10.13 Quizziz

At a particular college, 78% of all students are receiving some kind of financial aid.The school newspaper selects a random sample of 100 students and 72% of the respondents say they are receiving some sort of financial aid. Which of the following is true?

•  78% is a population and 72% is a sample.
• 72% is a population and 78% is a sample
• 78% is a parameter and 72% is a statistic
• 72% is a parameter and 78% is a statistic

These symbols represent the mean and standard deviation for which of the following distributions?

• The Population
• The Sample
• The Sampling Distribution

These symbols represent the mean and standard deviation for which of the following distributions?

• The Population

• The Sample

• The Sampling Distribution

These symbols represent the mean and standard deviation for which of the following distributions?

• The Population

• The Sample

• The Sampling Distribution

A sample is taken of 200 people. The number of people who own a dog was 80.
What is the sample proportion?

• 80
• 0.8
• 0.4
• 35%

The normal approximation of a binomial can be used if

• n ≥ 30
• p ≥ 30
• np ≥ 5 or n(1-p) ≥ 5

• np ≥  10 and n(1-p) ≥ 10

The distribution of weights of African bush elephants is skewed to the right with a mean of 6.42 tons and standard deviation of 1.07 tons. Let the random variable W represent the weight, in tons, of a randomly selected elephant. The weight is converted to kilograms using the formula Y = 900W. Which of the following best describes the distribution of Y?

• Roughly symmetric with mean 5,778 kilograms and standard deviation 1.07 kilograms

• Roughly symmetric with mean 5,778 kilograms and standard deviation 963 kilograms

• Skewed to the right with mean 906.42 kilograms and standard deviation 1.07 kilograms

• Skewed to the right with mean 5,778 kilograms and standard deviation 1.07 kilograms

• Skewed to the right with mean 5,778 kilograms and standard deviation 963 kilograms