Instruction 4-3 a Survey Is Taken Among Customers of Fast-Food Restaurants to Restaurants

question 30

Short Answer

Instruction 4-3
A survey is taken among customers of fast-food restaurants to determine preference for hamburgers or chicken.Of 200 respondents selected,75 were children and 125 were adults.120 preferred hamburgers and 80 preferred chicken.55 of the children preferred hamburgers.
-Referring to Instruction 4-3,the probability that a randomly selected individual is an adult or a child is ________.

---

Definitions:

Random Variable

A random variable is a variable whose values depend on outcomes of a random phenomenon.

Standard Normal Probability Distribution

A probability distribution that has a mean of 0 and a standard deviation of 1, used in statistics to represent standardized values of a dataset.

Z-statistic

A statistical measure that represents the number of standard deviations a data point is from the mean of a data set.

Probabilities

Measuring how likely it is for an event to occur, using a numeric scale that falls between 0 and 1.