UNIVERSITY OF TRINIDAD AND TOBAGo B.A.Sc MATH2016 Quiz #1 [15%) 1. Dave\'s Autom
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UNIVERSITY OF TRINIDAD AND TOBAGo B.A.Sc MATH2016 Quiz #1 [15%) 1. Dave's Automatic Door the number of minules needed to instal a sample of s0 doorssa 32, and 42. Determiete (ararge, mesc mean (el d) medan nstalls automatic garage door openers. The folowng ist indicanes arge, (b) anithmetic mean, (el mean absolute deviation, ane 3 mkal 2 Consider data from a sample of 80 frms surveyed about the number a 12-month period of lost-time acidents in year? [ mk of the fiems experience? (a) what s the pencent frequency of four lost Sme accidents per (c) Which best describes the distribution of losl-tme accisents unform, uninow or unimodal and positively negatively skewed, unimodal and symmedric, of the pencentage of lights tha 3. The Unted States Department of Transportation keeps track amive within 15 minutes of the scheduied S tme, by airline. Below is the latest information Construct a stem-and-leaf chart from he dsta Summarize your condlusion 78.3 (NB: This is one continuous table-only split to save space) 42.545 2,6 What is the sample variance? Compute the sample standand deviation 3 mks 4. The weighits of the contents of seven small aspirin bottles are (n grams); 5. The table below shows the number of minutes to commute from home to work for a group of 32 38 41 25 23 19 31 26 21 28 16 a) Organize the data into a frequency distribution. b) Calculate the mean, modal amount c) Calculate the variance and standard deviation of the data 17 mks) ) Draw a histogram and a frequency polygon to ilustrate the dataExplanation / Answer
11)
A) Family income is a continuous data.
12) D) Ratio
Ratio measurement there is always an absolute zero that is meaningful. This means that you can construct a meaningful fraction (or ratio) with a ratio variable
13) D) Predicting
14)
B)Range, mean deviation , variance
15)
Here, upper class = 1720 , lower class = 1040
total classes= 7
Classs interval = ( 1720 - 1040) / 7 = 97.143 =100
17)
C) Mean
18)
c) Observations with the values of 200 are excluded from the class frequency
20)
multiply the 3.94* 6.74 = 26.556
then take the squareroot of 26.556 ,we get 5.15
C) 5.5
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