In a sample of 80 children, the mean age at which they first began to combine words was 16.51 months with a sample standard deviation of 9.59 months. Construct a 95% confidence interval for the mean age children begin to combine words.

Rearrange the formula c^2 = a^2 + b^2 for b

Me max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

Whit h equation best represents this situation the number 98 increased by an unknown number equal to 120