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Published on: 09/11/2020
12th Standard Business Maths Probability Distributions English Medium Free Online Test One Mark Questions 2020 - 2021
Download Tamil Nadu 12th Standard Business Maths and Statistics question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Business Maths and Statistics Test
1.
For a normal distribution if the mean is m, mode is n and median is m, then ___________
m > m1 > m0
m < m1 < m0
m ≠ m1 x m0
m = m1 = m0
2.
In 8 throws of a die, 1 or 3 is considered a success. Then the mean number of successes is ___________
\(\frac{8}{3}\)
\(\frac{4}{3}\)
\(\frac{2}{3}\)
\(\frac{5}{3}\)
3.
The area under the standard normal curve between Z=-∞ and z=∞ is
0
0.5
1
0.75
4.
Cape town is estimated to have 21% of homes whose owners subscribe to the satelite service, DSTV. If a random sample of your home in taken, what is the probability that all four home subscribe to DSTV?
0.2100
0.5000
0.8791
0.0019
5.
Which of the following statements is/are true regarding the normal distribution curve?
it is symmetrical and bell shaped curve
it is asymptotic in that each end approaches the horizontal axis but never reaches it
its mean, median and mode are located at the same point
all of the above statements are true.
6.
The average percentage of failure in a certain examination is 40. The probability that out of a group of 6 candidates atleast 4 passed in the examination are ________.
0.5443
0.4543
0.5543
0.4573
7.
An experiment succeeds twice as often as it fails. The chance that in the next six trials, there shall be at least four successes is ________.
240/729
489/729
496/729
251/729
8.
The parameters of the normal distribution \(f(x)=\left(\frac{1}{\sqrt{72 \pi}}\right)\)\(\frac{e^{-(x-10)^{2}}}{72}\) –∞ < x < ∞ ________.
(10,6)
(10,36)
(6,10)
(36,10)
9.
If Z is a standard normal variate, the proportion of items lying between Z = –0.5 and Z = –3.0 is ________.
0.4987
0.1915
0.3072
0.3098
10.
Normal distribution was invented by ________.
Laplace
De-Moivre
Gauss
all the above
1.
(d)
m = m1 = m0
2.
(a)
\(\frac{8}{3}\)
3.
(c)
1
4.
(d)
0.0019
5.
(d)
all of the above statements are true.
6.
(a)
0.5443
7.
(c)
496/729
8.
(b)
(10,36)
9.
(c)
0.3072
10.
(b)
De-Moivre
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Tamilnadu Stateboard 12th Standard Subjects
Maths
Chemistry
Physics
Biology
Computer Science
Business Maths and Statistics
Economics
Commerce
Accountancy
History
Computer Applications
Biology
Computer Technology
Computer Applications
Computer Science
Business Maths and Statistics
Commerce
Economics
Maths
Chemistry
Physics
Computer Technology
History
Accountancy
Tamil
English
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