document.write( "Question 664462: My final passing grade is depending on some of these problems. (I have tried working out them & I have including my work, if it is correct please let me know, if not please correct me, and if its blank, I need help!.)Please HELP!
\n" ); document.write( "Problem #1
\n" ); document.write( "(A) Classify the following as example of nominal, ordinal, interval, or ratio level of measurement, and state why it represents this level: distance between two signposts.
\n" ); document.write( "(B) Determine if this data is qualitative or quantitative: Brown eyes
\n" ); document.write( "(C) In your own line of work, give one example of a discrete and one example of a continuous random variable, and describe why each is continuous or discrete.(Points:9)
\n" ); document.write( "My answers: (A) Interval, measured along a scale in which each position is of equal distance from one another.
\n" ); document.write( " (B) qualitative-It is a variable that describes or categorizes an element of population.
\n" ); document.write( " (C) A discrete random variable is whether I get the flu or not, and how many days I stay home. This is a countable finite number. A continuous random variable is how many minutes after the hour it actually takes my school bus to get out of the parking lot.
\n" ); document.write( "Problem #2
\n" ); document.write( " A study is performed to discern if there is any difference in sitting heart rate between those who have two or less cups of coffee per day and those who have three or more cups per day. Subjects are chosen at random based on whether they drink two or less or three or more cups of coffee per day and their heart rates measured at the same time each day for a period of 3 months. Find the following:
\n" ); document.write( "I. What is the population?
\n" ); document.write( "II. What is the sample?
\n" ); document.write( "III. Is the study observational or experimental? Justify your answer.
\n" ); document.write( "IV. What are the variables?
\n" ); document.write( "V. For each of these variables, what level of measurement (nominal, ordinal, interval, or ratio) was used to obtain data from these variables?
\n" ); document.write( "(Points: 12)
\n" ); document.write( "Problem #3
\n" ); document.write( " Construct both an ungroup and a grouped frequency distribution for the data given below:
\n" ); document.write( "124 115 11 112 118 123 121 116 114 113
\n" ); document.write( "118 110 110 112 116 118 120 115 120 110
\n" ); document.write( " (Points: 10)
\n" ); document.write( "Problem #4
\n" ); document.write( "Given the following frequency distribution, find the mean, variance, and standard deviation. Please show your work.
\n" ); document.write( "Class …… Frequency
\n" ); document.write( "71-73 ….. 17
\n" ); document.write( "74-76 …. 8
\n" ); document.write( "77 –79… 12
\n" ); document.write( "80 – 82 .. 7
\n" ); document.write( "83 -85…16
\n" ); document.write( "(Points:10)
\n" ); document.write( "Problem #5
\n" ); document.write( " The following data lists the average monthly snowfall for January in 15 cities around the US:
\n" ); document.write( "42 45 8 18 45 15 31 46
\n" ); document.write( "3 33 2 6 32 47 36
\n" ); document.write( "Find the mean, variance, and standard deviation. Please show all of your work.
\n" ); document.write( " (Points:10)
\n" ); document.write( "My work: mean is a sum of sf/ sum of f
\n" ); document.write( "4221/63=67
\n" ); document.write( "SD: first calculate SSx
\n" ); document.write( "SSx=Sx^2f-[(Sxf)^2/n]
\n" ); document.write( "284103-(4221^2/63)
\n" ); document.write( "1296
\n" ); document.write( "S=sqrt(SSx/n-1)
\n" ); document.write( "S=sqrt(1296/(63-1)]
\n" ); document.write( "S=4.572
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #413342 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
 
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document.write( "Hi,
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document.write( "What I redid is Problem 4, differences most likely due to my getting \"60\" not \"63\"
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document.write( "Did not see any work for Problem 5.
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document.write( "Check out 4 and  5
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document.write( "Class …… Frequency
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document.write( " 71-73 ….. 17
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document.write( " 74-76 …. 8
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document.write( " 77 –79… 12
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document.write( " 80 – 82 .. 7
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document.write( " 83 -85…16
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document.write( "MidPT(M)	f	M*f	M - m	(M - m)^2	f(M - m)^2
\n" );
document.write( "	72	17	1224	-5.85	34.2225	           581.7825
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document.write( "	75	8	600	-2.85	8.1225	            64.98
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document.write( "	78	12	936	0.15	0.0225	             0.27
\n" );
document.write( "	81	7	567	3.15	9.9225	            69.4575
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document.write( "	84	16	1344	6.15	37.8225	           605.16
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document.write( "sum		60	4671			           1321.65
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document.write( "		mean	77.85		          Variance 22.4
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document.write( "					               SD 4.732863826\r
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document.write( "\n" );
document.write( "                                                   \r
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document.write( "\n" );
document.write( "42 45 8 18 45 15 31 46 
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document.write( "3 33 2 6 32 47 36
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document.write( " 42	27.26666667	14.733	217.071
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document.write( "45	27.26666667	17.733	314.471
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document.write( "8	27.26666667	-19.267	371.204
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document.write( "18	27.26666667	-9.267	85.871
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document.write( "45	27.26666667	17.733	314.471
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document.write( "15	27.26666667	-12.267	150.471
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document.write( "31	27.26666667	3.733	13.938
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document.write( "46	27.26666667	18.733	350.938
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document.write( "3	27.26666667	-24.267	588.871
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document.write( "33	27.26666667	5.733	32.871
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document.write( "2	27.26666667	-25.267	638.404
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document.write( "6	27.26666667	-21.267	452.271
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document.write( "32	27.26666667	4.733	22.404
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document.write( "47	27.26666667	19.733	389.404
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document.write( "36	27.26666667	8.733	76.271
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document.write( "409			4018.933
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document.write( "27.26666667		Variance	287.067
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document.write( "845.2666667		SD	16.94305167
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document.write( " \n" );
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