Stats 1 week 3 important questions

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1. Q4The monthly electricity bills (in hundreds of rupees) of households are: 24, 41, 42, 57, 5
2. Q5The number of messages received by a user each day are: 15, 52, 33, 16, 39. Find the mean
3. Q6The heights (in cm) of plants in a lab are: 26, 8, 60, 47, 51, 34. Find the mean (2 decima
4. Q7The times (in seconds) taken by runners to finish a race are: 25, 53, 10, 22, 21, 29, 22.
5. Q8The weights (in kg) of parcels at a courier office are: 18, 21, 45, 26, 58, 14, 52, 23. Fi
6. Q9The marks of students in a quiz are: 60, 53, 52, 41, 49. Find the mean (2 decimal places).
7. Q10The daily steps (in hundreds) recorded by a walker are: 24, 41, 23, 59, 54, 9. Find the me
8. Q11The waiting times (in minutes) of patients at a clinic are: 25, 56, 25, 59, 52, 48, 22. Fi
9. Q12The monthly electricity bills (in hundreds of rupees) of households are: 58, 54, 30, 12, 4
10. Q13The data set is 9, 11, 11, 14, 16, 16, 18. How many modes does it have?
11. Q14The data set is 8, 10, 10, 13, 15, 15, 17. How many modes does it have?
12. Q15The data set is 10, 12, 12, 15, 17, 17, 19. How many modes does it have?
13. Q16The data set is 20, 22, 22, 25, 27, 27, 29. How many modes does it have?
14. Q17The monthly electricity bills (in hundreds of rupees) of households of 7 cases are: 21, 33
15. Q18The number of messages received by a user each day of 11 cases are: 31, 90, 19, 65, 10, 23
16. Q19The heights (in cm) of plants in a lab of 7 cases are: 13, 89, 75, 90, 10, 43, 78. Find th
17. Q20The times (in seconds) taken by runners to finish a race of 11 cases are: 13, 18, 42, 34,
18. Q21The weights (in kg) of parcels at a courier office of 15 cases are: 83, 33, 83, 18, 19, 72
19. Q22The marks of students in a quiz of 7 cases are: 14, 71, 69, 63, 13, 77, 47. Find the first
20. Q23The daily steps (in hundreds) recorded by a walker of 11 cases are: 60, 65, 19, 35, 68, 74
21. Q24The waiting times (in minutes) of patients at a clinic of 15 cases are: 42, 44, 86, 13, 63
22. Q25The daily steps (in hundreds) recorded by a walker are: 7, 9, 25, 27, 22. Find the sample
23. Q26The waiting times (in minutes) of patients at a clinic are: 26, 24, 12, 20, 15, 29. Find t
24. Q27The monthly electricity bills (in hundreds of rupees) of households are: 9, 26, 17, 30, 18
25. Q28The number of messages received by a user each day are: 21, 9, 28, 22, 17, 6, 4, 5. Find t
26. Q29The heights (in cm) of plants in a lab are: 11, 19, 29, 14, 27. Find the sample variance (
27. Q30The times (in seconds) taken by runners to finish a race are: 16, 28, 21, 27, 21, 13. Find
28. Q31The weights (in kg) of parcels at a courier office are: 18, 28, 30, 6, 18. Find the sample
29. Q32The marks of students in a quiz are: 18, 20, 8, 25, 8, 26, 28, 35. Find the population sta
30. Q33The daily steps (in hundreds) recorded by a walker are: 20, 11, 4, 26, 29. Find the sample
31. Q34The waiting times (in minutes) of patients at a clinic are: 15, 22, 25, 17, 14, 9. Find th
32. Q35The monthly electricity bills (in hundreds of rupees) of households are: 6, 7, 12, 18, 12.
33. Q36The number of messages received by a user each day are: 20, 25, 12, 11, 18, 24, 19, 15. Fi
34. Q37The heights (in cm) of plants in a lab are: 24, 6, 23, 27, 5. Find the sample variance (di
35. Q38The times (in seconds) taken by runners to finish a race are: 6, 30, 7, 14, 8, 7. Find the
36. Q39The weights (in kg) of parcels at a courier office are: 29, 22, 8, 25, 26. Find the sample
37. Q40The marks of students in a quiz are: 9, 10, 29, 15, 19, 16, 28, 26. Find the population st
38. Q41The mean of 6 observations is 24 and their sample standard deviation is 5. If 15 is added
39. Q42The mean of 6 observations is 34 and their sample standard deviation is 4. If 15 is added
40. Q43The mean of 8 observations is 15 and their sample standard deviation is 3. If every observ
41. Q44The mean of 8 observations is 28 and their sample standard deviation is 4. If every observ
42. Q45The mean of 8 observations is 38 and their sample standard deviation is 5. Every observati
43. Q46The mean of 6 observations is 25 and their sample standard deviation is 3. Every observati
44. Q47The mean of 8 observations is 25 and their sample standard deviation is 2. If 10 is added
45. Q48The mean of 10 observations is 19 and their sample standard deviation is 2. If 10 is added
46. Q49The mean of 10 observations is 31 and their sample standard deviation is 2. If every obser
47. Q50The mean of 6 observations is 34 and their sample standard deviation is 4. If every observ
48. Q51The mean of 6 observations is 29 and their sample standard deviation is 5. Every observati
49. Q52The mean of 10 observations is 15 and their sample standard deviation is 5. Every observat
