Mathematics, 02.02.2020 17:05 rubixkube86

Me! and show work as well! soo confused!

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Mathematics, 21.06.2019 13:50, floverek

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Mathematics, 21.06.2019 21:40, ur4286

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

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Mathematics, 21.06.2019 22:10, carsondelane13

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

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Me! and show work as well! soo confused!
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