Casio STAT 2 Manuel d'utilisateur télécharger pdf (Page 54)

Introduction

Your classmate heard that there will be an additional student in

your math class next week. She is curious to see whether or not

that student’s height will fall within a 95% confidence interval

for the current students in her class.

Problems and Questions

1. How many students do you have in your class today?

_______________________________________________________

2. What is the degrees of freedom value for the n-value in

number one?

_______________________________________________________

3. For the 95% confidence interval, what would the p-value

be?

_______________________________________________________

4. What is the mean height of all the students in your class

today?

_______________________________________________________

5. What is the standard deviation of the height?

_______________________________________________________

6. Assuming the mean of the population is the same as the

sample, what is the 95% confidence interval for the height

of students?

_______________________________________________________

7. If the new student’s height was 172 centimeters, would he

fall into that 95% confidence interval? What about a 99%

confidence interval? Is there a difference? Why or why not?

_______________________________________________________

Name _____________________________________________ Class ________ Date ________________

Activity 10 • Class Height

Height in centimeters

1 2 ... 49 50 51 52 53 54 55 56 57 58 59 ... 96 97

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Casio STAT 2 Manuel d'utilisateur Page 54