The hypothesis test result only tells us whether there is a significant difference between 2 populations or not. Calculate the exact standardized effect size using the provided information.

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The hypothesis test result only tells us whether there is a significant difference between 2 populations or not. Calculate the exact standardized effect size using the provided information.
According to the national statistics from 2009, the broadcast networks in American
averaged 13.50 minutes of commercials during a one-hour program. I was curious
whether the commercial time is significantly different now (2018) compared to 2009.
So I measured the commercial time during a one-hour period during prime time on 9
different networks and recorded the number of minutes. I assume that the
commercial time across all the broadcast networks in America is normally
distributed and I set the significance level at a = .05.
Transcribed Image Text:According to the national statistics from 2009, the broadcast networks in American averaged 13.50 minutes of commercials during a one-hour program. I was curious whether the commercial time is significantly different now (2018) compared to 2009. So I measured the commercial time during a one-hour period during prime time on 9 different networks and recorded the number of minutes. I assume that the commercial time across all the broadcast networks in America is normally distributed and I set the significance level at a = .05.
The comparison population is represented by the national statistics from 2009 with a population mean of 13.50
minutes of commercials during a one-hour program. The population standard deviation is not provided so it needs
to be estimated from the sample. The population mean is estimated with the sample mean. Use the sample data
below to calculate the sample mean (estimated population mean) and the estimated population standard deviation.
TV Network
1
2
3
4
5
6
7
8
9
Commercial
time per hour
13
13.5
15
14.25
14.5
14.25
13.25
16
16.75
Transcribed Image Text:The comparison population is represented by the national statistics from 2009 with a population mean of 13.50 minutes of commercials during a one-hour program. The population standard deviation is not provided so it needs to be estimated from the sample. The population mean is estimated with the sample mean. Use the sample data below to calculate the sample mean (estimated population mean) and the estimated population standard deviation. TV Network 1 2 3 4 5 6 7 8 9 Commercial time per hour 13 13.5 15 14.25 14.5 14.25 13.25 16 16.75
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