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STAT 1400 Lab 7: Confidence Intervals Name: Kailee Moore Problem 3: Find the Sample Size A researcher wishes to be 95% confident that her estimate of the true proportion of individuals who travel overseas is within 4% of the true proportion. If there is no preliminary estimate available, how large should the sample be?

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Q3 Projection 3 Points Find the orthogonal projection of the vector $x = \begin{bmatrix} 1 \\ 1 \end{bmatrix}$ onto the vector $y = \begin{bmatrix} 1 \\ 2 \end{bmatrix}$ Hint: The result should be a vector that is in the same direction as y but with a different magnitude. Note: these vectors are not unit vectors and so you will have to amend slightly the equation from the video. The following definition will be useful for your derivation, it will also help you to draw a picture $x^T y = ||x|| ||y|| \cos(\theta)$ where $\theta$ is the angle between the vectors and the magnitudes are given by $||x|| = \sqrt{x^T x}$

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An increased risk of suicide when first taking an antidepressant drug may be due to

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Which of the following is FALSE about formatting, according to MCOM Ch 5Links to an external site.? Which of the following is FALSE about formatting, according to MCOM Ch 5Links to an external site.? Visual rhetoric means getting your message across in a non-text-based way. Audiences often scan your message before determining whether to read it. A "brain friendly" document has basic formatting. Fonts communicate communicate personality not credibility. Your first language is visual (unless you were born with a vision impairment).

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a) How far apart is 12 and -8 ? a) How far apart is 12 and -8?

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Find how much money needs to be deposited now into an account to obtain $8,300 (Future Value) in 14 years if the interest rate is 4% per year compounded continuously

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When going from 1 to 2 physician visits per year, the consumer's marginal utility

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Evaluate the indefinite integral given below.\\ $\int \frac{x^7}{\sqrt{x^4 - 2}} dx$\\ Sorry, that's incorrect. Try again?\\ $\int \frac{x^7}{\sqrt{x^4 - 2}} dx = $

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The Payday loan Company lends you $500. After 2 weeks you pay back $520. What is the simple interest rate? Note that the time is a fraction of a year

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Circulatory System 13 14 11 17 18 21 20 19 12 10 7 8 6 5 2 3 4 16 22 23 9 15

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