**WILL MEDAL/FAN
A study of five hundred adults found that the number of hours they spend on social networking sites each week is normally distributed with a mean of 14 hours. The population standard deviation is 3 hours. What is the margin of error for a 95% confidence interval?

0.134
0.220
0.263
0.313

Question

**WILL MEDAL/FAN
A study of five hundred adults found that the number of hours they spend on social networking sites each week is normally distributed with a mean of 14 hours. The population standard deviation is 3 hours. What is the margin of error for a 95% confidence interval? 
 	
	0.134
	0.220
	0.263
	0.313

anonymous · Answer

pls help
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anonymous · Answer

Crunchy Potato Chip Company has two different manufacturing plants. Company officials want to test whether each plant fills the bags with the same number of ounces. A random sample of potato chip bags from plant A had a mean of 24.2 ounces in each bag. A random sample from plant B had a mean of 22.2 ounces. They randomized the data over 100 trials and the difference of means for each trial is shown in the dot plot below. What can Crunchy Potato Chip Company conclude from this study? (1 point)


 	
	The difference is not significant because a difference of 2.0 is very likely.
	The difference is not significant because a difference of 2.0 is not very likely.
	The difference is significant because a difference of 2.0 is not very likely.
	The difference is significant because a difference of 2.0 is very likely.