Listed below are the ages of Dortmund College Students
27,31,19,21,26,25,20,18,17,45,23,26,21,20,19,25,24,26,51,39,17
Assuming there is a normal distribution...
Listed below are the ages of Dortmund College Students
27,31,19,21,26,25,20,18,17,45,23,26,21,20,19,25,24,26,51,39,17
Assuming there is a normal distribution for these ages, find the
probability that a student is at least 25 years old.
A college admissions director wishes to estimate the mean age of
all students currently enrolled. In...
A college admissions director wishes to estimate the mean age of
all students currently enrolled. In a random sample of 19 students,
the mean age is found to be 23.7 years. From past studies, the ages
of enrolled students are normally distributed with a standard
deviation of 10.4 years. Construct a 90% confidence interval for
the mean age of all students currently enrolled.
1. The critical value:
2. The standard deviation of the sample mean:
3. The margin of error...
A college admissions director wishes to estimate the mean age of
all students currently enrolled. In...
A college admissions director wishes to estimate the mean age of
all students currently enrolled. In a random sample of 22 students,
the mean age is found to be 21.4 years. From past studies, the ages
of enrolled students are normally distributed with a standard
deviation of 10.2 years. Construct a 90% confidence interval for
the mean age of all students currently enrolled.
1. What is the Critical value?
6. Almost all medical schools in the United States require
students to take the Medical College...
6. Almost all medical schools in the United States require
students to take the Medical College Admission Test (MCAT). The
scores follow a normal distribution. From published information the
standard deviation is 6.4. On a particular campus, the mean score
of those taking the MCAT is 25.0.
a. If a student is chosen at random, what is the probability the
individual’s score is between 20 and 30?
b. In a sample of 25 students, what is the sampling distribution
of...
The credit card balance for college students has a normal
distribution with a mean of $3450...
The credit card balance for college students has a normal
distribution with a mean of $3450 and a standard deviation of $995.
A random sample of 37 students is selected.
1)Describe the sampling distribution of the sample mean for the
37 students
A. X ~ AN(3450,995)
B. X ~ N(3450,163.577)
C. X ~ AN(3450,163.577)
D. X ~ N(3450,995)
2)Find the probability that the mean credit card balance for the
sample of 37 students is more than $3100.
A. 0.6368
B....