Question Help ▼ The reading speed of second grade students in a large city is approximately normal, with a mean of 89 words per minute (wpm) and a standard deviation of 10 wpm. Complete parts (a) through (f). Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) What is the probability a randomly selected student in the city will read more than 93 words per minute? The probability is 0.3446. (Round to four decimal places as needed.) Interpret this probability. Select the correct choice below and fill in the answer box within your choice. O A. If 100 different students were chosen from this population, we would expect to read less than 93 words per minute. O B. If 100 different students were chosen from this population, we would expect to read exactly 93 words per minute. O C. If 100 different students were chosen from this population, we would expect to read more than 93 words per minute. Click to select and enter your answer(s) and then click Check Answer. ? 7 parts remaining Clear All Check Answer
Continuous Probability Distributions
Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.
Normal Distribution
Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!
 alt="Question Help
The reading speed of second grade students in a large city is approximately normal, with a mean of 89 words per minute (wpm) and a standard deviation of 10 wpm. Complete parts (a) through (f).
Click here to view the standard normal distribution table (page 1).
Click here to view the standard normal distribution table (page 2).
(a) What is the probability a randomly selected student in the city will read more than 93 words per minute?
The probability is 0.3446.
(Round to four decimal places as needed.)
Interpret this probability. Select the correct choice below and fill in the answer box within your choice.
O A. If 100 different students were chosen from this population, we would expect
to read less than 93 words per minute.
O B. If 100 different students were chosen from this population, we would expect
to read exactly 93 words per minute.
O C. If 100 different students were chosen from this population, we would expect
to read more than 93 words per minute.
Click to select and enter your answer(s) and then click Check Answer.
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