Stats: Data and Models
5th Edition
ISBN: 9780135164013
Author: DeVeaux
Publisher: PEARSON CO
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Chapter 27, Problem 1E
To determine
Explain the difference between “big data” and ‘data’.
Expert Solution & Answer
Explanation of Solution
Data:
A data is set of existing factor, information, knowledge or observations which can be used for further study to predict something. It can be measure, analyzed and visualized using some analysis tools or graphs and images.
Big data:
Big data is a large set of data which vary over time.
The main difference between data and big data is that data can be cross sectional and time series, however big data is only time series data.
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For each of the time series, construct a line chart of the data and identify the characteristics of the time series (that is, random, stationary, trend, seasonal, or cyclical)
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1. A consumer group claims that the mean annual consumption of cheddar cheese by a person in
the United States is at most 10.3 pounds. A random sample of 100 people in the United States has
a mean annual cheddar cheese consumption of 9.9 pounds. Assume the population standard
deviation is 2.1 pounds. At a = 0.05, can you reject the claim? (Adapted from U.S. Department of
Agriculture)
State the hypotheses:
Calculate the test statistic:
Calculate the P-value:
Conclusion (reject or fail to reject Ho):
2. The CEO of a manufacturing facility claims that the mean workday of the company's assembly
line employees is less than 8.5 hours. A random sample of 25 of the company's assembly line
employees has a mean workday of 8.2 hours. Assume the population standard deviation is 0.5
hour and the population is normally distributed. At a = 0.01, test the CEO's claim.
State the hypotheses:
Calculate the test statistic:
Calculate the P-value:
Conclusion (reject or fail to reject Ho):
Statistics
21.
find the mean.
and
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Text
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Chapter 27 Solutions
Stats: Data and Models
Ch. 27.1 - Prob. 1JCCh. 27.1 - Prob. 2JCCh. 27.1 - Prob. 3JCCh. 27.1 - Prob. 4JCCh. 27.1 - Prob. 5JCCh. 27.2 - Prob. 6JCCh. 27.2 - Prob. 7JCCh. 27.2 - The bank vice president from the previous Just...Ch. 27.2 - The bank vice president from the previous Just...Ch. 27.2 - The bank vice president from the previous Just...
Ch. 27.3 - The vice president is interested in using a tree...Ch. 27.3 - The vice president is interested in using a tree...Ch. 27.3 - The vice president is interested in using a tree...Ch. 27.3 - Our vice president is back with a couple of...Ch. 27.3 - Our vice president is back with a couple of...Ch. 27.4 - And …
Which of the 1000 trees that the Random...Ch. 27.4 - Prob. 17JCCh. 27 - Prob. 1ECh. 27 - Prob. 2ECh. 27 - Prob. 3ECh. 27 - Is any one portion of the CRISP-DM more important...Ch. 27 - Prob. 5ECh. 27 - Prob. 6ECh. 27 - Prob. 7ECh. 27 - Prob. 8ECh. 27 - Prob. 9E
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