A school nurse believe that 5% of the Grade 7 students have below normal Body Mass Index (BMI) and should undergo a feeding program. After making a survey, she found that 18 of 210 randomly selected students have have below normal BMI. The Senior High School researchers claim that more than 20% of Senior High School male students have tried smoking cigarette. After collecting 150 random samples, they found that 30 of them have tried smoking cigarette. After launching the Water and Hygiene in School program, the principal believes that 95 % of the students applied tha proper handwashing techniques in school as well as at home. A random survey was conducted to 500 students and only 410 of them said they practiced correct handwashing technique both in school and at home A researcher claims that 50% of the rats in the locality are male. After randomly collecting sufficient amount of samples, he found that the proportion of male rats in the population of rats is 35%. Test the claim at 95% confidence level. A teacher wants to test his assumption that less than 30% of the Senior High School students like research class. After randomly collecting 150 samples, he found out that only 40 students like their research class.

A school nurse believe that 5% of the Grade 7 students have below normal Body Mass Index (BMI) and should undergo a feeding program. After making a survey, she found that 18 of 210 randomly selected students have have below normal BMI. The Senior High School researchers claim that more than 20% of Senior High School male students have tried smoking cigarette. After collecting 150 random samples, they found that 30 of them have tried smoking cigarette. After launching the Water and Hygiene in School program, the principal believes that 95 % of the students applied tha proper handwashing techniques in school as well as at home. A random survey was conducted to 500 students and only 410 of them said they practiced correct handwashing technique both in school and at home A researcher claims that 50% of the rats in the locality are male. After randomly collecting sufficient amount of samples, he found that the proportion of male rats in the population of rats is 35%. Test the claim at 95% confidence level. A teacher wants to test his assumption that less than 30% of the Senior High School students like research class. After randomly collecting 150 samples, he found out that only 40 students like their research class.

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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Concept explainers

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.

Question

100%

REJECTION REGION AND LEVEL OF SIGNIFICANCE

A.
Tell whether each situation calls for a two – tailed or one – tailed
test. On the appropriate space draw a happy face if it is two-tailed and sad face
if it is one-tailed.
A school nurse believe that 5% of the Grade 7 students have below
normal Body Mass Index (BMI) and should undergo a feeding program.
After making a survey, she found that 18 of 210 randomly selected
students have have below normal BMI.
The Senior High School researchers claim that more than 20% of Senior
High School male students have tried smoking cigarette. After collecting
150 random samples, they found that 30 of them have tried smoking
cigarette.
After launching the Water and Hygiene in School program, the principal
believes that 95 % of the students applied tha proper handwashing
techniques in school as well as at home. A random survey was
conducted to 500 students and only 410 of them said they practiced
correct handwashing technique both in school and at home
A researcher claims that 50% of the rats in the locality are male. After
randomly collecting sufficient amount of samples, he found that the
proportion of male rats in the population of rats is 35%. Test the claim at
95% confidence level.
A teacher wants to test his assumption that less than 30% of the Senior
High School students like research class. After randomly collecting 150
samples, he found out that only 40 students like their research class.

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