
T Distribution Confidence Intervals Mean
Authored by Anthony Clark
Mathematics
12th Grade

AI Actions
Add similar questions
Adjust reading levels
Convert to real-world scenario
Translate activity
More...
Content View
Student View
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In a crash test of 15 troopers, collision repair costs are found to have a distribution that is approximately normal, with a mean of $1800 and a standard deviation of $950. Construct a 99% confidence interval for the repair cost for the population.
(1070, 2530)
(1273, 2326)
(1799, 1801)
(1776, 1823)
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
A research group wishes to estimate the mean amount of time (in hours) that members of a fitness center spend exercising each week. They want to estimate the mean within a margin of error of 0.5 hours with a 95% level of confidence. Previous data suggests that the standard deviation of the population is 2.2. Which of the following is the smallest sample size they could use?
60
75
90
180
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The football coach randomly selected ten players and timed how long each player took to perform a certain drill. The times (in minutes) were: 13.2, 5.1, 7.5, 8.0, 12.7, 7.6, 13.8, 14.5, 7.7, and 10.5. Determine a 95 percent confidence interval for the mean time for all players.
12.30 < μ < 7.82
7.82 < μ < 12.30
7.72 < μ < 12.40
12.40 < μ < 7.72
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
An IQ test was given to a simple random sample of 75 students at a certain college. The sample mean score was 105.2. Scores on this test are known to have a standard deviation of 10. It is desired to construct a 90% confidence interval for the mean IQ scores of the students at the college. Find the critical value.
0.90
1.155
1.645
±1.645
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If the 95% Confidence Interval for a population mean is (114.56, 125.54), then is it likely that the true population mean µ is greater than 130?
Yes
No
Not enough information
I have no idea what you're asking of me
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A 90% confidence interval for the mean speed driven by cars on Due West Road is given by (21, 45). What was the sample mean of this study?
12
24
33
None of these.
Access all questions and much more by creating a free account
Create resources
Host any resource
Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever
or continue with

Microsoft
%20(1).png)
Apple
Others
Already have an account?
Similar Resources on Wayground
10 questions
MGSE.7.G2 (Triangles)
Quiz
•
KG - University
12 questions
REVISION: TOPIC 3 & TOPIC 4
Quiz
•
12th Grade
10 questions
Chapter1-intro to statistics part1
Quiz
•
University
10 questions
Geometric Series
Quiz
•
11th - 12th Grade
10 questions
Let's Play Together
Quiz
•
University - Professi...
10 questions
Precalculus 5.1-5.3 Quiz
Quiz
•
11th - 12th Grade
20 questions
Matrix
Quiz
•
University
10 questions
Equation of the circle
Quiz
•
10th Grade - University
Popular Resources on Wayground
15 questions
Fractions on a Number Line
Quiz
•
3rd Grade
20 questions
Equivalent Fractions
Quiz
•
3rd Grade
25 questions
Multiplication Facts
Quiz
•
5th Grade
29 questions
Alg. 1 Section 5.1 Coordinate Plane
Quiz
•
9th Grade
22 questions
fractions
Quiz
•
3rd Grade
11 questions
FOREST Effective communication
Lesson
•
KG
20 questions
Main Idea and Details
Quiz
•
5th Grade
20 questions
Context Clues
Quiz
•
6th Grade
Discover more resources for Mathematics
20 questions
SSS/SAS
Quiz
•
9th - 12th Grade
14 questions
Making Inferences From Samples
Quiz
•
7th - 12th Grade
23 questions
CCG - CH8 Polygon angles and area Review
Quiz
•
9th - 12th Grade
20 questions
Domain and Range Spiral Review
Quiz
•
9th - 12th Grade
10 questions
Dividing a polynomial by a monomial
Quiz
•
10th - 12th Grade
16 questions
Explore Triangle Congruence Theorems
Quiz
•
9th - 12th Grade
17 questions
Interpreting Graphs Of Functions
Quiz
•
8th - 12th Grade
15 questions
Explore Exponential Functions and Their Applications
Quiz
•
9th - 12th Grade