Determine the speeds of freight train and express train
The freight train and the express train leave towns 390 km apart, traveling toward one another. Freight train travels 30 km per hour slower than express train. They pass one another three hour later. Determine their speeds?
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The boat traveled 25km upstream. On return trip downstream, boat traveled 5km per hour faster. It trip took 10 minutes less time, determine speed of boat as it traveled upstream?
The monthly utility bills are normally distributed with mean value of $150 and standard deviation of $20. Determine the probability of having a utility bill between 135 and 170.
A Mall manager claims that in an average every customer spends $42 per single visit to the mall. To test this claim, you took sample of 49 customers and found the sample mean to be $39 and sample standard deviation to be $9. At alpha = 0.05, test
A Mall manager claims that in average every customer spends $42 per a single visit to the mall. To test this claim, you took a sample of 49 customers and found the sample mean to be $39 and the sample standard deviation to be $9.
Freight train travels 30 km per hour slower than express train. They pass one another three hour later. Determine their speeds?
Speed of current is 4kh/h, and speed of riverboat in still water is 12km/h. How far upstream must pilot travel before turning around?
A bank manager wanted to determine the mean number of transactions businesses make per month. For a sample of 55 businesses, he found that mean number of transaction per month to be 32 and the standard deviation to be 7.5 transactions.
A company's CEO wanted to determine the percentage of defective product per shipment. In a sample containing 500 products, he found 30 defective products.
Then jog at twice the walking speed for another two miles. If total time spent walking and jogging is one hour, determine walking and jogging rates.
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