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Class 11 Mathematics Chapter 15 Statistics Quiz 28 (25 MCQs)

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1. What is sample space?
2. What is the process of analyzing data to uncover patterns and trends in data sets?
3. Ms. Perez, a statistics teacher, wants to analyze the heights of students in her school. She randomly selects a sample of 50 students and measures their heights. She plans to use the Central Limit Theorem (CLT) to draw conclusions for her study. Which test-statistic would be appropriate to use?
4. Population or Sample?A factory overseer selects 40 threaded rods at random from those produced that week at the factory, then she tests their tensile strength.
5. The square root of the average squared deviations from the mean of scores in a distribution; measure of variability.
6. What is a quantitative variable that could have an infinite number of values?
7. What is an example of a nominal data?
8. Suppose a researcher is concerned with a nominal scale that identifies users versus nonusers of bank credit cards. The measure of central tendency appropriate to this scale is the
9. Ken wants to compare how many hours a week that sixth graders spend doing mathematics homework to how many hours a week that eleventh graders spend doing mathematics homework. He randomly selects ten sixth graders and ten eleventh graders and records how many hours each student spent on mathematics homework in a certain week.What study is described?
10. The covariance between two variables x and y is 8.4 and their variances are 25 and 36 respectively. Calculate Karl Pearson's correlation coefficient between them.
11. The mean of a set of 3 numbers is 100. If 85 is removed from the set, what is the new mean?
12. What is the nature of data that can be distinguished by some nonnumeric characteristics?
13. Solution space of the inequalities 2x + y < 10 and x-y < 5:(i) includes the origin (ii) includes the point (4, 3) Which one is correct?
14. It is a numerical description of a sample characteristic
15. Find the class mark of class 135-155.
16. If log$_{2}$(x) = 4, what is the value of x?
17. "There are three degreesof lies lies, damned lies and statistics" . This is said by
18. Identify the type of random variable:The time it takes for a light bulb to burn out.
19. 10% of college students are predicted to travel out the country during spring break.
20. Which of the following is the number that occurs most often in a data set?
21. If the range of a set of scores is 14 and the lowest score is 7, what is the highest score?
22. What is the name given to a rectangular array of numbers arranged in rows and columns?
23. Ana had test scores of:72, 94, 108, 60. What is the range of her test scores?
24. Who is the father of statistics?
25. Which of the following referred to as indirect method of gathering data where the respondents used to answer written questions?
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