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The process of distinguishing between the null hypothesis and the alternative hypothesis is aided by considering two conceptual types of errors. The first type of error occurs when the null hypothesis is wrongly rejected. The second type of error occurs when the null hypothesis is wrongly not rejected. (The two types are known as type 1 and type 2 errors.)
A superbike takes 84 minutes to cover 112 km. If the speed of the superbike is decreased by 20 km/h, then find the time taken by the superbike to cover ...
A car running with a speed of ‘x’ m/sec makes 7 rounds of a circular field having radius 21 metres, in 12 seconds. Find the time taken by car to cov...
The speed of two cars A and B are in the ratio of 14:17 respectively. Car A travels 12 km less than the car B in the same time duration. What was the di...
A mother left her child at Bus stop 'P' in a bus station at 6:00 a.m. Four hours later, a bus departed from Bus stop 'Q' to Bus stop 'P' and passed the ...
A train moves at 90 km/h and needs to cover a journey in 2 hours. It halts for 10 minutes at the midpoint. What speed must it take for the second half?
Train A whose length is 180m is crosses a man standing in the bridge in 4.5 seconds. Train B whose length is165 m, is running at a speed of 63 km/hr and...
The speed of a car is 60% more than the speed of a bus. The train can cover (d-250) km distance in (t-3.5) hours. The car covers (d+140) km distance in ...
Parag starts chasing a Vipul, 4 hours after the Vipul starts running. Parag takes 5 hours to catch the Vipul. If the average speed of the Parag is 27 km...
A boat can go 3 km upstream and 5 km downstream in 55 minutes. It can also go 4 km upstream and 9 km downstream in 1 hour 25 minutes. In how much time (...
A train 200 m long passes a pole in 10 seconds. How long will it take to pass another train 300 m long running in the opposite direction at a speed of 3...