The amount of time a certain brand of light bulb lasts is normally distribued with a mean of 1500 hours and a standard deviation of 40 hours. Out of 545 freshly installed light bulbs in a new large building, how many would be expected to last between 1430 hours and 1540 hours, to the nearest whole number?

A particular fruit's weights are normally distributed, with a mean of 786 grams and a standard deviation of 17 grams. The heaviest 18% of fruits weigh more than how many grams? Give your answer to the nearest gram.

C. The random sample of 625 batteries taken by the consumer organisation turned out to have a mean operating time of 19.35 hours. Does this sample look like it belongs to the sampling distribution displayed in Figure 1? Explain/Justify your answer. [Does this sample likely to happen?] Type your answer in this space - the box will expand automatically d. Given that the sample was randomly selected from all batteries manufactured by the Betterbuy Battery Company in March, and given that each battery's operating time was measured accurately, what conclusion can we reach from part (c)? Page 9 of 15

A particular fruit's weights are normally distributed, with a mean of 228 grams and a standard deviation of 20 grams. The heaviest 4% of fruits weigh more than how many grams? Give your answer to the nearest gram.

Suppose that the speeds of cars travelling on California freeways are normally distributed with a mean of 63 0 miles hour miles tickets for cars with speeds exceeding 80 . The records show that exactly 5% of the speeds exceed this limit. Find the standard deviation of the speeds of cars travelling on California freeways. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place. hour miles hour The highway patrol's policy is to issue

A particular fruit's weights are normally distributed, with a mean of 363 grams and a standard deviation of 17 grams.The heaviest 19% of fruits weigh more than how many grams?Give your answer to the nearest gram.

A particular fruit's weights are normally distributed, with a mean of 342 grams and a standard deviation of 14 grams.The heaviest 2% of fruits weigh more than how many grams?Give your answer to the nearest gram.

A particular fruit's weights are normally distributed, with a mean of 747 grams and a standard deviation of 21 grams.The heaviest 16% of fruits weigh more than how many grams?Give your answer to the nearest gram.

The mean IQ of 200,000 current and past University of Manitoba students has been found to be 81.9. The standard deviation was found to be 13.1. The student enrollment at the University of Manitoba in 2016 was 29,987. The minimum IQ to be able to graduate from the University of Winnipeg has been found to be 104. Of the 29,987 students at the University of Manitoba in 2016, how many would be expected to be smart enough to graduate from the University of Winnipeg? Assume a Gaussian distribution.

A clinic finds that the average patient stay is 5.7 hours with a standard deviation of 1.8.  If a patient has a relative stay of 2.4, find how many hours the patient was in the clinic. Give a 2-decimal answer