Performance of stock screeners. Refer to the American Association of Individual Investors (AAII) statistics on stock screeners, Exercise $2.44$ (p. 71). Annualized percentage return on investment (as compared to the Standard & Poor's 500 Index) for 13 randomly selected stock screeners are reproduced in the table. Find the range of the data for the 13 stock screeners. Give the units of measurement for the range.

$9.0$	$-.1$	$-1.6$	$14.6$	$16.0$	$7.7$	$19.9$	$9.8$	$3.2$	$24.8$	$17.6$	$10.7$	$9.1$

Use my/o (muscle) to build words that mean:

twitching of a muscle _______

_____ is a type of muscle contraction that produces movement in a joint and allows the muscle to shorten.

Flynn Industries has outsourced the delivery of its products and now wants to develop a tool to help evaluate its transportation carriers. The table at the bottom of the page shows the rating values associated with different levels of price, quality, and delivery performance, as well as criteria weights that reflect the relative importance of these dimensions. To illustrate how the ratings work, suppose a carrier has a damage level of 0.82%. This would fall between 0.75% and 1.0%, thereby garnering a rating of 2. The second table shows actual average performance levels for three carriers.

a. Use the weighted-point evaluation system to calculate the weighted average performance for each carrier. Which carrier is best under this system?

b. How would the results change if the weights for price, quality, and delivery shifted to 0.6, 0.2, and 0.2, respectively?

c. Based on the results, should Flynn Industries single source or not? What might stop Flynn from single sourcing?

Sailmaster makes high-performance sails for competitive windsurfers. The following is information about the inputs and outputs for one model, the Windy $2000$ . Calculate the productivity in sales revenue/labor expense.

$$\begin{array}{ll} \hline\text { Units sold } & 1,217 \\ \text { Sale price each } & \$ 1,700 \\ \text { Total labor hours } & 46,672 \\ \text { Wage rate } & \$ 12 / \text { hour } \\ \text { Total materials } & \$ 60,000 \\ \text { Total energy } & \$ 4,000 \\ \hline \end{array}$$

Data giving the number of hours a person studied compared to his or her performance on an exam are given in the table:

$$\begin{array}{c|c} \text{Hours Studied} & \text{Exam Score} \\ x & y\\ \hline 0 & 50\\ 2 & 74\\ 4 & 85\\ 6 & 90\\ 8 & 92 \end{array}$$

(a) Find a least squares line of best fit to the above data. (b) What prediction would this line make for a student who studied 9 hours?

Why does ice float in water even though most solids sink in the pure liquid?

Find dy/dx.

y = ln |x squared - 1|

Body mass index measurements of adults are normally distributed with a mean of 26 and a standard deviation of 5 (based on the mentioned data set). Is a body mass index of 40 an outlier? Why or why not?

Why do red blood cells swell up and burst when placed in pure water?

A slab of glass that has an index of refraction of $1.50$ is submerged in water that has an index of refraction of $1.33$. Light in the water is incident on the glass. What is the angle of refraction if the angle of incidence is ) $45^{\circ}$?

Explain how you might use the resonance frequencies of an organ pipe to estimate the temperature of the air in the pipe.

Explain the difference between skeletal muscle, smooth muscle, and cardiac muscle.

Decide whether the underlined words in the following sentences are predicate nominatives, predicate adjectives, direct objects, or indirect objects. Above each underlined word, write PN for predicate nominative, PA for predicate adjective,* DO* for direct object, or IO for indirect object.

Example 1. After he gave $\underline{\text{her}}$ a rowing $\underline{\text{lesson}}$, he felt $\underline{\text{tired}}$.

The magician appeared $\underline{\text{nervous}}$ during the beginning of her performance.