onsider the 'Diamond' dataset. It is provided as Microsoft Excel Workbook. Data are for 308 round-cut diamonds, taken from a newspaper ad. The codes are as follows: IDNO - an identification number for each data point. WEIGHT - weight of the diamond, in carats. COLOR - degree of colour purity in the diamond: "D" represents top colour purity grade; Lesser grades are "E", "F", and so on, through the alphabet. Note that these grades are ranked and should be coded according to their order. CLARITY - diamond clarity (presence or absence of minute flaws): "IF" means "internally flawless" - the top grade; "VVS1" and "VVS2" for "very very slightly imperfect"; and, "VS1" and "VS2" for "very slightly imperfect". Note that these grades are ranked and should be coded according to their order. RATER - the diamond was evaluated by one of three independent rating agencies: "GIA" - Gemmological Institute of America (based in New York); "IGI" - International Gemmological Institute (Antwerp); "HRD" - Hoge Raad Voor Diamant (Antwerp). PRICE - in Singapore dollars.
Consider the 'Diamond' dataset. It is provided as Microsoft Excel Workbook. Data are for 308 round-cut diamonds, taken from a newspaper ad. The codes are as follows:
- IDNO - an identification number for each data point.
- WEIGHT - weight of the diamond, in carats.
- COLOR - degree of colour purity in the diamond: "D" represents top colour purity grade; Lesser grades are "E", "F", and so on, through the alphabet. Note that these grades are ranked and should be coded according to their order.
- CLARITY - diamond clarity (presence or absence of minute flaws): "IF" means "internally flawless" - the top grade; "VVS1" and "VVS2" for "very very slightly imperfect"; and, "VS1" and "VS2" for "very slightly imperfect". Note that these grades are ranked and should be coded according to their order.
- RATER - the diamond was evaluated by one of three independent rating agencies: "GIA" - Gemmological Institute of America (based in New York); "IGI" - International Gemmological Institute (Antwerp); "HRD" - Hoge Raad Voor Diamant (Antwerp).
- PRICE - in Singapore dollars.
PLEASE REFER TO THIS LINK ALL DATA INSIDE THIS https://files.fm/u/ef7g9uvqx
3.2. A fourth argument is that diamond weight is not the sole predictor of diamond price. Diamond colour and clarity are also significant predictor or diamond price. Provide statistical evidence to prove or disprove that argument.
PLEASE REFER TO THIS LINK ALL DATA INSIDE THIS https://files.fm/u/ef7g9uvqx
For all answers above, be sure to include relevant SPSS output (graphs, tables) to support your solutions (screenshots must include the time and date of your work).
You should interpret, discuss and report your answers. You should proceed if any of the assumptions is violated. However, you must report it.
PLEASE SHOW ME THE PROPER WAY HOW TO WRITE WHEN INSIDE THE SPSS AND ALSO THE DATA OR OUTPUT.
The objective is to test whether not only the diamond weight but also diamond color and clarity are also significant predictors on diamond price.
From the data, there are 6 variables Idno, Weight, color, clarity, rater and price.
Here, diamond price is a dependent variable. Weight, color ,clarity and rater are the independent variables.
The multiple regression equation for predicting diamond price is,
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