# STT205 TMA

Q1 The 75th percentile is the same as the ____ quartile

1st

2nd

3rd

4th

Q2 Which of these is closer to the mode for a skewed distribution

median

skewness

mean

modal

Q3 The difference between the harmonic mean of 2, 4, 8 and their geometric mean is

0.47

0.57

0.67

0.48

Q4 The empirical relationship between the mean and median is given by; mean �?? mode = x(mean �?? median) in the table below . Then x is _________________

4.5

3.0

4.0

1.0

Q5 If the mode of the distribution is X the \[\frac{X}{2}\] in the table below is _____________

9

3

18

2.5

Q6 The sum of the frequencies of 16 and 18 in the table below is _____________

15

3

12

14

Q7 What is the range of the set of data in the below

6.5

17

6

21

Q8 Any arrangement of r objects selected from a single group of n possible objects is called a ___________

factorial

combination

notation

permutation

Q9 What is the probability of not getting a 1 in the toss of a single die

\[\frac{1}{6}\]

\[\frac{3}{5}\]

\[\frac{5}{6}\]

\[\frac{2}{3}\]

Q10 ______ is not a measure of dispersion

mean

variance

standard deviation

coefficient of variation

Q11 A frequency curve of a normal distribution is ____ shaped

cup

bell

oblong

octagon

Q12 Calculate the standard deviation of the set of data in the table below

56.65

51.56

56.51

13.73

Q13 Calculate 70% of the mean of the set of data in the table below

2.975

29.75

42.5

4.25

Q14 What is the relative cumulative frequency of 50 in tha table below

\[\frac{4}{5}\]

\[\frac{7}{20}\]

1

16

Q15 What is the cumulative frequency of 40 in table below

\[\frac{9}{20}\]

9

7

10

Q16 Which of the following is not a source of data

Micro-statistical information

Macro-statistical information

Statistical information in business

survey designs

Q17 ____ is not an advantage of secondary data

They are inexpensive to collect

They are available on a wide range of subjects

They can be used to establish trends for forecasting

They are the most appropriate for any statistical work

Q18 Primary data is not collected through

surveys

observations

experiments

gazettes

Q19 Which of the following statement does not represent a role of statistics in the society

Government uses statistics as a tool for collecting economic aggregates

Government uses statistics only for census

Businesses use statistics to monitor the national economy

Government uses statistics to measure the effect of external factors on its policies

Q20 A characteristics that assumes different values for different entities is called __________________

sample

population

variable

random

Q21 _____ is the degree of peakness of a distribution

symmetry

platykurtic

variation

kurtosis

Q22 What is the geometric mean of 3, 5, 6, and 7

3.21

5.01

4.33

4.21

Q23 A Poisson distribution is given by \[p(x)=\frac{0.72^{x} e^{-0.72}}{x!}\]. Calculate the variance

0.23

0.72

5.72

2.27

Q24 The addition rule of probability is used for ___ events

independent

mutually exclusive

) mutually inclusive

dependent

Q25 ____ is not an axiom of probability

\[P(E)\leq 0\]

\[P(\Omega)= 0\]

\[P(E)\leq 1\]

\[P(\Omega)= 1\]

Q26 The square root of the sum of deviations of a set of numbers from their arithmetic mean is

zero

standard deviation

minimum

maximum

Q27 There are 5 different items to be stocked in a store with 3 bins for the storage. What are the possible number of arrangements

36

60

55

37

Q28 The following are examples of discrete random variables except

Bernoulli distribution

Binomial distribution

Poisson Distribution

Normal Distribution

Q29 36. If 5, 8, 6 and 2 occur with frequencies 3, 2, 4 and 1 respectively, find the mean

5.75

5.7

15.7

9.7

Q30 In an examination the score obtained is weighted 3 times as much as a test score. If a student scored 85% in the examination with a test score of 90%, what is his mean score

0.8625

0.8825

0.937

0.9

Q31 A student scored 45% in MTH101, 62% in MTH102, 30% in BUS103, and 70% in ACC101. Find his GPA if the respective credits are 3, 2, 2, 3

3.10

2.90

63%

3.90

Q32 Suppose there are 70 students in an examination with the students writing at least one of the subjects; Chemistry, Physics and Biology. Thirty(30) students offer Physics, 33 offer Chemistry and 40 offer biology, 10 students offer both Physics and Chemistry. Fourteen (14) of the students offer Physics and Biology, and 15 of them offer Biology and Chemistry. How many students offer only Biology

11

17

10

20

Q33 Suppose there are 70 students in an examination with the students writing at least one of the subjects; Chemistry, Physics and Biology. Thirty(30) students offer Physics, 33 offer Chemistry and 40 offer biology, 10 students offer both Physics and Chemistry. Fourteen (14) of the students offer Physics and Biology, and 15 of them offer Biology and Chemistry. Find the number of students that offer all subjects

11

6

7

8

Q34 An impossible event has the probability

1

0.5

0.25

Q35 The first step involved in constructing a group frequency distribution is to _________ (a) (b) count the number of items

tally

count the number of items

distribute

determine the number of classes

Q36 The square root of the sum of deviations of a set of numbers from their arithmetic mean is

zero

standard deviation

minimum

maximum

Q37 A set of data with only one mode is said to be

unicmodal

uniquemodal

singlemodal

unimodal

Q38 What is the sum of the medians of {3, 4, 4, 5, 6, 8, 8, 10} and {5, 5, 7, 9, 11, 12, 15, 18}

15.5

10.5

19.5

25.5

Q39 ____ statistics deals with methods of organizing, summarizing and presenting data in an informative way

Descriptive

Inferential

Frequency

Inductive

Q40 If at least one of the events of an experiment can occur, then they are said to be ___ events

collectively exhaustive

independent

mutually exclusive

dependent

Whatsapp 08039407882

**YOU CAN NOW GET YOUR EXAM SUMMARY FOR ALL YOU E-EXAMS FROM US.**

**What is exam summary?** **Click here to learn more.**

Tag:STT205, STT205 TMA

## 4 Comments

No answers to the questions….. Plss I need answers to these tma

Ok

please i need the stt205 tma solutions

Send me a message on whatsapp 08039407882…I am yet to upload it on here