Question

In: Statistics and Probability

The amounts of time per workout an athlete uses a stairclimber are normally​ distributed, with a...

The amounts of time per workout an athlete uses a stairclimber are normally​ distributed, with a mean of 24 minutes and a standard deviation of 5 minutes. Find the probability that a randomly selected athlete uses a stairclimber for​ (a) less than 20 ​minutes, (b) between 24 and 32 ​minutes, and​ (c) more than 40 minutes

Solutions

Expert Solution

  Z TABLE VALUES ARE PROVIDED BELOW :

orchestra answered 1 year ago
Next > < Previous

Related Solutions

The amounts of time per workout an athlete uses a stair climber are normally​ distributed, with...
The amounts of time per workout an athlete uses a stair climber are normally​ distributed, with a mean of 21 minutes and a standard deviation of 5 minutes. Find the probability that a randomly selected athlete uses a stair climber for​ (a) less than 17 ​minutes, (b) between 21 and 28 ​minutes, and​ (c) more than 30 minutes.
The times per week a student uses a lab computer are normally​ distributed, with a mean...
The times per week a student uses a lab computer are normally​ distributed, with a mean of 6.5 hours and a standard deviation of 1.5 hours. A student is randomly selected. Find the following probabilities. ​(a) Find the probability that the student uses a lab computer less than 3 hours per week. ​(b) Find the probability that the student uses a lab computer between 6 and 8 hours per week. ​(c) Find the probability that the student uses a lab...
A) The amounts of nicotine in a certain brand of cigarette are normally distributed with a...
A) The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.941 g and a standard deviation of 0.319 g. The company that produces these cigarettes claims that it has now reduced the amount of nicotine. The supporting evidence consists of a sample of 30 cigarettes with a mean nicotine amount of 0.848 g. Assuming that the given mean and standard deviation have NOT changed, find the probability of randomly selecting 30 cigarettes...
Time spent using email per session is normally distributed with a mean of 20 minutes and...
Time spent using email per session is normally distributed with a mean of 20 minutes and a standard deviation of 3 minutes. (a) What is the probability that time spent using email per session is greater than 21 minutes? (b) What is the probability that time spent using email per session is between 18.3 minutes and 22.6 minutes? (c) What is the probability that a random sample of 64 email users will spend an average time greater than 21 minutes?...
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean...
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.883 g and a standard deviation of 0.293 g. The company that produces these cigarettes claims that it has now reduced the amount of nicotine. In what range would you expect to find the middle 95% of amounts of nicotine in these cigarettes (assuming the mean has not changed)? Between and . If you were to draw samples of size 30 from this...
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean...
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.902 g and a standard deviation of 0.287 g. The company that produces these cigarettes claims that it has now reduced the amount of nicotine. The supporting evidence consists of a sample of 33 cigarettes with a mean nicotine amount of 0.832 g. Assuming that the given mean and standard deviation have NOT changed, find the probability of randomly seleting 33 cigarettes with...
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean...
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.946 g and a standard deviation of 0.326 g. The company that produces these cigarettes claims that it has now reduced the amount of nicotine. In what range would you expect to find the middle 98% of amounts of nicotine in these cigarettes (assuming the mean has not changed)? Between  and . If you were to draw samples of size 46 from this population,...
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean...
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.911 g and a standard deviation of 0.297 g. The company that produces these cigarettes claims that it has now reduced the amount of nicotine. In what range would you expect to find the middle 50% of amounts of nicotine in these cigarettes (assuming the mean has not changed)? Between ____ and ____. If you were to draw samples of size 54 from...
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean...
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.893 g and a standard deviation of 0.306 g. The company that produces these cigarettes claims that it has now reduced the amount of nicotine. The supporting evidence consists of a sample of 44 cigarettes with a mean nicotine amount of 0.819 g. Assuming that the given mean and standard deviation have NOT changed, find the probability of randomly selecting 44 cigarettes with...
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean...
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.962 g and a standard deviation of 0.313 g. The company that produces these cigarettes claims that it has now reduced the amount of nicotine. The supporting evidence consists of a sample of 48 cigarettes with a mean nicotine amount of 0.899 g. Assuming that the given mean and standard deviation have NOT changed, find the probability of randomly seleting 48 cigarettes with...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT