Other stats (Year 1)

Question 1

What do you assume with interlopation?

Answer 1

Data is evenly distributed within each class

Question 2

(…) of the data range is within one standard deviation

Answer 2

68%

Question 3

(…) of the data range is within two standard deviations

Answer 3

95%

Question 4

Standard deviation is the square root of the (…)

Answer 4

variance

Question 5

What is the mean affected by?

Answer 5

• multiplying/dividing
• adding/subtracting

Question 6

What is standard deviation affected by?

Answer 6

• multiplying/subtracting

Question 7

Each section in a box plot contains…

Answer 7

25% of the observations in the sample

Question 8

What are the requirements for histograms?

Answer 8

Grouped continuous data

Question 9

What is it called if all probabilities are the same?

Answer 9

Discrete uniform distribution

Question 10

What does the X represent in P(X=x)?

Answer 10

number of successful trials

Question 11

What are the n and p called in B(n,p)

Answer 11

n - number of trials (index)
p - probability of success (parameter)

Question 12

4

What are the requirements for a binomial distribution model

Answer 12

• there are a fixed number of trials, n
• there are two possible outcomes (success and failure)
• there is a fixed/constant probability of success, p
• the trials are independent of each other

Question 13

What is the test statistic?

Answer 13

The number/proportion of (heads we get from 8 tosses)