Cluster Simple random sample is has a equal probability

STATISTICS-200 tests

1. The following data show the lengths of boats moored in a marina. The data are ordered from smallest to largest: 16; 17; 19; 20; 20; 21; 23; 24; 25; 25; 25; 26; 26; 27; 27; 27; 28; 29; 30; 32; 33; 33; 34; 35; 37; 39; 40 Calculate the mean.

2. The following data show the lengths of boats moored in a marina. The data are ordered from smallest to largest: 16; 17; 19; 20; 20; 21; 23; 24; 25; 25; 25; 26; 26; 27; 27; 27; 28; 29; 30; 32; 33; 33; 34; 35; 37; 39; 40 Identify the median.

3. The following data show the lengths of boats moored in a marina. The data are ordered from smallest to largest: 16; 17; 19; 20; 20; 21; 23; 24; 25; 25; 25; 26; 26; 27; 27; 27; 28; 29; 30; 32; 33; 33; 34; 35; 37; 39; 40 Identify the mode.

4.What is the geometric mean of the data set given? 5, 10, 20

5.If the data were collected by asking the first 111 people who entered the store, then the type of sampling is: cluster

6. Simple random sample is ….. has a equal probability

7. Organizing and summarizing data is called- descriptive statistics

8. The idea of sampling is observations are taken from a larger population

9. A statistic is studying methods for collecting, analyzing, interpreting and presenting empirical data.

10. A parameter is numbers that summarize data for an entire population

11. Types of Variables may be independent variable & dependent variable & categorical & numerical.

12. Data are

13. Qualitative data are gender types and …………….

14. Quantitative data only numbers

15. In a pie chart – a set of nominal data or displaying the different values of a given variable

16. In a bar graph –

17. A Pareto chart

18. A frequency is

19. A relative frequency is

20. Cumulative relative frequency is

21. which one is wrong

22. The affected variable is called

23. An outlier is

24. The median is

25. Quartiles are

26. The interquartile range is

27.The IQR can help find outliers

28. A Formula for Finding the kth Percentile

29. A Formula for Finding the Percentile of a Value in a Data Set

30. Statistics exam scores for 20 students are as follows: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93 Find the mode.

31. the distribution of data is skewed to the left if  the mean is less than the median,

32. the distribution of data is skewed to the right

33. a perfectly symmetrical distribution

34.the difference "x minus the mean" is called its devation

35. the average of the squares of the deviations is variance

36. Use the following data (first exam scores) from Susan Dean's spring pre-calculus class: 33; 42; 49; 49; 53; 55; 55; 61; 63; 67; 68; 68; 69; 69; 72; 73; 74; 78; 80; 83; 88; 88; 88; 90; 92; 94; 94; 94; 94; 96; 100 Calculate the sample mean

37.For Normal Distribution which ii true

38. Coefficient of Variation is-

39. Midpoint-

40. Mode is -

41. Percentile is -

42. Quartiles is -

43. To determine outliers which expressions is true?

44. 18; 21; 22; 25; 26; 27; 29; 30; 31; 33; 36; 37; 41; 42; 47; 52; 55; 57; 58; 62; 64; 67; 69; 71; 72; 73; 74; 76; 77 Find the 70th percentile. 62.6

45. 18; 21; 22; 25; 26; 27; 29; 30; 31; 33; 36; 37; 41; 42; 47; 52; 55; 57; 58; 62; 64; 67; 69; 71; 72; 73; 74; 76; 77 Find the 83rd percentile 71.07

46. 18; 21; 22; 25; 26; 27; 29; 30; 31; 33; 36; 37; 41; 42; 47; 52; 55; 57; 58; 62; 64; 67; 69; 71; 72; 73; 74; 76; 77 Find the percentile for 58.

47. 18; 21; 22; 25; 26; 27; 29; 30; 31; 33; 36; 37; 41; 42; 47; 52; 55; 57; 58; 62; 64; 67; 69; 71; 72; 73; 74; 76; 77 Find the percentile for 25.

48. 3; 4; 8; 8; 10; 11; 12; 13; 14; 15; 15; 16; 16; 17; 17; 18; 21; 22; 22; 24; 24; 25; 26; 26; 27; 27; 29; 29; 31; 32; 33; 33; 34; 34; 35; 37; 40; 44; 44; 47; Calculate the mean and the median

49. Mean is 30, the standard deviation is 6. Calculate the Coefficient of Variation – 20%

50. If the data were collected by asking the first 111 people who entered the store, then the type of sampling is: cluster

51. Of the three measures, which tends to reflect skewing the most, the mean, the mode, or the median? – mean

52.Which is the greatest, the mean, the mode, or the median of the data set? 11; 11; 12; 12; 12; 12; 13; 15; 17; 22; 22; 22 – mean

53. When the data are symmetrical, what is the typical relationship between the mean and median?

54. What is the geometric mean of the data set given? 9.000, 15.00, 21.00 – 14.15

55. What is the geometric mean of the data set given? 7.0, 10.0, 39.2

56. What is the geometric mean of the data set given? 17.00, 10.00, 19.00

57. bivariate data is two variables, where each value of one of the variables is paired with a value of the other variable.

58. multivariate data is a subdivision of statistics encompassing the simultaneous observation and analysis of more than one outcome variable

59. Numerical data is only numbers

60. A researcher is studying students in college in California. She takes a sample of 400 students from 10 colleges. The average age of all college students in California is

61. Half of the observations in a data set are greater than the mean median

62. A researcher is interested in the travel time of Utrecht University students to college. A group of 50 students is interviewed. Their mean travel time in 16.7 minutes. For this study the mean of 16.7 minutes is an example of a(n)

63. A researcher is curious about the IQ of students at the Utrecht University. The entire group students is an example of a:

64. Statistical techniques that summarize and organize the data are classified as:

65. A sports psychologist was interested in the effects of a six-week imagery intervention on an athlete’s ability to execute a sport-specific skills such penalty taking in football. How might you define the imagery variable?

66. Five-point Likert scales (strongly disagree, disagree, neutral, agree, strongly agree) are frequently used to measure motivations and attitudes. A Likert scale is a:

67. In a 500m speed skating race, time results would be considered an example of which level of measurement?

68. A researchers studies the factors that determine the number of children future couples decide to have. The variable ‘number of children’ is a :

69. A teacher asks students to identity their favorite reality television show. What type of measurement scale do the different television shows make up?

70. What is the mean for the following scores: 2, 5, 4, 1, 8?

4

3

20

5

71. What is the median for the following scores: 2, 5, 4, 1, 8?

72. Which of the following sets of scores has the greatest variability ( range)?

73. Which of the following statements is the most accurate description for the concept of standard deviation?

74.What is the variance for the following set of scores: 2, 2, 2, 2, 2.

75. R 2 is the notation for:

76. In a linear regression equation, Y=a + bX, what is the b denote?

77. In a linear regression equation, what does a slope of 2.5 indicate?