According to a Survey of American Households, the Probability That

question 96

Multiple Choice

According to a survey of American households, the probability that the residents own 2 cars if annual household income is over $25,000 is 80%. Of the households surveyed, 60% had incomes over $25,000 and 70% had 2 cars. What is the probability that the residents of a household own 2 cars and have an income less than or equal to $25,000 a year?

• A) 0.22
• B) 0.48
• C) 0.12
• D) 0.18

---

Definitions:

Type I Error

The incorrect rejection of a true null hypothesis, also known as a "false positive" in statistical testing.

Measurement Error

Refers to the difference between the true value of a measurement and the recorded value due to various factors such as instrument error or human error.

T-tests

Statistical tests used to compare the means of two groups and determine if they are significantly different from each other.

Statistically Different

Being statistically different means that observed differences between groups or variables in a study are unlikely to have occurred by chance, according to statistical analysis. This distinction supports the idea that the observed effects reflect true differences in the populations being studied.