A statistics professor wants to estimate the mean score on a finalexam given to several classes. Prior knaaladye indiutes that the standand deviatiom is o= l1,5. How large should her sample be if she wants to be 90% Confidant that the Sauple mean is withn 2 pemts of the popu latrem mean?
A statistics professor wants to estimate the mean score on a finalexam given to several classes. Prior knaaladye indiutes that the standand deviatiom is o= l1,5. How large should her sample be if she wants to be 90% Confidant that the Sauple mean is withn 2 pemts of the popu latrem mean?
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.4: Collecting Data
Problem 1E
Related questions
Question
Please help me with this this two answers, I need them with explanation and formulas please
Transcribed Image Text:3 A statistics professor wants to estimate the Mlan score
on a final. exam.given to several classes, Prior knoaledye indicates
that the standand dreviatiom is o = ll.s. How large should
her sample be if she wants to be 90% Confidant that the
Sample n
mean is withen 2 ponts of the popu lation mean?
A stady of 390 Stadents show ed that the probablity of
Find a
Changing majors in. the frst twe years is e63 ,
99% Con ficdence nterval to estimate the probubility that a
Stadent will change their major ion the frst tue years.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 1 images
Recommended textbooks for you
Holt Mcdougal Larson Pre-algebra: Student Edition…
Algebra
ISBN:
9780547587776
Author:
HOLT MCDOUGAL
Publisher:
HOLT MCDOUGAL
Holt Mcdougal Larson Pre-algebra: Student Edition…
Algebra
ISBN:
9780547587776
Author:
HOLT MCDOUGAL
Publisher:
HOLT MCDOUGAL