Question

Fluctuations in the exchange rate of dollars against the pound sterling over a short time period were approximated by a normal distribution with a mean of 2.01 and a standard deviation of 0.13. What is the probability that the rate on a particular day was more than 1.90?

Group of answer choices

0.8461

0.3023

0.8023

0.3461

None of the above

The contents of a particular bottle of shampoo marked as 150 ml are found to be 153 ml at an average, with a standard deviation of 2.5 ml. What proportion of shampoo bottles contain less than the marked quantity? Assume a normal distribution.

Group of answer choices

0.2192

0.1151

0.4452

0.0548

None of the above

Answer 1