A simple random sample of 30 items resulted in a sample mean of 10. The population standard deviation is o = 5. Round your answers to two decimal places.
a. What is the standard error of the mean, oi?
11
b. At 95% confidence, what is the margin of error?

The skating rink rented 872 pairs of skates during april and may.why? : if the skating rink rented three times the pair of skates in april during may, they rented 654 skates. 218 x 3 = 654then, if they want to know how many they rented during both april and may, then you just add 654 (may) and 218 (april) to give you 872 pairs of skates for both months.654 + 218 = 872hope this !

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