to "pop out for a swift half." "Pub-time allows men to bond with friends and colleagues," he said. "Me n need break-out time as much as women and are mentally healthier for it." Gill added that men might feel unfulfilled or empty if they had not been to the pub for a week. The report, commissioned by alcohol-free beer brand Kaliber, surveyed 900 men on their reasons for going to the pub. More than 40% said they went for the conversation, with relaxation and a friendly atmosphere being the other most common reasons. Only 1 in 10 listed alcohol as the overriding reason. Let's examine this news story from a statistical perspective.

Do you think the report that only 10% of respondents listed alcohol as an important reason for going to the pub might be a biased result? Why?

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calculus

Let $f(x)=x e^x$ . Use the limit definition to compute $f^{\prime}(0)$ , and find the equation of the tangent line at $x=0$ .

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finite math

Use formula (1) for simple interest to find each of the indicated quantities. $I=\$ 60 ; P=\$ 2,400 ; r=5 \% ; t=?$

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precalculus

Find an exact solution to each problem. If the solution is irrational, then find an approximate solution also. A juggler tosses a ball into the air with an initial velocity of $40 \mathrm{ft} / \mathrm{sec}$ from an initial height of $4 \mathrm{ft}$ . Find how long it takes for the ball to return to a height of $4 \mathrm{ft}$ . HINT The formula $S=-16 t^2+v_0 t+s_0$ gives the height $S$ in feet at time $t$ in seconds where $v_0$ is the initial velocity and $s_0$ is the initial height.

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cis342

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