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2. Ina random sample of 500 students in SNHS eating lunch, it was found out that 160 preferred sea foods. Construct a 90% confidence interval for the population proportion of all students in SNHS who eat sea foods.

2. Ina random sample of 500 students in SNHS eating lunch, it was found out that 160 preferred sea foods. Construct a 90% confidence interval for the population proportion of all students in SNHS who eat sea foods.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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please answer 2.  using z table

1. It is known from past records the grade point average of senior students is normally distributed with a standard deviation of 0.3. A researcher collects the grade point averoge of 36 sample students and found out that their mean grade is 2.6. Find a 95% confidence interval for the grade point average of the entire senior students. 2. Ina random sample of 500 students in SNHS eating lunch, it was found out that 160 preferred sea foods. Construct a 90% confidence interval for the population proportion of all students in SNHS who eat sea foods.
Transcribed Image Text:1. It is known from past records the grade point average of senior students is normally distributed with a standard deviation of 0.3. A researcher collects the grade point averoge of 36 sample students and found out that their mean grade is 2.6. Find a 95% confidence interval for the grade point average of the entire senior students. 2. Ina random sample of 500 students in SNHS eating lunch, it was found out that 160 preferred sea foods. Construct a 90% confidence interval for the population proportion of all students in SNHS who eat sea foods.
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