CIND123 - Module 7

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Toronto Metropolitan University *

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123

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Statistics

Date

Jan 9, 2024

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2

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CINIZ23 - Madule 7 3. Suppose you wish to display the monthly salaries of empl Whi haR AT | | play y mployees. Which of the i y nter a grocery store, there are three simple events: buy nothing, buy a following would not be an appropriate choice for displaying this data attribute amount, or buy a large amount. If you buy a small amount. you cannot buy a graphically? |arge amount or buy n0thing. ThUS, the three events are: Please select the correct option and then click the "Check Your Answer” button. Please select the correct option and then click the "Check Your Answer” button. ® a. Pie chart O a. Independent O b. Steam and leaf plot O b. Dependent . O c. Box plot ® . MutuaHy exclusive D:=d; Histogram O d. None of the above G v Correct | v Correct P | | B 4. Which of the statements below are correct? - Please select the correct option and then click the "Check Your Answer™ button. 2. The proportion of observations from a normal bell-shaped curve that fall within + 2 Standard.deviation eFtha coniaies L. Adot plot shows frequency of qualitative data above a number line. Please select the correct option and then click the “Check Your Answer* button LA box plotis a graphical representation of data which divide the data into parts like O 4025 == minimum, first quartile, median, third quartile and maximum. O b.0.50 : ~ < a.Only| O ¢c.0.75 | - © b.Onlyll ® d 0095 c. Neither | nor Il ' d. Both | and |l ' v Adot plot shows frequency of numerical data above a number line. J ~/~Correct - 5. Which of the statements below are correct? ._ | | -* Please select the correct option and then click the "Check Your Answer" button. 7. Which of the statements below are correct? Please select the correct option and then click the "Check Your Answer” button. |. Data frames are more general than matrices. | . : . A | & | . The number of clients using credit cards is a discrete quantitative variable. Il. Each column of a data frame contains values of one variable. Il. The speed of your car on the highway is a continuous quantitative variable. O a.Only| | | | O a.0nlyl O b.Onlyll . O c. Neither | nor Il | O c Neither | nor | ® d.Bothlandll | | ® d.Bothlandll - dwColbectin ~ Correct statistics? e _ ‘Whic’héfthe following is a problem that does not need the use of inferential . Which of the following measures is not affected by extreme values in data? | s ~ Please selact the carrect option and then click the "Check Your Answer" button. o rrect option and then click the "Check Your Answer” button. Please selectthe co _ a. Scatter plot of midterm and final exams | e ) a.Mean . ® b Median © c.Range B | O d. Earthquake prediction bei e Corredl ~ ] & d. Variance | v Correct . - 9. Acoach is selecting 2 players to start in the game out of a team with a total of 8 players. How many different ways can the coach select his 2 players? Please select the correct option and then click the ”Check Your Answer” button. ® a.28 O b, 80 2 c 64 O d.56 Pt LR e 0 T AL 0 i B AT Sk T il b e e S S -3 v Correct. Solution: 81/612! 10. Six vehicles are selected from the vehicles that are issued campus parking permits, ~ and the following data are recorded: B it Al | BT ;}*l-‘,'"' ikl et il il ] “-!}&I.I.Ifl!lmflmlhlui&-mn}ttmdrl.fl.‘fm.hm i " ' P £S5 : FFEEs 3 SRy man B 7 EIC ISR s ry iy e Ir ‘,)..:‘_-'.'1’,_. e = TR T g - Pleass selactthe correct obton and then click the "Chec< Your Answer' button. Vehicle Type Make Carpool C?mmute oSl Distance Vehicle 1 Car Honda No / 23.6 2 Car | Toyota No / 17.2 3 Truck Toyota 4 Van Dodge cycle Davidson 5 | Motor- Harley- / ol 256 6 idar Chevrolet I No / 54 Which of the statements below are correct? - . The experimental units are the vehicles. Il.“Commute Distance” and “Age of Vehicle! are guantitative variables. 1. This data'set can be considered as bivariate. a. Only | . ® b landll
