感官實驗和實習報告-感官評定數(shù)據(jù)處理方法

2023年春食品感官評定試驗數(shù)據(jù)處理方法1、試驗一3點檢驗法評定兩種品牌純牛奶的風味是否有不同品的數(shù)量越多〔大通過查表〔另見圖片，假設數(shù)值大于表中的臨界值〔著差異所需的最小正確推斷數(shù)差異。23Basker表中臨界值比較“3”，最不寵愛的位置賦值上“1”，排在中間位置的賦值上“2”，然后計算各樣品的排序和，再計算兩兩樣品之間的排序和差，兩“這兩個樣品寵愛程度不同”的結論，需要看此排序和差是否大于表中的差異顯著性成立需要的最小值，假設大于，則可得出結論：“這兩個樣品寵愛程度不同”，假設沒有大于表中最小值，則得出：“這兩個樣品寵愛程度一樣”。Basker表排序和之間差異的臨界值〔p=0.05〕評價排列產(chǎn)品數(shù)員數(shù)2345678910208.814.821.027.333.740.347.053.760.6219.015.221.528.034.641.348.155.162.1229.215.522.028.635.442.349.256.463.5239.415.922.529.336.243.250.357.665.0249.616.223.029.936.944.151.458.966.4259.816.623.530.537.745.052.560.167.72610.016.923.931.138.445.953.561.369.12710.217.224.431.739.246.854.662.470.42810.417.524.832.339.947.755.663.671.72910.617.825.332.840.648.556.564.772.93010.718.225.733.441.349.357.565.874.23110.918.526.134.042.050.258.566.975.43211.118.726.534.542.651.059.468.076.63311.319.026.935.043.351.760.369.077.83411.419.327.335.644.052.561.270.179.03511.619.627.736.144.653.362.171.180.13611.819.928.136.645.254.063.072.181.33711.920.228.537.145.954.863.973.182.43812.120.428.937.646.555.564.774.183.53912.220.729.338.147.156.365.675.084.64012.421.029.738.647.757.066.476.085.74112.621.230.039.148.357.767.276.986.74212.721.530.439.548.958.468.077.987.84312.921.730.840.049.459.168.878.888.84413.022.031.140.550.059.869.679.789.94513.122.231.540.950.660.470.480.690.94613.322.531.841.451.161.171.281.591.94713.422.732.241.851.761.872.082.492.94813.623.032.542.352.22.472.783.293.84913.723.232.842.752.863.173.584.194.85013.923.433.243.153.363.774.285.095.85514.524.634.845.255.966.877.989.1100.56015.225.736.347.358.469.881.393.1104.96515.826.737.849.260.872.684.696.9109.27016.427.739.251.063.175.487.8100.5113.38017.529.642.054.667.480.693.9107.5121.29018.631.444.557.971.585.599.6114.0128.510019.633.146.961.075.490.1105.0120.1135.511020.634.849.264.079.194.5110.1136.0142.112021.536.351.466.882.698.7115.0131.6148.4x2〔卡方〕值，與x2臨界值比較評價員菠蘿風味大蒜風味薄荷風味評價員菠蘿風味 大蒜風味薄荷風味此，開發(fā)了具有菠蘿、大蒜、薄荷風味的三種干乳酪產(chǎn)品，承受排序檢驗方法，20名評價員對這三種產(chǎn)品的寵愛程度進展排序。收集20位評級員的檢驗結果，將排在最寵愛位置評價員菠蘿風味大蒜風味薄荷風味評價員菠蘿風味 大蒜風味薄荷風味排序 排序1213112132213123123321131234123141235123152136132163217123171238132182139132193121012320123TkTk排序和之差菠蘿風味ABCC-AC-BB-A33365118153再按下式計算：12 (T)2

12(332362512)2

k [3N(K1)]

2034

32049.3其中KNT—排序和，自由度為K〕查閱x2臨界值表〔具體的見圖片：最左列自由度，概率0.05對應的臨界值為5.99由于實際計算值大于表中臨界值，故樣品排序位置有差異，即寵愛程度有差異?！布僭O消滅x2樣品寵愛程度一樣，此時，不需要進展〔4〕的計算〕計算最小顯著性排序差差異值〔LSD〕NK(K1)/620NK(K1)/620346由于C-A和C-B12.4，說明薄荷風味干酪與菠蘿風味干酪、薄荷風味干酪與大蒜1而薄荷風味干酪不受寵愛，而菠蘿風味和大蒜風味寵愛程度一樣〔由于排序和差為3，未大于12.，即同樣寵愛這兩種產(chǎn)品。生產(chǎn)商可以考慮開發(fā)菠蘿風味和大蒜風味的產(chǎn)品。3、試驗三承受性檢驗法評估兩種品牌巧克力的承受程度〔1〕2以例如說明數(shù)據(jù)處理的方法：評價員競爭性產(chǎn)品自由產(chǎn)品差異值DD212022242181911319評價員競爭性產(chǎn)品自由產(chǎn)品差異值DD21202224218191131917-2442218-416517214166202339719190081620416921221110192011差值的平均值10/10=1D2之和68推斷兩個樣品之間在消費者承受程度上是否差異，由于評分選項有9個〔極端寵愛~極端厭惡2個，因此承受t方法一：手工計算處理數(shù)據(jù)A、先計算t統(tǒng)計值式中：n-測量次數(shù)〔此例中，n=10〕B、查閱t分布表〔見另發(fā)的圖片〕查閱自由度〔df=評價員數(shù)-1=9〕和雙側檢驗顯著性水平〔0.05〕下的臨界值:2.2621C、比較計算值與臨界值：1.24<2.2621，由于計算值小于臨界值，得出：兩個樣品的消費者承受程度沒有差異，承受程度一樣?！?〕是否受到消費者的承受6excel軟件處理：將評價結果數(shù)據(jù)輸入excel中，點擊工具欄中的“數(shù)據(jù)t檢驗在消滅的對話框中，點擊現(xiàn)以下圖：

A列數(shù)據(jù)，同上，再選取B列數(shù)據(jù)，之后出t統(tǒng)計值為-1.20678，t雙尾臨界值〔之所以看雙尾臨界值而不是單尾臨界值，是由于我們不清楚例如中檢驗的兩個樣品哪個更甜〕為2.100922，