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Trial of Probability and Statistics Flashcards | StudBud
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Trial of Probability and Statistics
Trial of Probability and Statistics
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Answers
1
These are the prices of 10 books. What is the mean/averarge?
$9.6
$9.8
$9.7
$9.9
2
The probability of getting a sum of a prime number in a two-dice tossing is...
\frac{5}{12}
\frac{7}{18}
\frac{5}{18}
\frac{7}{12}
3
A coin is tossed 88 times, and the head side occurs 45 times. The coin is fair.
True
False
4
Which of these data is discrete?
Number of vehicles on the road
Color of a bicycle
Weight of an apple
Time taken to finish a circuit
5
Which of the following is not a strategy to collect a sample easily?
Observe the traffic from various districts of your town
Observe the nearest plants to your house
Only ask your few best friends for an opinion
Ask the first 5 people we meet about their interest
6
These are the prices of 10 books. What is the range?
$9
$8
$10
$11
7
Look at this back-to-back stem-and-leaf diagram. What is the median of class B?
73
75
74
79
8
Which of the statements is true about the back-to-back stem-and-leaf diagram?
Before exercise, everybody's pulse rate is not higher than 100 bpm
People tend to have higher pulse rate before exercise
After exercise, everybody's pulse rate is at least 80 bpm
After exercise, someone has a pulse rate of 88 bpm
9
If one marble is taken at random, the probability of getting a red or blue marble is...
\frac{5}{9}
\frac{7}{9}
\frac{2}{3}
\frac{1}{3}
10
The following question is written in an image. Pay attention carefully!
0.07
0.68
0.39
0.93
11
What is the angle for the sector "rainy"?
74\degree
72\degree
76\degree
78\degree
12
Why should you use the sample of a data source instead of the entire population?
The sample is too small
The population is too large
The sample is too large
The population is too small
13
What is wrong about this pie chart?
There are too few groups, only 3
The percentages do not add up to 100%
The sector sizes are not proportional to the percentages
It is not clear which sector belongs to which group
14
Look at this grouped data! What is the estimate of mean?
47.5
47.8
47.6
47.7
15
Which of these data is categorical?
Amount of water in a bottle
Exam score
Number of students
Candy flavor
16
If there are 365 days in year 2023, how many days during the year is rainy?
74 days
72 days
73 days
71 days
17
Look at this back-to-back stem-and-leaf diagram. What is the range of class A?
36
38
37
35
18
The probability of getting a sum of a multiple of 3 in a two-dice tossing is...
\frac{1}{3}
\frac{1}{9}
\frac{1}{6}
\frac{1}{4}
19
Which of these is a continuous data?
Weight
Country of origin
Age in years
Number of words in a sentence
20
These are the prices of 10 books. What is the median?
$8
$9
$11
$10
21
"Everybody loves Indomie!", states someone. Why may this statement be biased?
Indomie is dangerous for your health
Indomie is not delicious
Everybody hates Indomie
It is not known who is exactly "everybody"
22
A dice is tossed 60 times, and the number 6 appears 26 times. The dice is fair.
False
True
