Assume that the time to finish a small quiz, is denoted by X, which has a...
Assume that the time to finish a small quiz, is denoted by X, which has a normal distribution with a mean of 10 minutes and a standard deviation equal to 6 minutes. If a student is randomly selected .
- What is the probability that he/she finished the quiz in less than 12 minutes?
- Find the probability that he/she finished after 9 minutes?
- Find the probability that he/she needs at least 16 minutes to finish the quiz ?
- What percent of students need between 6 and 13 minutes to finish the quiz?
- Find the time represents the 85th percentile (cut-off for the top 15% of finishing times).
Homework Answers
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Assume that the time to finish a small quiz, is denoted by X,
which has a...
a. Time to finish a quiz in minutes follows a normal distribution with mean 6 and...
a. Time to finish a quiz in minutes follows a normal distribution with mean 6 and standard deviation .7. A student took 4.8 minutes. What is this student’s z-score? b. Time to finish a quiz in minutes follows a normal distribution with mean 6 and standard deviation .7. What proportion of students complete the quiz in less than 5.2 minutes? Use the normalcdf command on your calculator with 6 as the mean, .7 as the standard deviation, a very large negative...
please kindly make solution and answers visible. thanks Suppose that the amount of time that students...
please kindly make solution and answers visible. thanks
Suppose that the amount of time that students spend studying in the library in one sitting is normally distributed with mean 46 minutes and standard deviation 18 minutes. A researcher observed 8 students who entered the library to study. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X-NI b. What is the distribution of u? -N c. What is the distribution of ? --N([...
Time to Finish in 2012 Olympic Men’s Marathon In the 2012 Olympic Men’s Marathon, 85 athletes...
Time to Finish in 2012 Olympic Men’s Marathon In the 2012
Olympic Men’s Marathon, 85 athletes finished the race. Their times
are stored in the file OlympicMarathon. Use the times stored in the
Minutes column.
B.18 Time to Finish in 2012 Olympic Men's Marathon In the 2012 Olympic Men's Marathon, 85 athletes finished the race. Their times are stored in the file OlympicMarathon. Use the times stored in the Minutes column. (a) Use StatKey, other technology, or a random number...
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please write clearly thank you very much
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5 and 6 please The length of time it takes collese students to find a parking...
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and 6 please
The length of time it takes collese students to find a parking spot in the library parking lot follows a normal distribution with a mean of 3.0 minutes and a standard deviation of 1 minute. Find the probability that a randomly selected college student will find a parking spot in the library parking lot in less than 2.5 minutes. 6. About 74% of the residents in a town say that they are making an effort to...
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please kindly make solution and answers visible. thanks
Suppose that the amount of time that students spend studying in the library in one sitting is normally distributed with mean 46 minutes and standard deviation 18 minutes. A researcher observed 8 students who entered the library to study. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X-NI b. What is the distribution of u? -N c. What is the distribution of ? --N([...
Time to Finish in 2012 Olympic Men’s Marathon In the 2012
Olympic Men’s Marathon, 85 athletes finished the race. Their times
are stored in the file OlympicMarathon. Use the times stored in the
Minutes column.
B.18 Time to Finish in 2012 Olympic Men's Marathon In the 2012 Olympic Men's Marathon, 85 athletes finished the race. Their times are stored in the file OlympicMarathon. Use the times stored in the Minutes column. (a) Use StatKey, other technology, or a random number...
please write clearly thank you very much
6. (20 pts) A sprint duathlon consists of a 5 km run, a 20 km bike ride, followed by another 5 km run. The mean finish time of all participants in a recent duathlon deviation of 0.25 hours. Suppose a random sample of 30 participants finishing ti was 1.67 hours with a standard was taken and the mean me was found to be 1.59 hours with a standard deviation of 0.30 hours. (a)...
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5
and 6 please
The length of time it takes collese students to find a parking spot in the library parking lot follows a normal distribution with a mean of 3.0 minutes and a standard deviation of 1 minute. Find the probability that a randomly selected college student will find a parking spot in the library parking lot in less than 2.5 minutes. 6. About 74% of the residents in a town say that they are making an effort to...
DJ NU VUJU 5. In Brooklyn half marathon, the finish time is approximately normally distributed with a mean of 190 minutes and a standard deviation of 23 minutes. If Jim fail to win 80% of runners in Brooklyn half marathon, what is the finish time that Jim complete this race? 6. The General Electric claims that 100-watt light bulbs have normal distribution with a mean of 750 hours and a standard deviation of 60 hours. Find the probability that the...
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