50. Q53The mean of 6 observations is 20 and their sample standard deviation is 5. If 20 is added
51. Q54The mean of 10 observations is 18 and their sample standard deviation is 4. If 15 is added
52. Q55The mean of 6 observations is 35 and their sample standard deviation is 2. If every observ
53. Q56The mean of 10 observations is 11 and their sample standard deviation is 4. If every obser
54. Q57The mean of 6 observations is 36 and their sample standard deviation is 2. Every observati
55. Q58The mean of 6 observations is 38 and their sample standard deviation is 5. Every observati
56. Q59Select all the true statements about the effect of adding 3 to every observation on a data
57. Q60Select all the true statements about the effect of multiplying every observation by 2 on a
58. Q61Select all the true statements about the effect of adding 5 to every observation on a data
59. Q62Select all the true statements about the effect of multiplying every observation by 4 on a
60. Q63The mean of 10 observations was found to be 36. Later it was noticed that one observation
61. Q64Section A has 10 students with mean marks 42. Section B has 30 students with mean marks 79
62. Q65If the mean of the observations 2a, 10, 3a, 50 and 40 is 24, find the median of the data s
63. Q66The mean of 10 observations is 13.3. If 9 of them are 13, 14, 5, 16, 19, 5, 7, 7, 15, find
64. Q67The mean of 10 observations was found to be 56. Later it was noticed that one observation
65. Q68Section A has 20 students with mean marks 33. Section B has 30 students with mean marks 70
66. Q69If the mean of the observations 2a, 10, 3a, 50 and 40 is 30, find the median of the data s
67. Q70The mean of 8 observations is 14.5. If 7 of them are 16, 13, 8, 13, 8, 19, 7, find the rem
68. Q71The number of online courses completed by students in a semester is summarised below. |c|c
69. Q72The number of online courses completed by students in a semester is summarised below. |c|c
70. Q73The number of online courses completed by students in a semester is summarised below. |c|c
71. Q74The number of online courses completed by students in a semester is summarised below. |c|c
72. Q75The number of online courses completed by students in a semester is summarised below. |c|c
73. Q76The marks of students are grouped as follows. |c|c|c|c|c| Class 20-30 30-40 40-50 50-60, F
74. Q77The marks of students are grouped as follows. |c|c|c|c|c| Class 0-10 10-20 20-30 30-40, Fr
75. Q78The marks of students are grouped as follows. |c|c|c|c|c| Class 20-30 30-40 40-50 50-60, F
76. Q79The marks of students are grouped as follows. |c|c|c|c|c| Class 20-30 30-40 40-50 50-60, F
77. Q80The marks of students are grouped as follows. |c|c|c|c|c| Class 10-20 20-30 30-40 40-50, F
78. Q81A unimodal numerical data set has its mean greater than its median, and its median greater
79. Q82A unimodal numerical data set has its mean smaller than its median, and its median smaller
80. Q83A unimodal numerical data set has its mean, median and mode all equal. The distribution is
81. Q84A unimodal numerical data set has its mean greater than its median. The distribution is mo
82. Q85The histogram shows the marks of the students in a test. How many students took the test?
83. Q86The histogram shows the marks of the students in a test. In which class does the median li
84. Q87The histogram shows the marks of the students in a test. Estimate the mean mark using the
85. Q88Refer to the figure. The histogram shows the marks of the students in a test. How many stu
86. Q89Refer to the figure. The histogram shows the marks of the students in a test. In which cla
87. Q90Refer to the figure. The histogram shows the marks of the students in a test. Estimate the
88. Q91Look at the diagram given. The histogram shows the marks of the students in a test. How ma
89. Q92Look at the diagram given. The histogram shows the marks of the students in a test. In whi
90. Q93The box plot summarises the marks of 11 students (the whiskers reach the smallest and larg
91. Q94The box plot summarises the marks of 11 students (the whiskers reach the smallest and larg
92. Q95The box plot summarises the marks of 11 students (the whiskers reach the smallest and larg
93. Q96The box plot summarises the marks of 11 students (the whiskers reach the smallest and larg
94. Q97The stem-and-leaf plot shows the ages (in years) of 11 members of a club (stem = tens, lea
95. Q98The stem-and-leaf plot shows the ages (in years) of 11 members of a club (stem = tens, lea
96. Q99The stem-and-leaf plot shows the ages (in years) of 11 members of a club (stem = tens, lea
97. Q100The stem-and-leaf plot shows the ages (in years) of 11 members of a club (stem = tens, lea