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Statistics 2 Marks Each

Board Question Paper : July 2022 · Gujarat Board (GSEB) STD 12 Commerce (GSEB - English Medium). 9 questions.

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9 questions · timed · auto-graded

Question 32 Marks
If $N\left(k_1, 0.5\right)=\left(19.5, k_2\right)$ then find the value of $k_1$ and $k_2$.
Answer
$k _2=20.5$
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Question 42 Marks
Find parameters of the binomial distribution where mean $=4$ and variance $=2$.
Answer
$n =8 \text { and } p =\frac{1}{2}$
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Question 72 Marks
If the regression line of Yon $X$ is $\hat{y}=11.5+0.65 x$ and $\bar{y}=18$, find $\bar{x}$.
Answer
$\bar{x}=10$
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Question 92 Marks
The cost of living index numbers and average monthly wage from the year $2015$ to $2018$ are given as follows.
Each question carries $2$ marks :
Find the real wage for each year:
year $2015$ $2016$ $2017$ $2018$
Average Monthly wages (₹) $35,000$ $40,000$ $42,000$ $50,000$
Cost of living Index number $120$ $150$ $130$ $160$
Answer
$2015=29,166.67;2016=26.666 .67;2017=32,307.69;2018=31,250$
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2 Marks Each - Statistics STD 12 Commerce Questions - Vidyadip