After measuring the cortisol level in 30 students (see problem 1a) it is average cortisol levels measured at 324 nmol /I with a standard deviation of 48 nmol / I. We assume that the cortisol concentration follows a normal distribution. Rain out the margin of error in the measured average value for 95% confidence level. The standard normally distributed z-value is equal to 1.96 for a 95% confidence level.
After measuring the cortisol level in 30 students (see problem 1a) it is average cortisol levels measured at 324 nmol /I with a standard deviation of 48 nmol / I. We assume that the cortisol concentration follows a normal distribution. Rain out the margin of error in the measured average value for 95% confidence level. The standard normally distributed z-value is equal to 1.96 for a 95% confidence level.
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter13: The Chemistry Of Solutes And Solutions
Section: Chapter Questions
Problem 16QRT
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Please solve only 1b in 30 minute please
![Exercise 1b
After measuring the cortisol level in 30 students (see problem 1a) it is
average cortisol levels measured at 324 nmol /I with a standard deviation of
48 nmol / I. We assume that the cortisol concentration follows a normal distribution. Rain
out the margin of error in the measured average value for 95% confidence level.
The standard normally distributed z-value is equal to 1.96 for a 95% confidence level.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1fa6eb9a-87be-419d-aa10-5eb2dc2185a7%2F8a4b556a-2d2c-45d0-a9ec-db4c66983170%2Fjrtz2d_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Exercise 1b
After measuring the cortisol level in 30 students (see problem 1a) it is
average cortisol levels measured at 324 nmol /I with a standard deviation of
48 nmol / I. We assume that the cortisol concentration follows a normal distribution. Rain
out the margin of error in the measured average value for 95% confidence level.
The standard normally distributed z-value is equal to 1.96 for a 95% confidence level.
![1а
You will conduct a study at OsloMet where the stress level among
the students at the Study Program for Biotechnology and Chemistry will be mapped.
The stress level should be determined by measuring the morning concentration
the stress hormone cortisol in saliva samples collected from a sample of students.
Which sampling strategy do you want to choose to get as representative as possible
reply? The answer must be substantiated.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1fa6eb9a-87be-419d-aa10-5eb2dc2185a7%2F8a4b556a-2d2c-45d0-a9ec-db4c66983170%2Frwfswnj_processed.jpeg&w=3840&q=75)
Transcribed Image Text:1а
You will conduct a study at OsloMet where the stress level among
the students at the Study Program for Biotechnology and Chemistry will be mapped.
The stress level should be determined by measuring the morning concentration
the stress hormone cortisol in saliva samples collected from a sample of students.
Which sampling strategy do you want to choose to get as representative as possible
reply? The answer must be substantiated.
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