The data in Table 9E.3 are temperature readings from a chemical process in °C, taken every two minutes. (Read the observations down, from left.) The target value for the mean is µ0= 950.
(a) Estimate the process standard deviation.
(b) Set up and apply a tabular cusum for this process, using standardized valuesh= 5 and
Interpret this chart.
|
TABLE 9 E.3 |
|||||||
|
Chemical Process Temperature Data |
|||||||
|
953 |
985 |
949 |
937 |
959 |
948 |
958 |
952 |
|
945 |
973 |
941 |
946 |
939 |
937 |
955 |
931 |
|
972 |
955 |
966 |
954 |
948 |
955 |
947 |
928 |
|
945 |
950 |
966 |
935 |
958 |
927 |
941 |
937 |
|
975 |
948 |
934 |
941 |
963 |
940 |
938 |
950 |
|
970 |
957 |
937 |
933 |
973 |
962 |
945 |
970 |
|
959 |
940 |
946 |
960 |
949 |
963 |
963 |
933 |
|
973 |
933 |
952 |
968 |
942 |
943 |
967 |
960 |
|
940 |
965 |
935 |
959 |
965 |
950 |
969 |
934 |
|
936 |
973 |
941 |
956 |
962 |
938 |
981 |
927 |
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