Mathematics, 08.11.2019 06:31 samariahopkins4
1) psychology students at wittenberg university completed the dental anxiety scale questionnaire. scores on the scale range from 0 (no anxiety) to 20 (extreme anxiety). the mean score was 11 and the standard deviation was 3.5. assume that the distribution of all scores on the dental anxiety scale is normal with with \mu = 11 and \sigma = 3.5.
a) find the probability that someone scores between a 10 and a 15 on the dental anxiety scale.
b) find the probability that someone scores above a 17 on the dental anxiety scale.
2) ecological applications published a study on the development of forests following wildfires in the pacific northwest. one variable of interest to the researcher was tree diameter at breast height 110 years after the fire. the population of douglas fir trees was shown to have an approximately normal diameter distribution, with \mu = 50 centimeters and \sigma = 12 cm. find the diameter, d, such that 30% of the douglas fir trees in the population have diameters that exceed d.
Answers: 2
Mathematics, 21.06.2019 14:30
Part of the total score for each program is the sum of five program component scores. on the free program, the sum of these five program component scores is multiplied by a factor of 2.0. yuzuru hanyu, of japan, earned scores of 9.07, 8.96, 8.89, 9.21, and 9.36 for the program components portion of his free program. how many total points did he receive for this portion?
Answers: 1
Mathematics, 22.06.2019 00:40
Atest consists of 10 multiple choice questions, each with 5 possible answers, one of which is correct. to pass the test a student must get 60% or better on the test. if a student randomly guesses, what is the probability that the student will pass the test?
Answers: 2
Mathematics, 22.06.2019 01:00
Suppose 38 lbs of coffee beans are required to produce 2 lbs of farmer's coffee. how many lbs of coffee beans are required to produce 309 lbs of farmer's coffee?
Answers: 1
1) psychology students at wittenberg university completed the dental anxiety scale questionnaire. sc...
Mathematics, 06.04.2021 01:00
Chemistry, 06.04.2021 01:00
Mathematics, 06.04.2021 01:00
History, 06.04.2021 01:00
Mathematics, 06.04.2021 01:00
Mathematics, 06.04.2021 01:00