Statıstıcs I Final 6. Deneme Sınavı

Which level of measurement is not suitable for Median

Which class interval is containing the median?

Which of the followings are not correct related to probability density function?

The above table contains the daily sales data of a market. We want to construct relative frequency distribution table for the data. What is the first class’ relative frequency?

Which statements below are correct?

I Exponential distribution is a type of a discrete random variable.

II Discrete random variables have only a countable number of distinct values.

III A discrete random variable typically comprises of a counting concept.

IV Continuous random variables represent entire infinite values in an interval.

V Continuous random variables are commonly measured instead of counted.

Which of the following is the standard deviation of the given data above?

Which of the following is a measure of the midpoint or center of the probability distribution?

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?

Assume that 20 percent of Statistics course students in Anadolu University take Music course, 10 percent take Swimming course, and 4 percent take both Music and Swimming courses. What percentage of Statistics students neither take Music nor Swimming course?

If one wants to model the number of customers entering to a fast food restaurant per hour, which probability distribution should he/she use?

Which one is frequently used to summarize the features of probability distributions for a discrete random variable X?

The probability of an event A is 0.6, the probability of an event B is 0.3. The probability that neither A nor B occurs is 0.25. What is the probability that both A and B occurs?

Which of the followings is the most important and widely used measure of variability in statistics ?

Which one is a widely employed discrete probability distribution in statistics where a set of independent observations constitutes exactly two disjoint outcomes of a trial?

The box plot is given above shows the data about the number of hours spent on watching tv a day by students in a school.

Which of the following is not correct about the box plot data?

Let's assume that three perfect coins are flipped three times, what is the probability that all the results are head?

A manager of a café in a university campus assesses its customers as student, academic staff or visitor. She estimates that of all its customers 50% are students, 30% are academic staff and that 20% are visitors. It is known that purchases are made by 70% of student customers, by 60% of academic staff and by 30% of visitors. If a randomly chosen customer makes a purchase, what is the probability that this customer is a student?

A company works with two supplier firms for the same raw material. The first firm's late delivery probability on a given day is 0.05, whereas for the second firm this probability is 0.07. In addition, both firms' late delivery probability on given day is 0.04. What is the late delivery probability of at least one of the firms to company on given day?