One sample of n=15 students spent one hour studying material from an e-book and then were tested on the material; their mean is  = 79 with  = 25.  A second sample of n=15 students spent one hour studying the same material from a hard copy of the text, and then earned a mean of = 83 with  = 23.  Run a two-tailed hypothesis test with alpha = .05.   Write the alternative hypothesis.     Write the null hypothesis.     With α=.05, what is tcrit?       Compute tobt         What should the researcher conclude?

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One sample of n=15 students spent one hour studying material from an e-book and then were tested on the material; their mean is  = 79 with  = 25.  A second sample of n=15 students spent one hour studying the same material from a hard copy of the text, and then earned a mean of = 83 with  = 23.  Run a two-tailed hypothesis test with alpha = .05.

 

Write the alternative hypothesis.

 

 

Write the null hypothesis.

 

 

With α=.05, what is tcrit?

 

 

 

Compute tobt

 

 

 

 

What should the researcher conclude? 

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