Suppose that IQ scores have bell-shaped distribution with a mean of 95 and a standard deviation of 16 . Describe where approximately 99.75 of IQ scores lie, Answer \[ \text { below } 79 \text { and above } 111 \] Obelow 47 and above 143 Obetween 47 and 143 Obelow 63 and above 127

Classifying subjects on the basis of gender is an example of what kind of measurement scale? nominal. ordinal. interval. discrete. continuous.

Complete the statement below. point estimate confidence interval critical value the value of a statistic that estimates the value of a parameter. confidence level

Which of the following is/are part of descriptive statistics? central tendency. variability. linear regression. correlation. all of the above.

1. The blood pressure readings for executives are approximately normally distributed with a mean systolic blood pressure of 134 and a standard deviation of 20 . Given this information it can be concluded that: a about \( 68 \% \) of the executives have blood pressures between \( \square \) and \( \square \) b about \( 95 \% \) of the executives have blood pressures between \( \square \) and c about \( 99.7 \% \) of the executives have blood pressures between \( \square \) and d about \( 16 \% \) of the executives have blood pressures above \( \square \) e about \( 2.5 \% \) of the executives have blood pressures below \( \square \) f about \( 0.15 \% \) of the executives have blood pressures below \( \square \) g about \( 50 \% \) of the executives have blood pressures above \( \square \).

24. What is the \( y \)-intercept of the trend line equation, and what does it mean in the context of the situation?