The estimated standard error (SM), provides a measure of the average discrepancy between: a score ( x ) and the population mean ( \( \mu \) ). a sample mean (M) and the population mean ( \( \mu \) ). the sample standard deviation ( s ) and the population standard deviation ( \( (\mathrm{O} \) ).

Find the standard deviation of \( x \), given that \( \Sigma 4 x^{2}=14600, \Sigma 2 x=420 \) and \( n=20 \).

For an experiment comparing more than two treatment conditions or more than two groups, you should use analysis of variance (ANOVA), rather than separate \( t \) tests. True False

The distribution of heights of 19 -year-old women is approximately normal, with a mean of 170 cm and a standard deviation of 5 cm . a What percentage of these women have heights: i between 155 and 185 cm ? ii greater than 180 cm ? iii between 160 and 175 cm ? b In a sample of 5000 of these women, approximately how many have heights greater than 175 cm ?

5 The distribution of resting pulse rates of a sample of 2000 20-year-old men is approximately normal, with a mean of 66 beats/minute and a standard deviation of 4 beats/minute. a What percentage of these men have pulse rates of: i higher than 66 ? ii between 66 and 70 ? iii between 62 and 74 ? b Approximately how many of this sample of 2000 men have pulse rates between 54 and 78 beats/minute?

Cite as características que um bom diagrama de dispersão deve ter para facilitar a interpretação dos dados.