Statıstıcs I (ENG)
Deneme Sınavı Soruları
- 20 soru
- Cevap anahtarı açık: çöz, sonucunu gör
- 1
What is mean score?
- 2
Which one below is NOT one of the differences between continuous and discrete random variables?
- 3
Consider the random experiment of tossing a fair coin until a tail (T) and a head (H) show up once. Describe the sample space of this random experiment ?
- 4
I. The standard normal curve is symmetric around the mean μ = 0.
II. The standard normal distribution has a standard deviation σ = 1 of the distribution.
III. The area under the standard normal distribution function for P (z ≤ 4.25) is exactly 1.
Which of the given statements can be said to be true about the standard normal distribution function?
- 5
The frequency distribution table of the students’ performance scores of a school were constructed as follows. What is the sample standard deviation of the data?
- 6
A support centre receives 8 calls per hour and the number of the calls follows the Poisson distribution.
Which of the following is the probability exactly 6 calls in an hour?
- 7
Which of the following information cannot be obtained from a box plot?
- 8
What must be the value of "a" if the table above is the probability distribution of variable X whose mean is 2.8?
- 9
Probability density function for continuous random variable X is defined as follows;
f(x) = 0.02, for 0 ≤ x ≤ 50
Which of the following mean of the continuous random variable X?
- 10
Which of the following is a feature of Bayes’ Theorem?
I.Using Bayes’ Theorem, we can find the probability that a defective item is produced by a particular machine.
II.It enables us to compute a particular conditional probability.
III. It is defined as the arrangements of a finite number of distinct objects.
- 11
Find out the range in the following data set: 10,15,20,25,30,35,40,45,50,55,60
- 12
Which of the followings is not true about normal distribution?
- 13
Which of the following is the most important and widely used measure of variability in statistics?
- 14
I. Most frequent value(s) is the arithmetic mean
II. Middle number in ordered data by magnitude is the median
III. Average number of values is the mode
Which of the definitions about central tendency measures is true?
- 15
The above table contains the daily sales data of a market. We want to construct grouped frequency distribution table for the data. What is the class width of the data?
- 16
What type of variable is your answer to a job offer?
- 17
- Data set is large
- Measurements type is ratio scale
- Interpretation should be easier
In which condition(s) above, it is more appropriate to use grouped frequency for summarizing data?
- 18
"Comparing the prices of a basket of products over time" is an example of .....?
- 19"It is almost the easiest of the graphs. It can be drawn by hand easily while collecting data. It will be very useful when the number of objects in our study is rather small such as up to 50 observations. It is generally used to investigate univariate (quantitative) data, but sometimes it is used to compare two variables. Essentially it is a one-dimensional scatterplot of observed values of a variable." Which type of graphic is described in the paragraph above?
- 20
Which of the following is not true for dot plots?