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

A population of values has a normal distribution with \( \mu=111.2 \) and \( \sigma=39 \). You intend to draw a random sample of size \( n=231 \). Please show your answers as numbers accurate to 4 decimal places. Find the probability that a single randomly selected value is between 109.1 and 116.8 . \( P(109.1<X<116.8)=\square \)

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?

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

The following data are the estimated market values (in millions of dollars) of 12 companies in the auto part business: \( 22,20,15,16,38,11,13,10,19,26,17,30 \) Round your answers in part (a) to 1 decimal place. (a) Calculate the values of \( Q_{1}, Q_{2}, Q_{3} \) \( Q_{1}=\square \) \( Q_{2}= \) \( Q_{3}= \)

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