To construct: The 95% confidence interval for the population mean duration of American alligator dive.

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Answer 1

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Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8.2, Problem 78E

a.

To determine

To construct: The 95% confidence interval for the population mean duration of American alligator dive.

b.

To determine

To construct: The 99% confidence interval for the population mean duration of American alligator dive.

c.

To determine

To construct: The graph that illustrates the results in part (a) and part (b).

d.

To determine

To find: The confidence level that gives more accurate interval estimate of the population mean duration of American alligator dive μ.

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20 km, because GISS Worksheet 10 Jesse runs a small business selling and delivering mealie meal to the spaza shops. He charges a fixed rate of R80, 00 for delivery and then R15, 50 for each packet of mealle meal he delivers. The table below helps him to calculate what to charge his customers. 10 20 30 40 50 Packets of mealie meal (m) Total costs in Rands 80 235 390 545 700 855 (c) 10.1. Define the following terms: 10.1.1. Independent Variables 10.1.2. Dependent Variables 10.2. 10.3. 10.4. 10.5. Determine the independent and dependent variables. Are the variables in this scenario discrete or continuous values? Explain What shape do you expect the graph to be? Why? Draw a graph on the graph provided to represent the information in the table above. TOTAL COST OF PACKETS OF MEALIE MEAL 900 800 700 600 COST (R) 500 400 300 200 100 0 10 20 30 40 60 NUMBER OF PACKETS OF MEALIE MEAL

Let X be a random variable with support SX = {−3, 0.5, 3, −2.5, 3.5}. Part ofits probability mass function (PMF) is given bypX(−3) = 0.15, pX(−2.5) = 0.3, pX(3) = 0.2, pX(3.5) = 0.15.(a) Find pX(0.5).(b) Find the cumulative distribution function (CDF), FX(x), of X.1(c) Sketch the graph of FX(x).

Answer 2

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Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8.2, Problem 78E

a.

To determine

To construct: The 95% confidence interval for the population mean duration of American alligator dive.

b.

To determine

To construct: The 99% confidence interval for the population mean duration of American alligator dive.

c.

To determine

To construct: The graph that illustrates the results in part (a) and part (b).

d.

To determine

To find: The confidence level that gives more accurate interval estimate of the population mean duration of American alligator dive μ.

Expert Solution & Answer

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Check out a sample textbook solution

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Answer 3

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8.2, Problem 78E

a.

To determine

To construct: The 95% confidence interval for the population mean duration of American alligator dive.

b.

To determine

To construct: The 99% confidence interval for the population mean duration of American alligator dive.

c.

To determine

To construct: The graph that illustrates the results in part (a) and part (b).

d.

To determine

To find: The confidence level that gives more accurate interval estimate of the population mean duration of American alligator dive μ.

Expert Solution & Answer

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Check out a sample textbook solution

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Answer 4

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8.2, Problem 78E

a.

To determine

To construct: The 95% confidence interval for the population mean duration of American alligator dive.

b.

To determine

To construct: The 99% confidence interval for the population mean duration of American alligator dive.

c.

To determine

To construct: The graph that illustrates the results in part (a) and part (b).

d.

To determine

To find: The confidence level that gives more accurate interval estimate of the population mean duration of American alligator dive μ.

Expert Solution & Answer

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See solution

Answer 5

Chapter 8.2, Problem 78E

a.

To determine

To construct: The 95% confidence interval for the population mean duration of American alligator dive.

b.

To determine

To construct: The 99% confidence interval for the population mean duration of American alligator dive.

c.

To determine

To construct: The graph that illustrates the results in part (a) and part (b).

d.

To determine

To find: The confidence level that gives more accurate interval estimate of the population mean duration of American alligator dive μ.

Answer 6

Chapter 8.2, Problem 78E

a.

To determine

To construct: The 95% confidence interval for the population mean duration of American alligator dive.

Answer 7

Chapter 8.2, Problem 78E

a.

To determine

To construct: The 95% confidence interval for the population mean duration of American alligator dive.

Answer 8

b.

To determine

To construct: The 99% confidence interval for the population mean duration of American alligator dive.

Answer 9

b.

To determine

To construct: The 99% confidence interval for the population mean duration of American alligator dive.

Answer 10

c.

To determine

To construct: The graph that illustrates the results in part (a) and part (b).

Answer 11

c.

To determine

To construct: The graph that illustrates the results in part (a) and part (b).

Answer 12

d.

To determine

To find: The confidence level that gives more accurate interval estimate of the population mean duration of American alligator dive μ.

Answer 13

d.

To determine

To find: The confidence level that gives more accurate interval estimate of the population mean duration of American alligator dive μ.

Answer 14

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Answer 15

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Answer 16

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Answer 17

Ch. 8.1 - The value of a statistic used to estimate a...Ch. 8.1 - What is a confidence-interval estimate of a...Ch. 8.1 - Prob. 3E Ch. 8.1 - Prob. 4E Ch. 8.1 - Prob. 5E Ch. 8.1 - Suppose that you lake 500 simple random samples...Ch. 8.1 - Prob. 7E Ch. 8.1 - A simple random sample is taken from a population...Ch. 8.1 - Refer to Exercise 8.7 and find a point estimate...Ch. 8.1 - Prob. 10E

To construct: The 95% confidence interval for the population mean duration of American alligator dive.

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To construct: The 95% confidence interval for the population mean duration of American alligator dive.

To construct: The 99% confidence interval for the population mean duration of American alligator dive.

To construct: The graph that illustrates the results in part (a) and part (b).

To find: The confidence level that gives more accurate interval estimate of the population mean duration of American alligator dive μ.

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