1) A manufacturer claims that the average battery life of their product is 20 hours. A random sample of 25 batteries has an average life of 18 hours with a standard deviation of 3 hours. Is there evidence to suggest that the batteries' average life is significantly different from the claimed value at a 10% significance level?

Q: I also Need help with part D please

A: The correlation coefficient is 0.8137.

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Q: Evaluate the following integral:

A: Given,         ∫2416-25n2dn

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Q: e. lim f(1) f. lim f(r) 2 g. lim f(1)

A: e) -1+ is greater than -1, so we will take the second piece of the function

Q: Please this

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Q: Sample Count Sample Proportion Color Red 9. Brown Yellow 6. Green 10 Orange 12 Blue 9. Total 54…

A: Sample proportion for each color can be calculated as follows:

Q: Evaluate then simplify: Stan (4p) sec (4p)dp

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