State the empirical rule for variables.

Rui Baldwin
2021-02-08
Answered

State the empirical rule for variables.

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asked 2021-05-03

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

a) The plane

b) The plane

c) The plane

d) The plane

e) The plane

asked 2021-02-27

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

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

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

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In each of the following situations, which of the two distributions would be more spread out? Standard normal distribution or t-distribution with df = 10. t-distribution with df = 5 or t-distribution with df = 25. t-distribution with df = 100 or normal distribution with standard deviation = 100.

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At a certain college, 6% of all students come from outside the United States. Incoming students there are assigned at random to freshman dorms, where students live in residential clusters of 40 freshmen sharing a common lounge area. How many international students would you expect to find in a typical cluster? With what standard deviation?

asked 2022-04-19

s= 2.36 n= 350 confidence level 99%