
please explain how to get answer -how to do it in Excel Question 1 The time...
The time a student sleeps per night has a distribution with mean 5.1 hours and a standard deviation of 0.4 hours. Find the probability that average sleeping time for a randomly selected sample of 30 students is more than 5 hours per night. (keep 4 decimal places)
Central Limit Theorem The time a student sleeps per night has a distribution with mean 6.2 hours and a standard deviation of 0.5 hours. Find the probability that average sleeping time for a randomly selected sample of 32 students is more than 6 hours per night. (keep 4 decimal places)
It is known that the number of hours a student sleeps per night has a normal distribution. The sleeping time in hours of a random sample of 8 students is given below. 8.6, 8.3, 7.6, 6, 7.1, 5.6, 5.1, 6. Compute a 98% confidence interval for the true mean time a student sleeps per night and fill in the blanks appropriately. We have 98 % confidence that the true mean time a student sleeps per night is between ____ and...
The time a student sleeps per night has a normal distribution with mean 6.2 hours and a standard deviation of 0.5 hours. Find the 32nd percentile of the sleeping time of students.
Suppose the amount of time college students sleep per night follows a normal distribution with mean 8 hours and standard deviation 0.75 hours. Let Y denote the amount of time a randomly selected student sleeps per night. What is P(7 < Y <9)? Round to 4 decimal places.
Question 6 Write the quadratic equation that has these roots 6 and a Write your answer in the form ax?+bx+c=0 X : I don't know 2 attempts You answered 5 out of 5 correctly. Asking up to 6.
May i get help with question 7 and 8. And will you please make
sure i did the rest correctly. If you zoom in you can see
questions. Thank you sooooo much.
Answer: 30 Dogs sleep an mean of 13 hours a night with a standard deviation of 1 hour (roughly, as per this article). Things are little more hectic at my house. Penny, lovingly referred to as demon puppy, barely sleeps. At best, she sleeps 10 hours a day...
Question 5 The average amount of a beverage in randomly selected 16-ounce beverage can is 15.9 ounces with a standard deviation of 0.5 ounces. If a random sample of sixty-four 16- ounce beverage cans is selected, what is the probability that mean of this sample is less than 16 ounces of beverage? (keep 4 decimal places) I don't know 2 attempts
4. Suppose that 75% of the students in a large class know how to answer a particular test question correctly. You take a random sample of n = 5 student exams from the class. (a) What is the probability that none of the 5 students answered the test question correctly? (b) If the instructor gives no partial credit. 4 points for a correct answer and 0 points for an incorrect answer, i. What are the mean and standard deviation of...
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Problem 7. A test contains n = 3 true or false questions. Any given student answers each question correctly with a certain probability called the "success rate"), independently acorss questions. In the class, 80% of the students know the materials quite well and have a success rate of p1 = 0.9, so the number of correct answers they get follows Bn, Pı). The rest of the students do not know...