Confidence Interval

Confidence Interval

11th Grade - University

20 Qs

quiz-placeholder

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Confidence Interval

Confidence Interval

Assessment

Quiz

Mathematics

11th Grade - University

Practice Problem

Medium

CCSS
HSS.IC.B.4, HSS.ID.A.4, HSS.IC.A.1

Standards-aligned

Created by

Shiuling Huang

Used 78+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Identify the confidence interval used in the figure below if each shaded area is equal to 0.05.

90%
95%
98%
99%

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

CCSS.HSS.ID.A.4

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The confidence level of an interval estimate of a parameter is the probability that the interval estimate will contain the parameter.

True
False

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

CCSS.HSS.ID.A.4

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Find the value of zc for a 90% confidence interval.

-1.96 
1.645
1.440
-1.598

Tags

CCSS.HSS.ID.A.4

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A research company wants to estimate the proportion of people who like oatmeal.  They want the confidence level to be 95%.  The company gets 325 people to sign up for the survey, but on the day that the survey is issued, only 250 people show up and take the survey.  What happens to the confidence interval?

It gets larger
It gets smaller
It stays the same
Too little information given

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

A sample size of n = 64 is drawn from a population whose standard deviation is σ = 5.6.


Find the margin of error for a 99% confidence interval for µ.

1.799

1.798

1.803

Tags

CCSS.HSS.IC.B.4

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

A large sample has mean of 7.1 and Standard Error of 2.3.


Construct a 90% Confidence Interval for the population mean µ (to two decimal places).

(3.32, 10.88)

(3.8, 7.1)

(3.3, 10.9)

(3.3165, 10.8835)

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

CCSS.HSS.ID.A.4

7.

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.


What is the point estimate?

75

105.2

10

0.90

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

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