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In the cardiac lab, we added three different ions to the frog heart, Ca, Na and K. The effect of K on the heart is ___

What is happening in the time region as noted by A?

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Suppose that the average area of a barn is 144ft with a standard deviation of 12ft, and the average area of a trailer is 69ft with a standard deviation of 5ft. What is the standard deviation of the difference in average areas between the barn and the trailer?

62% of Amazon customers have a Prime account. For a market research study, Amazon selects 500 customers at random from their customer database and tests whether or not they have a Prime account. What is the standard error of the sampling distribution for the proportion of customers with a Prime account? Round your answer to at least three decimal places.

62% of Amazon customers have a Prime account. For a market research study, Amazon selects 500 customers at random from their customer database and tests whether or not they have a Prime account. What is the standard error of the sampling distribution for the proportion of customers with a Prime account? Round your answer to at least three decimal places.

Does your answer to 13d make sense, given the confidence interval calculated in 13a-b?  Why?

Does your answer to 13d make sense, given the confidence interval calculated in 13a-b?  Why?

Does your answer to 13d make sense, given the confidence interval calculated in 13a-b?  Why?

A pet food company claims their canned food contains 2.5oz of real chicken. Suppose we take a random sample of 250 cans of cat food from Walmart’s around the area to perform a hypothesis test and find a p-value of .02.  If we use the same sample to produce a 95% confidence interval, what would be true?