Answered step by step
Verified Expert Solution
Question
1 Approved Answer
The test scores on a 100-point test were recorded for 20 students: 71 93 91 86 7573 86 82 76 5784 89 67 62 7277
The test scores on a 100-point test were recorded for 20 students:
71 93 91 86 7573 86 82 76 5784 89 67 62 7277 68 65 75 84
a. Can you reasonably assume that these test scores have been selected from a normal population? Use a stem and leaf plot to justify your answer.
b. Do the sample data suggest that the average test score is more than 75? Use = 0.05.
c. If these students can be considered a random sample from the population of all students,find a 95% confidence interval for the average test score in the population.
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started