A normal distribution has mu = 30 and sigma = 5. (c)Find the raw score corresponding to z =-2.

Describe in words the surface whose equation is given. (assume that r is not negative.) $\theta =\frac{\pi }{4}$
a) The plane $y=-z$ where y is not negative
b) The plane $y=z$ where y and z are not negative
c) The plane $y=x$ where x and y are not negative
d) The plane $y=-x$ where y is not negative
e) The plane $x=z$ where x and y are not negative

Explain why t distributions tend to be flatter and more spread out than the normal distribution.

The manager of the store in the preceding exercise calculated the residual for each point in the scatterplot and made a dotplot of the residuals.
The distribution of residuals is roughly Normal with a mean of $0 and standard deviation of $22.92.
The middle 95% of residuals should be between which two values? Use this information to give an interval of plausible values for the weekly sales revenue if 5 linear feet are allocated to the stores

A flowerpot accidentally falls off the window of a condominium unit. Your unit is located below where the flowerpot had fallen. Your window measures to be 1.60 m tall, and the time it takes the flowerpot to move past your window is 0.150 s (from the top part to the bottom part of the window). How high from the top of your window did the flowerpot fell off?

a. Organize costs as an ordered array.
b. Construct the frequency distribution and percentage distribution for the given data.
c. Explain that the basketball game is concentrated around which class group.

Make a scatterplot of the data. Use 87 for 1987.

$\begin{array}{|cc|}\hline \text{ Year }& \text{ Sales }\\ & \text{ (millions of dollars) }\\ 1987& 300\\ 1988& 345\\ 1989& 397\\ 1990& 457\\ 1991& 510\\ 1992& 587\\ 1993& 664\\ 1994& 700\\ 1995& 770\\ 1996& 792\\ 1997& 830\\ 1998& 872\\ 1999& 915\\ \hline\end{array}$

P(n)=1 if n=0
${\displaystyle n\times \left[P(n-1)\right]}$ if n>0
P(6)=?