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Chapter 13.8 Assume that, on average, healthy young adults dream 90 minutes each night, as inferred from a number of measures, including rapid eye movement (REM) sleep. An investigator wishes to determine whether drinking coffee just before going to sleep affects the amount of dream time. After drinking a standard amount of coffee, dream time is monitored for each of 28 healthy young adults in a random sample. Results show a sample mean, of 88 minutes and a sample standard deviation, s, of 9 minutes. Use t to test the null hypothesis at the .05 level of significance. If appropriate (because the null hypothesis has been rejected), construct a 95 percent confidence interval and interpret this interval<\/p>
<\/p>
Please show work<\/p>
<\/p>
a.<\/p>
<\/p>
b.<\/p>
<\/p>
Witte, R. & Witte, S. (2017). Statistics<\/em> (11th ed.). Wiley. ISBN-13: 9781119254515<\/p> <\/p>",
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