STAT. MID TERM. TERMS CHAPTERS 6-9

he larger the sample size, the LARGER / SMALLER the standard deviation of 𝑝𝑝̂

• SMALLER

• LARGER

The LARGER / SMALLER the sample size, the better the normal approximation to the sampling distribution of p̂

• LARGER

• SMALLER

1) Let p̂ be the estimate of the proportion p based on a simple random sample of size n drawn from a
population. Does the variability of p̂ increase or decrease as n increases? ______

2) Is p̂ a parameter? ___________

• Increases/ yes

• decreases/ yes

• Increases/ no

• decreases/ no

All Samsung TV’s sold in California

• PARAMETER

• STATISTIC

• POPULATION

• SAMPLE

The average price of all Samsung TV’s sold in California

• PARAMETER

• STATISTIC

• POPULATION

• SAMPLE

The percentage of all Samsung TV’s sold in California that are defective

• PARAMETER

• STATISTIC

• POPULATION

• SAMPLE

The mean price of 200 randomly selected Samsung TV’s sold in California

• PARAMETER

• STATISTIC

• POPULATION

• SAMPLE

500 randomly selected Samsung TV’s in California (to be used for further studies about their performance)

• PARAMETER

• STATISTIC

• POPULATION

• SAMPLE

The percentage of cars that are red in a random sample of 2000 cars in Florida

• PARAMETER

• STATISTIC

• POPULATION

• SAMPLE

n general, increasing the sample size n makes the confidence interval WIDER/ NARROWER

• Wider

• Narrower