1
GATE ME 2004
MCQ (Single Correct Answer)
+2
-0.6
The following data about the flow of liquid was observed in a continuous chemical process plant GATE ME 2004 Engineering Mathematics - Probability and Statistics Question 32 English

Mean flow rate of the liquid is

A
$$8.00$$ liters/sec
B
$$8.06$$ liters/sec
C
$$8.16$$ liters/sec
D
$$8.26$$ liters/sec
2
GATE ME 2000
MCQ (Single Correct Answer)
+2
-0.6
In a manufacturing plant, the probability of making a defective bolts is $$0.1$$. The mean and standard deviation of defective bolts in a total of $$900$$ bolts are respectively
A
$$90$$ and $$9$$
B
$$9$$ and $$90$$
C
$$81$$ and $$9$$
D
$$9$$ and $$81$$
3
GATE ME 1999
MCQ (Single Correct Answer)
+2
-0.6
Four arbitrary points $$\,\,\,\left( {{x_1},{y_1}} \right),\,\,\left( {{x_2},{y_2}} \right),\,\,\left( {{x_3},{y_3}} \right),\,\,\left( {{x_4},{y_4}} \right),\,\,\,\,$$ are given in the $$xy$$ $$-$$ plane using the method of least squares. If regression of $$y$$ upon $$x$$ gives the fitted line $$y=ax+b;$$ and regression of $$x$$ upon $$y$$ gives the fitted line $$x=cy+d,$$ then
A
the two fitted lines must coincide
B
the two fitted lines need not coincide
C
it is possible that $$ac=0$$
D
a must be $$1/c$$
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