A customer service representative was interested in comparing the average time (in minutes) customers are placed on hold when calling Southern California Edison (SCE) and Southern California Gas (SCG) companies. The representative obtained two independent random samples and calculated the following summary information: SCE SCG Sample Size 9 12 Sample Mean 3.2 minutes 2.8 minutes Sample Standard Deviation 0.5 minutes 0.7 minutes Test whether there is a significant difference in average time a customer is on hold between the two companies, at the level of significance 0.1. Group of answer choices Since 0.1 < p-value < 0.2, one cannot conclude that there is a significant difference in mean time a customer is on hold between the two companies. Since 0.05 < p-value < 0.1, one cannot conclude that there is a significant difference in mean time a customer is on hold between the two companies. Since 0.1 < p-value < 0.2, one can conclude that there is a significant difference in mean time a customer is on hold between the two companies. Since 0.05 < p-value < 0.1, one can conclude that there is a significant difference in mean time a customer is on hold between the two companies.
A customer service representative was interested in comparing the average time (in minutes) customers are placed on hold when calling Southern California Edison (SCE) and Southern California Gas (SCG) companies. The representative obtained two independent random samples and calculated the following summary information: SCE SCG Sample Size 9 12 Sample Mean 3.2 minutes 2.8 minutes Sample Standard Deviation 0.5 minutes 0.7 minutes Test whether there is a significant difference in average time a customer is on hold between the two companies, at the level of significance 0.1. Group of answer choices Since 0.1 < p-value < 0.2, one cannot conclude that there is a significant difference in mean time a customer is on hold between the two companies. Since 0.05 < p-value < 0.1, one cannot conclude that there is a significant difference in mean time a customer is on hold between the two companies. Since 0.1 < p-value < 0.2, one can conclude that there is a significant difference in mean time a customer is on hold between the two companies. Since 0.05 < p-value < 0.1, one can conclude that there is a significant difference in mean time a customer is on hold between the two companies.
A customer service representative was interested in comparing the average time (in minutes) customers are placed on hold when calling Southern California Edison (SCE) and Southern California Gas (SCG) companies. The representative obtained two independent random samples and calculated the following summary information: SCE SCG Sample Size 9 12 Sample Mean 3.2 minutes 2.8 minutes Sample Standard Deviation 0.5 minutes 0.7 minutes Test whether there is a significant difference in average time a customer is on hold between the two companies, at the level of significance 0.1. Group of answer choices Since 0.1 < p-value < 0.2, one cannot conclude that there is a significant difference in mean time a customer is on hold between the two companies. Since 0.05 < p-value < 0.1, one cannot conclude that there is a significant difference in mean time a customer is on hold between the two companies. Since 0.1 < p-value < 0.2, one can conclude that there is a significant difference in mean time a customer is on hold between the two companies. Since 0.05 < p-value < 0.1, one can conclude that there is a significant difference in mean time a customer is on hold between the two companies.
A customer service representative was interested in comparing the average time (in minutes) customers are placed on hold when calling Southern California Edison (SCE) and Southern California Gas (SCG) companies. The representative obtained two independent random samples and calculated the following summary information:
SCE
SCG
Sample Size
9
12
Sample Mean
3.2 minutes
2.8 minutes
Sample Standard Deviation
0.5 minutes
0.7 minutes
Test whether there is a significant difference in average time a customer is on hold between the two companies, at the level of significance 0.1.
Group of answer choices
Since 0.1 < p-value < 0.2, one cannot conclude that there is a significant difference in mean time a customer is on hold between the two companies.
Since 0.05 < p-value < 0.1, one cannot conclude that there is a significant difference in mean time a customer is on hold between the two companies.
Since 0.1 < p-value < 0.2, one can conclude that there is a significant difference in mean time a customer is on hold between the two companies.
Since 0.05 < p-value < 0.1, one can conclude that there is a significant difference in mean time a customer is on hold between the two companies.
Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.
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