Finding Confidence Intervals Using T Distribution

Finding Confidence Intervals Using T Distribution

12th Grade

12 Qs

quiz-placeholder

Similar activities

Pre-Quiz Cal1

Pre-Quiz Cal1

University

10 Qs

Definite Integral Quiz

Definite Integral Quiz

12th Grade

10 Qs

II Component (Graph Theory)

II Component (Graph Theory)

University

10 Qs

Algebra: Solving Linear Equations

Algebra: Solving Linear Equations

University

11 Qs

Super easy quiz

Super easy quiz

9th - 12th Grade

11 Qs

Math 1110 -- College Algebra Midterm Review

Math 1110 -- College Algebra Midterm Review

University

15 Qs

Moments and Moment Generating Function

Moments and Moment Generating Function

University

11 Qs

principal value branch of inverse trigonometric functions

principal value branch of inverse trigonometric functions

12th Grade

10 Qs

Finding Confidence Intervals Using T Distribution

Finding Confidence Intervals Using T Distribution

Assessment

Quiz

Mathematics

12th Grade

Practice Problem

Medium

Created by

Anthony Clark

Used 1+ times

FREE Resource

AI

Enhance your content in a minute

Add similar questions
Adjust reading levels
Convert to real-world scenario
Translate activity
More...

12 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A person selects a random sample of 15 credit cards and determines the annual interest rate, in percent, of each one. The sample mean is 12.42 with a sample standard deviation of 1.3. It is desired to construct a 90% Confidence Interval.


Find the Standard Error to three decimal places.

0.336

0.33566

13.156

0.087

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The lifetime of a certain type of batter is known to be normally distributed with a standard deviation of 20 hours. A sample of 50 batteries had a mean lifetime of 120.1 hours. It is desired to construct a 99% confidence interval for the mean lifetime of this type of battery. What is the Confidence Interval to one decimal place?

(114.5, 125.6)

(112.8, 127.4)

(112.82, 127.38)

(114.56, 125.64)

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following actions would produce a confidence interval with a smaller width assuming all other contingencies remained constant?

Using a higher confidence level

Using a lower confidence level

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A 90% confidence interval for the average salary of all CEOs in the electronics industry was constructed using the results of a random survey of 45 CEOs. The interval was ($139,048, $154,144). Give a practical interpretation of the interval.

90% of the sampled CEOs have salaries that fell in the interval $139,048 to $154,144

We are 90% confident that the mean salary of all CEOs in the electronics industry falls in the interval $139,048 to $154,144. 

90% of all CEOs in the electronics industry have salaries that fall between $139,048 to $154,144

We are 90% confident that the mean salary of the sampled CEOs falls in the interval $139,048 to $154,144.

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following values below represents the critical value for a 98% confidence interval?

2.326

2.054

1.645

3.091

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Construct a 90% confidence interval of a random sample size of 19 cows with a mean of 155.526 and a standard deviation of 19.993. 

(146.54, 164.52)

(147.57, 163.48)

(147.59, 163.46)

(143.69, 167.36)

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following is an example of an interval estimate?

point estimate 

critical value

confidence interval

statistic

Access all questions and much more by creating a free account

Create resources

Host any resource

Get auto-graded reports

Google

Continue with Google

Email

Continue with Email

Classlink

Continue with Classlink

Clever

Continue with Clever

or continue with

Microsoft

Microsoft

Apple

Apple

Others

Others

Already have an account?