1st midterm Flashcards
The outcome of 6th toss is heads?
A) It is (1/2)^6 =1/64
B) It is (1/2) +6 =1/12
C) It is 50%
D) Not enough data to tell
C) It is 50%
Choose the definition of frequency in statistics.
A)
B)
C) The frequency of an event is equal to the count of its occurrence in a series of observations.
D)
C) The frequency of an event is equal to the count of its occurence in a series of observations.
Which of the following is a measuring of spread?
A) Median
B) Mean
C) Mode
D) Range
D) Range
In meteorology, the intensity of UV-B radiation is classified as follows: weak, moderate, strong, very strong, extreme. What is the type of this data?
A) Discrete numerical
B) Categorial
C) Exponential
D) Not enough information to decide
B) Categorical
“A” and “B” are mutually exclusive events. The probability of event “A” is 0,31. What is the probability of event ‘B’?
A) Minimum 0,31
B) Not more than - 0,31
C) Maximum 0,69
D) Exactly 0,69
C) Maximum 0,69
Choose the right statement on type 2 error
A) The null hypothesis is accepted, although it is false.
B) Gives the error of wrong decision
C) The alternative hypothesis is accepted, although it is false.
A) The null hypothesis is accepted, although it is false.
What is the probability of a certain event?
A) 0
B) 1
C) Infinity
D) 0,5
B) 1
Choose the right statement
Choose the right statement.
A) The slope of the regression line cannot be more than one.
B)The slope of the regression line cannot be zero.
C) The slope of the regression line cannot be less than negative one.
D) The slope of the regression line can be any real number.
Pick the right statement. The value of variance …
… of the normal distribution is the same as the variance of Student’s t-distribution.
… is half the width of the range around the mean where the expected value can be found with ~ 95% confidence.
… is never negative.
… of theoretical distribution is estimated by the standard error.
Answer:
