michaelponderjr2515
19.12.2020 •
Mathematics
How many weeks in a year...??
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Ответ:
52 is your answer
Step-by-step explanation: MERRY CHRISTMAS TO YOU!!!
Ответ:
Confidence level = 90%
mean = 71 beats per minute
standard deviation = 6 beats per minute
margin of error = z * δ / √n
where : δ - population of the standard deviation, n is the sample size ; z is the appropriate z value.
90% confidence level = 1.645 in z-value
margin of error = 1.645 * (6/√80) = 1.645 * (6/8.94) = 1.645 * 0.671 = 1.104