Business, 13.12.2019 21:31 reggienald3095

Marketing companies have collected data implying that teenage girls use more ring tones on their cellular phones than teenage boys do. in one particular study of 40 randomly chosen teenage girls and boys (20 of each) with cellular phones, the mean number of ring tones for the girls was 3.5 with a standard deviation of 1.7. the mean for the boys was 1.7 with a standard deviation of 0.9. conduct a hypothesis test at the 5% level to determine if the means are approximately the same or if the girls' mean is higher than the boys' mean.

1. state the distribution to use for the test.
2. what is the test statistic?
3. what is the p-value?
4. sketch a picture of this situation. label and scale the horizontal axis and shade the region(s) corresponding to the p-value.
5. decision:

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