According to a recent study of 7335 young people in the US, 30% had been arrested for a crime other than a traffic violation by the age of 23. crimes included such things as vandalism, underage drinking, drunken driving, shoplifting, and drug possession. From a study in USA Today, quoted in The Week, 2012; 11: 547-548.(a) Is the 30% a parameter or a statistic?(A) Parameter.(B) Statistic.(b) The margin of error for the population proportion estimate, P, is 0.01. use this information to give a range of plausible values for the parameter

a) Statistic.

b) The population proportion is expected to be between 0.29 and 0.31 with a 94% degree of confidence.

Step-by-step explanation:

a) The proportion of 30% is a statistic, as it is a value that summarizes data only from the sample taken in the study from USA Today. Other samples may yield different proportions.

b) We can use the statistic to estimate a confidence interval for the parameter of the population.

The standard error for the proportion is calculated as:

The margin of error is 0.01. We can use this value to determine the level of confidence that represents.

The formula for the margin of error is:

This z-value, according to the the standard normal distribution, corresponds to a confidence interval of 94%.

The interval for this margin of error is:

Then, we can conclude that the population proportion is expected to be between 0.29 and 0.31 with a 94% degree of confidence.

1

step-by-step explanation:

you are throwing one dart

step-by-step explanation:

mean or average is 40.6