# H7 - I did this already for my own sample and found a mean...

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BIOL2300-001 Name:___________________________ Homework #7 Due: Friday, November 13, 2009 ID:____________________________ On Monday, November 9, 2009 there will be no formal class. Instead, use this time to find ten (10) acorns on the UTA campus (or anywhere else where they are abundant). I prefer that the acorns come from a Live Oak tree (very common), but if you are unsure, don’t worry about it. Just make sure that all of your acorns are all the same kind. Measure your ten acorns to the nearest 0.1 cm using a simple ruler and record your data. Please only use acorns that do not have a cap (those are the ones you’ll find on the ground). Be mindful of angry squirrels and take precautions if necessary. Calculate the mean size and standard deviation for your sample. Then calculate the standard error.
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Unformatted text preview: I did this already for my own sample and found a mean of 2.2 cm with a standard deviation of 0.079 cm and a standard error of 0.025 cm. Use the confidence interval approach to test the null hypothesis that your sample of acorns is no different in size than my sample of acorns. Remember, this approach requires you to use the formula: 95% CI = ) ( 025 . 2 1 2 1 ) ( y y SE t y y . If zero is included in your calculated interval, then you must accept the null hypothesis ( H o ). If zero is not included in your calculated interval, then you can reject the null hypothesis with only a 5% probability of doing so in error. Please state whether you accept or reject the null hypothesis and show why. Show all work on this sheet (using the front and back)....
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