Mathematics, 25.05.2021 17:00 cravingnafi202
Let x be a random variable that represents the length of time it takes a student to write a history paper. It was found that x has an approximately normal distribution with mean μ = 7.5 hours and standard deviation σ = 1.8 hours. Do not round your final answers!
a. What is the probability that it takes at least 6 hours for a randomly selected student to write a history paper?
The probability is:
b. What is the probability that the mean time of writing a history paper for a random sample of 16 students is at most 7 hours?
The probability is:
Answers: 2
Another question on Mathematics
Mathematics, 21.06.2019 19:00
How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons
Answers: 1
Mathematics, 21.06.2019 19:30
Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?
Answers: 1
Mathematics, 21.06.2019 21:50
Question 14 (1 point) larry deposits $15 a week into a savings account. his balance in his savings account grows by a constant percent rate.
Answers: 3
Mathematics, 22.06.2019 02:00
(30 points). the population of a city is 45,000 and decreases 2% each year. if the trend continues, what will the population be aer 15 yrs
Answers: 2
You know the right answer?
Let x be a random variable that represents the length of time it takes a student to write a history...
Questions
Mathematics, 29.07.2021 02:50
Mathematics, 29.07.2021 02:50
Mathematics, 29.07.2021 02:50
Mathematics, 29.07.2021 02:50
Mathematics, 29.07.2021 02:50
Mathematics, 29.07.2021 02:50
Mathematics, 29.07.2021 02:50
Physics, 29.07.2021 02:50
Mathematics, 29.07.2021 02:50
Biology, 29.07.2021 02:50
Mathematics, 29.07.2021 02:50
