An oscilloscope shows a wave that starts a cycle at its minimum of 20 units and reaches a maximum of 100 units before completing a five millisecond cycle. Which represents the relationship between time, t, and the value of the wave function, F(t)?

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.