Iyana Jackson
2022-09-14
Answered

What factors determine the value of $$\alpha $$ for three distributions?

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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 2021-02-25

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

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

asked 2022-02-23

What is the probability that exactly 3 heads will appear if a coin is tossed 4 times

asked 2021-05-18

Make a scatterplot for the data in each table. Use the scatter plot to identify and clustering or outliers in the data.
Value of Home Over Time
Number of Years Owned: 0, 3, 6, 9, 12, 15, 18, 21
Value (1,000s of $): 80, 84, 86, 88, 89, 117, 119, 86

asked 2022-02-23

Country Financial, a financial services company, uses surveys of adults age 18 and older to determine if personal financial fitness is changing over time. A recent sample of 1000 adults showed 410 indicating that their financial security was more than fair. Just a year before, a sample of 900 adults showed 315

indicating that their financial security was more than fair.

a. State the hypotheses that can be used to test for a significant difference between the

population proportions for the two years.

b. Conduct the hypothesis test and compute the p-value. At a .05 level of significance,

what is your conclusion?

c. What is the 95% confidence interval estimate of the difference between the two

population proportions? What is your conclusion?

asked 2021-06-05

Use the following Normal Distribution table to calculate the area under the Normal Curve (Shaded area in the Figure) when $Z=1.3$ and $H=0.05$ ;

Assume that you do not have vales of the area beyond$z=1.2$ in the table; i.e. you may need to use the extrapolation.

Check your calculated value and compare with the values in the table$[for\text{}z=1.3\text{}and\text{}H=0.05]$ .

Calculate your percentage of error in the estimation.

How do I solve this problem using extrapolation?

$\begin{array}{|ccc|}\hline Z+H& Prob.& Extrapolation\\ 1.20000& 0.38490& Differences\\ 1.21000& 0.38690& 0.00200\\ 1.22000& 0.38880& 0.00190\\ 1.23000& 0.39070& 0.00190\\ 1.24000& 0.39250& 0.00180\\ 1.25000& 0.39440& 0.00190\\ 1.26000& 0.39620& 0.00180\\ 1.27000& 0.39800& 0.00180\\ 1.28000& 0.39970& 0.00170\\ 1.29000& 0.40150& 0.00180\\ 1.30000& 0.40320& 0.00170\\ 1.31000& 0.40490& 0.00170\\ 1.32000& 0.40660& 0.00170\\ 1.33000& 0.40830& 0.00170\\ 1.34000& 0.41010& 0.00180\\ 1.35000& 0.41190& 0.00180\\ \hline\end{array}$

Assume that you do not have vales of the area beyond

Check your calculated value and compare with the values in the table

Calculate your percentage of error in the estimation.

How do I solve this problem using extrapolation?