A psycho-linguist has been studying the frequency of text-speech (e.g., R U Ok?, LOL ) has been progressing into EMAIL correspondence. He collects a sample of 121 EMAIL messages and computes the mean (average) number of examples of text-speech per message. He also has a huge library of archived EMAIL messages from the year 2001. From these he is able to calculate the population average and standard deviation. Compute a inferential statistic to evaluate the hypothesis that the use of text-speech has increased in the years since 2001. Use an alpha level that would insure a maximum of a %5 risk of rejecting a true null hypothesis. These are the obtained values: Population Mean from 2001: 1.6 Population Standard deviation from 2001: 1.25 Sample mean from this year: 1.98 The appropriate statistics to use is a ___ test.
A psycho-linguist has been studying the frequency of text-speech (e.g., R U Ok?, LOL ) has been progressing into EMAIL correspondence. He collects a sample of 121 EMAIL messages and computes the mean (average) number of examples of text-speech per message. He also has a huge library of archived EMAIL messages from the year 2001. From these he is able to calculate the population average and standard deviation. Compute a
These are the obtained values:
Population Mean from 2001: 1.6
Population Standard deviation from 2001: 1.25
Sample mean from this year: 1.98
The appropriate statistics to use is a ___ test.
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