y va!ue wrthln a range is called f:hck the "Check Your Answer” button F’ieese se!ect the co rrect option and then - O =5 Drscrete variable b Continuous variable o C Dependent variable d lfldepehdent variable ,—g .:x‘.‘,,,c;; g3 = Ee= ‘i’ -:- 15. Which of the followrng is not a data structure in R? Please select the correct option and then click the O A Matrrx “Check Your Answer” button. ® b, Function Dar; Frame O d. Array v’ Correct . Which of the statements below are correct? F’feese select the correct option and then click the ! 'Check Your Ansuver bottofl i f'-i A matrrx Is similar to a data frame i in that it is rectangular with rows and columns = "except that every smgle element, regardless of the column, must be the same type. - The marn drfferenc:e between an array and a matrix is that matrices are restricted to = ‘tWO dtmensrons W’Tlle arrays can have an arbrtrary number. a Dnlyl b Ohly H c Nertherlhoril P - ® . Both land Il x/ Correct il 19. What is the output of the following code? Pleaze select the correct option and then click the "Check Your Answer" button. seq(-?-., 2, by=5) a.-1.5-1-0.50.00.51.0 1.5 b.2.01.51.0050.0-05-1.0-1.5-2.0 C 1005000519 0O o 0 d. 201510050005101520 ' . fm* -w Correct 20 You have the student numbers for some courses. The results are as follows: iy = P!:.-a:,_ select the correct option and then click the "Chack ‘roo'ao;.ue' =151 :zf[ L ‘-ClND1fi1€)(?85 stodeots) - | ¢ ND119 (230 students) - o = i No123 (302 students) - 5 . C}Noese (323,students) o , ;[f we waet to weealrze eategory distribution in this dataset, which of the following would be an appropriate - "’E*Cholee’? . | H | B . y od b T AL L b I ITRNTLY | mapniy [ il il i . ety MtE Al st bt ¢ AT l-.!%.""' (1 T - Sl M T l Scatter plot | . H Barp 1‘?"7 x il Pie Chart e | -; ()fll/ i i s Qs EE . Only il W e dnet HI 1 dland Ilt IA { 9 34 *‘,"‘. | | J | f i J ) 28 15 v It 3 B It i {ERHETH L Y ! I | | ' | . t R . pE o ¢ =0 S o A il (! ! 4" §iii ; | H | f t | 1| f I | | ) | l 5 ) i " LA L Y e : A‘ LN e VaoYi e i = CAAN |“'\4 ".’:‘.t g . W L e it HAT R LHILE IR A (AT A R L[ | \ T y B R N hiluLne (TSI L MRS o Ao ] I W ) L L, Rt = WA o AT IV, A L Th8 i 'Jf_‘ Wi | 1 11 {1 il [} | | CHIHHIVN N L i ni } I S OIS'I’EC - & LUEL A N 3 N R T J il I \“ .h!hi I (I H"“” | l S s Wil il ) ‘rjt'r o ‘[' 1 R "!‘l’ Il "'.‘Ir I ‘v'\f“.‘ ::“ i i 4 "f ,l,' i - % b === ,g,_a = B e = == g: = 4= =B % z = St =y EEEE i;' q SErE = 13 ‘What will be the output utput of the followrng code? = - P!ease select the correct option and then click the "Check Your Answer” button, = = function(a, b) ah’ Mt 1!l rr‘\f "\‘h”ln‘u I ‘{.I.J | ® b 25 -0 ¢ ] i ! fim' il l « Correct | LT | . 14 Whrch of the fo!lowrng grves all NA as a result? the "Check Your Answer” button. = | m | | Ifl‘tfi = = Xi*-‘,;TRUE o Y <FALSE Which of the following gives all NA as a result? ® 5 X277 V7 [ 7B X A X X 117. Which of the statements below are correct? Please select the correct option and then click the "Check Your Answer” button. l. Alist can store any number of items of only one type. i = ‘*f__;% === ,. i il i i Il. Both data frames and matrices are data structures of equal-length vectors. = | 0 Onlyl = | = i ir © b.Onlyli = O c¢. Neither | nor |l O d Bothlandll \/ Correct A L;st can store any number of rtems ofany type. ? = What IS the output‘? tease eeIeE' tl*e correct option and then clickthe Caece Your Answer battoo (TRUE H FALSE && TRUE) f-e.a NA Ok NULL e | 3 e@‘c_TRUE')‘ L = o a FALSE e * Mflbrmrwrwwrm-mrb'mm bwm T T— 14755 nt;:il et LT : T Dy h S AT S §2 o idEret :‘A: p‘ifll."»%E-HEA:'H&.‘»L"; [ET R e 2ap AR -"I i) I‘H,','. b : : i = : e - 7 . ;-{-,—7 = = V/.Sf‘-i--::.‘:',:‘— e T3 }'7".'5" X f.?é** ?fl”’? ‘?"E ,”"J Wfifit‘lmi‘#’ *h&rfiiflfl!fi?*‘.f! u‘Jf.z“'.‘!171(\:7'(.'1':‘:,’“'5.-1‘, EAAEAR LRI R ARG RN ES e Rt T e L g T o e SE ST e TR 2L 5w -
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