When a sample size is decreased, the confidence interval for the mean is then ______.

A) narrowed
B) widened
C) more significant
D) less significant

How would you explain the concept of measurement to someone not in this class?

This distribution provides an illustration of a ______.

A) one-tailed null hypothesis
B) directional null hypothesis
C) directional alternative hypothesis
D) two-tailed alternative hypothesis

Suppose a group of consumers spends 30% of its disposable income on food, 20% on clothing, and 50% on rent. If over the course of a year the price of food rose 10%, the price of clothing dropped 5%, and rent rose 15%, what was the average price increase experienced by these consumers?

Write a model for the statement. I varies inversely as the $\text{ tenth power }$ of V

A) $I=\frac{k}{V}$
B) $I=\frac{1}{k+V^{10}}$
C) $I=\frac{k}{V^{10}}$
D) $I=k{V}^{10}$
E) $I=10\mathrm{kV}$

Nina's car exponentially depreciates at a rate of 7% per year.If Nina bought the car when it was 6 years old for $12,000,what was the original price of the car?