Question
Discuss the method of questionnaire by post.
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Answer
self
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State the characteristics of an ideal questionnaire.
For the admission in a college, weight $40$ is given to the marks in $12\ th$ class and weight $60$ is given to the marks in entrance exam of each student. As per the merit list of the college, a student can get admission only if his weighted marks are $77 \%$. If a student scored $82 \%$ in $12\ th$ class and $78 \%$ in the entrance exam, can he get the admission to this college ?
→The economy growth rates of a state for four consecutive years are $2 \%, 2.5 \%, 3 \%, 4 \%$ respectively. Find the average growth rate using an appropriate average.
→In how many ways can cars of different models of company $A$ and cars of different models of company $B$ be parked in a row in a parking plot, so that cars of both the companies are parked alternately ?
→The mean of $50$ observations is $35.$ Later on, it was known that the value of one observation was taken as $50,$ which was wrong. Find the mean of remaining observations by excluding the wrong observation.
→From the following information of two groups, determine which group is less skewed :
Group $A$: $\bar{x}=256.5, M=260, s=15$
Group $B$: $\bar{x}=240.8, M=238, s=14$
→Group $A$: $\bar{x}=256.5, M=260, s=15$
Group $B$: $\bar{x}=240.8, M=238, s=14$
Write advantages and disadvantages of the standard deviation.
From the following information on two groups, state which group is closer to symmetry:
Group $A$: $n=50, \sum f_{i} x_{i}=1750, s^{2}=25, x+$
$M_{0}=72.5$
Group $B$: $n=120, \sum f_{i} x_{i}=6660, s^{2}=36, \bar{x}+$
$M_{0}=114.3$
→Group $A$: $n=50, \sum f_{i} x_{i}=1750, s^{2}=25, x+$
$M_{0}=72.5$
Group $B$: $n=120, \sum f_{i} x_{i}=6660, s^{2}=36, \bar{x}+$
$M_{0}=114.3$
For a geometric progression, $T_1{ }^2=T_2$ and $T_3=64$. Write the sequence.
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