General Science
Facultacult of Engineering
Almajmaa University
Stat-101
Second Mid Term
Time: 50 Minutes
:‫اجملموعة‬
Question-1: (10 Marks)
:‫اإلسم‬
Put (T) for the correct answer and (F) for the wrong
1. The quartiles measure the central tendency of a ranked data set.
2. The second quartile Q2 is the same as the median.
3. Interquartile range is greater than the normal range of a data set.
4. Approximately 25% of the values in a ranked data set are greater than the
third quartile Q3.
5. Percentiles divide a ranked data set into 100 equal parts.
6.
The probability of an event always lies in the range 0 to 1.
7. A simple event may include more than one outcome.
8. The probability that a randomly selected family owns a home is better
estimated using the classical probability approach.
9. The simple events of any experiment are always equally likely.
10. Subjective probability approach is used for experiments that neither have
equally likely outcomes nor can be repeated to generate data.
Question-2: (10 Marks)
A box contains 5 similar cards marked 1, 2, 3, 4 and 5 respectively. A card is
drawn from the box at random.
i. Draw a Venn diagram for the experiment.
ii. Draw a tree diagram for the experiment.
iii. Find the probability of each simple event if they are equally likely.
iv. Put the correct alphabetic answer in the front box for each of the
following (show your work):
1- The probabilty of " Getteng the number 2 " is
(A) 0 (B) 1 (C) 1/5
(D) 2/5
(E) 3/5
2- The probabilty of " Getteng an even number " is
(A) 0 (B) 1 (C) 1/5
(D) 2/5
(E) 3/5
3- The probabilty of " Getteng an odd number " is
(A) 0 (B) 1 (C) 1/5
(D) 2/5
(E) 3/5
4- The probabilty of " Getteng the number 6 " is
(A) 0 (B) 1 (C) 1/5
(D) 2/5
(E) 3/5
5- The probabilty of " Getteng, 1 ≤ number ≤ 5 " is
(A) 0 (B) 1 (C) 1/5
(D) 2/5
(E) 3/5
6- The probabilty of " Getteng a number greater than 2 " is
(A) 0 (B) 1 (C) 1/5
(D) 2/5
(E) 3/5
7- The event " Getteng an even number " is
(A) Simple (B) Compound (C) Impossible (D) Sure (E) Non of these
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Question-3: (10 Marks)
For the data set { 4, 2, 10, 16, 20, 8, 6, 18, 14, 12 }.
A. Put the correct answer in the front box for each of the following:
1. The second quartile, Q2 =
2. The first quartile, Q1 =
3. The third quartile, Q3 =
4. The Interquartile range =
5. The 80th percentile =
6. The percentile rank of 6 =
B. Draw a Box-and-Whisker plot.
C. Are there any outliers ?
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