İSTATİSTİK I

4 | 1123334

4 | 679

5 | 112222

5 | 6689

6 | 0222334

Frequency

50 up to 100

10

100 up to 150

15

150 up to 200

18

200 up to 250

14

250 up to 300

9

Total

66

The spread of data values in statistics is called -------.

Which of the following completes the sentence above?

In an investigation, a continuous variable is measured for 40 observations. Among the measurements, the largest value is 85 and the smallest value is 23.

According to the information above, what is the range of the sample data?

4, 6, 8, 2, 1

(Use the arithmetic mean as 4.2 in your
calculations)

What is the sample variance of the data set above?

In an investigation, variance of a continuous variable is calculated as 58.

According to this, what is the standard deviation of the continuous variable?

Suppose a fair die is rolled. What is
S = {1,2,3,4,5,6} called in probability for this situation?

The union of two events A and B will be denoted by ------

Which of the following completes the sentence above?

According to classical probability approach, if a single fair die is thrown what is the probability of observing number 6?

In a probability problem P(A  B) = 0.47 and P(B) is 0.78, what is the probability of A knowing that event B has occurred?

4

8

12

16

P(X=x)

0.20

0.25

0.30

0.25

A discrete variable follows a Binomial distribution. If n=40 and p=0.67,

What is the standard deviation of this Binomial distribution?

In which discrete probability distribution both the arithmetic mean and the variance of the variable is equal to each other?

In a box, there are 60 yellow balls and 40 red balls. Suppose four balls are selected randomly without replacement.

What is the probability that all four balls are red?

In order to calculate the area under probability function between two points what is needed?

In an investigation the values of 40 observations for a continuous variable are measured. In this data, if E(X²) = 5150 and [E(X)]² = 4845

According to the information above, what is the standard deviation of this continuous variable above?

In a shopping centre service time for customers uniformly distributed between 5 and 29 minutes.

What the probability that the service time will take less than 8 minutes in this shopping centre?

If the variable that is the interest of the investigation follows a perfect normal distribution then -------% of the observation will lie 1σ of the arithmetic mean.

Which of the following completes the sentence above?

What type of data is “blood pressure”?

In what kind of study, researchers simply collect data based on what is seen and heard and infer based on the data collected?