confidence intervals for means

Quiz
•
Mathematics
•
9th - 12th Grade
•
Medium
Standards-aligned
Alaina Johnson
Used 11+ times
FREE Resource
6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 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.
What is the point estimate?
75
105.2
10
0.90
Tags
CCSS.HSS.IC.A.1
CCSS.HSS.IC.B.4
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the margin of error for the interval (6.8, 12.9)?
9.85
3.05
3.50
6.8
Tags
CCSS.HSS.IC.B.4
3.
MULTIPLE CHOICE QUESTION
3 mins • 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 to $154,144. Give the 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.
There is a 90% chance that 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.
Tags
CCSS.HSS.IC.A.1
CCSS.HSS.IC.B.4
CCSS.HSS.ID.A.4
4.
MULTIPLE CHOICE QUESTION
3 mins • 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.
Tags
CCSS.HSS.IC.B.4
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
The lifetime of a certain type of battery 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)
Tags
CCSS.HSS.IC.A.1
CCSS.HSS.IC.B.4
CCSS.HSS.ID.A.4
6.
MULTIPLE CHOICE QUESTION
3 mins • 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.
Calculate the confidence interval.
101 to 104
100 to 105
99.5 to 105
98.7 to 106
Tags
CCSS.HSS.IC.A.1
CCSS.HSS.IC.B.4
CCSS.HSS.ID.A.4
Similar Resources on Quizizz
10 questions
Estimation of Parameters

Quiz
•
11th Grade
10 questions
Confidence Intervals for Population Proportions 6.3

Quiz
•
9th - 12th Grade
11 questions
Confidence Intervals intro Check quiz.

Quiz
•
12th Grade
10 questions
AP Statistics Confidence Intervals for Means and Proportions

Quiz
•
12th Grade - University
10 questions
Finding Confidence Intervals for Mean and Proportions

Quiz
•
12th Grade - University
9 questions
Confidence Intervals for a Proportion

Quiz
•
10th - 12th Grade
11 questions
Find the Confidence Intervals

Quiz
•
12th Grade - University
8 questions
Other Confidence Intervals

Quiz
•
12th Grade
Popular Resources on Quizizz
25 questions
Equations of Circles

Quiz
•
10th - 11th Grade
30 questions
Week 5 Memory Builder 1 (Multiplication and Division Facts)

Quiz
•
9th Grade
33 questions
Unit 3 Summative - Summer School: Immune System

Quiz
•
10th Grade
10 questions
Writing and Identifying Ratios Practice

Quiz
•
5th - 6th Grade
36 questions
Prime and Composite Numbers

Quiz
•
5th Grade
14 questions
Exterior and Interior angles of Polygons

Quiz
•
8th Grade
37 questions
Camp Re-cap Week 1 (no regression)

Quiz
•
9th - 12th Grade
46 questions
Biology Semester 1 Review

Quiz
•
10th Grade