Confidence Interval MCQ Tests
11th Class Statistics MCQ Tests
Confidence Interval
of 11th Class Statistics has 5 questions. If you take an online MCQ test, the system will randomly choose the questions. If you want to take the quiz by chapter then click the start test button.
Total Questions: 5
Total Marks: 5
Time: 5 Mins
Total Questions: 5
Total Marks: 5
Time: 5 Mins
5Min : 00 Sec Remaining
Question # 1
In a large mall a survey was taken. It was found that in a random sample of 45 women over the age of 25, 15 had children. Find the 90% confidence interval estimate for the true proportion of women over the age of 25 in the mall who have children.
Question # 2
Average score obtained by 10 students in a test is 25. Standard deviation of the sample is 8. Find the confidence interval at 95% confidence level?
Question # 3
A topic of interest in ophthalmology is whether or not spherical refraction differs between the left and right eye on average. In a study to investigate this, refraction was measured on the left and right eye of 17 patients. The differences (right - left) in diopters was -3.5 with a sample standard deviation of 7.5. Assuming normality, provide a 90% confidence interval for the average difference (right - left).
Question # 4
A survey was conducted to determine what percentage of college seniors would have chosen to attend a different college if they had known then what they know now. In a random sample of 100 seniors, 34% indicated that they would have attended a different college. Find 90% confidence interval for the percentage of all seniors who would have attended a different college .
Question # 5
A random sample of 100 ACT scores of students applying to western yields X = 21.2 with a sample deviation of 4.46. Find a 90% confidence interval for the true of ACT score μ of all applicants.
Total Questions
12345
Question # 1
In a large mall a survey was taken. It was found that in a random sample of 45 women over the age of 25, 15 had children. Find the 90% confidence interval estimate for the true proportion of women over the age of 25 in the mall who have children.
Question # 2
Average score obtained by 10 students in a test is 25. Standard deviation of the sample is 8. Find the confidence interval at 95% confidence level?
Question # 3
A topic of interest in ophthalmology is whether or not spherical refraction differs between the left and right eye on average. In a study to investigate this, refraction was measured on the left and right eye of 17 patients. The differences (right - left) in diopters was -3.5 with a sample standard deviation of 7.5. Assuming normality, provide a 90% confidence interval for the average difference (right - left).
Question # 4
A survey was conducted to determine what percentage of college seniors would have chosen to attend a different college if they had known then what they know now. In a random sample of 100 seniors, 34% indicated that they would have attended a different college. Find 90% confidence interval for the percentage of all seniors who would have attended a different college .
Question # 5
A random sample of 100 ACT scores of students applying to western yields X = 21.2 with a sample deviation of 4.46. Find a 90% confidence interval for the true of ACT score μ of all applicants.
Total Questions
12345
Statistics
- Representation and Exploration of Data
- Measure of Central Tendency or Averages
- Measures of Dispersion
- Index Numbers
- Regression and Correlation Analysis
- Analysis of Time Series
- Set Theory
- Introduction to Probability
- Random Variables and Distributions
- Binomial and Hypergeometric Distributions
- The Normal Distribution
- Sampling and Sampling Distributions
- Statistical Inference:Estimation
- Statistical Inference:Hypothesis Testing
- Association of Attributes
11th Class Online Classes 2026
Updated on: 22-05-2026
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