Mathematics, 10.06.2020 07:57 daydallas01
Banking fees have received much attention during the recent economic recession as banks look for ways to recover from the crisis. A sample of 41 customers paid an average fee of $12.22 per month on their interest-bearing checking accounts. Assume the population standard deviation is $1.86. Complete parts a and b below.
a. Construct a 95% confidence interval to estimate the average fee for the population.
b. What is the margin of error for this interval?
Answers: 3
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Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!
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Mathematics, 21.06.2019 16:50, gesic2003
Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?
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Mathematics, 21.06.2019 17:40, samvgesite
Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9
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