Question
A random sample of 100 ball bearings selected from a
shipment of 2000 ball bearing has an average diameter of 0.354 inches with standard deviation 0.048 inches. The 95% confidence interval for the average diameter of these 2000 ball bearings is:Solution
The correct answer is B
Determine the co-ordinates of the point where the line through the points A (3, 4, 1) and B (5, 1, 6) crosses the XY- plane?
A boat can travel 24 km upstream and 30 km downstream in 4 hours. Find the speed of the boat in still water if the speed of the stream is 3 km/h.
- In a group, if 3 people with an average weight of 70 kg leave, the average weight of the remaining group drops by 2 kg. However, if 4 people of average wei...
- In a 800 metres race, Tanya beats Ravi by 160 metres and Sumit by 240 metres. By how many metres does Ravi beat Sumit in the same race?
Find the equation if a point P(x, y) is equidistant from A(7, 3) and B(-3, 7).
A circle has its area eleven times greater than its circumference in numeric value. Find the circle’s diameter.
A product is bought for Rs. 1,800. The shopkeeper tags it at 25% above the cost price and offers a discount of Rs. 200 at the time of sale. What is the ...
The angle of elevation of a tower from a certain point of bus stand is 30°. When a man walks 5m ahead in the direction of the tower, the angle of el...
- Ritesh got 84 marks in an exam, which is 100% more than the marks secured by Mohan. If Mohan failed the exam by 4 marks, then find the total marks of Rites...
- A cyclist rode for 4 hours at a constant speed of 'x' km/h and then for 6 hours at a speed of (x - 10) km/h. If his average speed during the entire journey...
