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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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tudanglong tudanglong
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4 months ago
Use the following to answer the questions below:

A random sample of 48 students at a large university reported getting an average of 7 hours of sleep on weeknights, with standard deviation 1.62 hours. A dotplot of the data is provided.
A dotplot depicts the results of the average sleep on weeknights  for 48 students. The horizontal axis is labeled, Weeknight sleep and has markings from 4.0 to 9.6 in increments of 0.8. The dots are plotted as follows: 1 dot above 4.0, 4.4, 4.7, and 4.9; 2 dots above 5.2; 3 dots above 5.3, and 5.6; 1 dot above 5.7, 5.8, 5.9, and 6.0; 2 dots above 6.2, and 6.3; 1 dot above 6.4, and 6.5; 3 dots above 6.6; 1 dot above 6.8; 2 dots above 7.2; 1 dot above 7.3; 2 dots above 7.4; 1 dot above 7.5, 7.6, 7.9, 8.0, 8.1, 8.4, 8.5,  8.6, and 9.1; 2 dots above 9.2; 1 dot above 9.4, and 9.6; 2 dots above 9.7; 1 dot above 9.8, and 9.9. There are no dots above 4.8, and 8.8. All values are approximate.


Construct a 95% confidence interval for the average amount of weeknight sleep for students at this university. Round the margin of error to two decimal places.

▸ 6.48 to 7.52 hours

▸ 6.53 to 7.47 hours

▸ 6.54 to 7.46 hours

▸ 6.40 to 7.60 hours
Textbook 
Statistics: Unlocking the Power of Data

Statistics: Unlocking the Power of Data


Edition: 3rd
Authors:
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olskeeolskee
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tudanglong Author
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4 months ago
Brilliant ツ
big_larry_samp
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Thank you, thank you, thank you!
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