Stat Quiz

A chance variation in an observational process is:

The cholesterol content of chicken eggs is normally dist.with a mean of 200 mg and sd of 15 mg. Find P(bove 205 mg).

What is the probability of drawing a king or a club or both from a deck of cards?

7% of teachers suffer from fear of spiders. Find the probability that at least one of the 10 teachers suffer from fear?

Which of the following is a continuous variable?

A researcher takes a sample of 400 students from 10 colleges. The average age of all college students in California is

Which of the following statements about hypothesis tests is INCORRECT?

Find the probability of getting exactly 12 out of 30 questions on a true or false question.

If a distribution is abnormally tall and peaked, then it can be said that the distribution is:

The ratio scale measurement:

With mean=1,500, sd=300, 95% CI, if the margin of error is 25, at least how many individuals should you sample?

A committee of 5 people is to be formed from 10 women & 6 men. Find:probability that the committee has at least 3 women.

Find the probability of getting a prime number thrice by tossing a die 5 times.

All the following are statistical terms for the balance point or central value of a bell-shaped frequency curve except

a nominal scale variable is:

The science of statistics includes which of the following:

The P-value for a right-tailed test is P=0.042. Which of the following is INCORRECT?

10% are worth $1000, 20% ,$100, and 70%, $10. Find the expected winnings if you purchase a single ticket.

What is the number of permutations of the letters in the word BANANA?

What is the geometric mean of the following data: 1 6 8 9 12 13.

Using empirical rule, approximate the % of normally distributed data that lies within one s.d. of the mean.

In descriptive statistics our main objective is to:

Which of the following statements is true regarding a sample?

60% of pupils have access to the internet. 8 students is chosen. Find the probability that exactly 5 have access.

Which of the following statements is true regarding a population?

The P(A) is 0.7 and P(A & B) is 0.15. Given the event A, the probability of event B is

A man can make a profit of P500,000 with p=0.6 or take a loss of P200,000 with p=0.4. What is his expected gain?

The VitC of a supplement pill is normally distributed with mean 490 mg and sd of 12 mg. Find P(at least 500 mg of VitC).

A discrete variable is:

Census reports used as a source of data is:

The number of accidents in a city during 2020 is:

Outliers can produce problematic results. Rank the ff.in order or “least affected” to “most affected by outliers”.

The long-run average of a random variable is

Given 50 tickets in a lottery in w/c there is 1st & 2nd prizes. Find:probability of a man drawing a prize if he owns 5.

Ordinary scale of measurement:

What is the harmonic mean of the following data: 1 6 8 9 12 13.

A qualitative variable:

A parameter is a measure which is computed from

A man purchases a ticket,he can win 1st prize of P50k or 2nd prize, P20k with p=0.001 and 0.003.What is the fair price?

If the probability of getting a grade of A is 0.25 and a grade B is 0.30, then the probability of getting A or B is