Table 4.--GENERAL STATISTICS FOR OPERATING MANUFACTURING ESTABLISHMENTS, BY INDUSTRY GROUPS: 1950, 1949, AND 1947 (Money figures and man-hours are in THOUSANDS. Only selected sample error percentages are shown; standard errors of the other general statistics estimates for an industry group are usually of the same general magnitude as the standard errors shown for employment and value added.)

Excludes employees separately reported at central administrative office and auxiliary establishments. In 1949 there were 313,000 such employees (see table 2). The averages for 1950 and 1949 are based on employment reported for the four pay periods ending nearest the 15th of March, May, August, and November. For 1947, an average based on the mid-month employment for 12 months was used.

2Value of products less cost of materials, supplies, fuel, electric energy, and contract work.

3The percentage standard errors shown in this column indicate the differences that can be expected between the estimates and comparable complete canvass totals, because of sampling fluctuations. The estimates will differ from the complete totals by less than: (1) the pers centage shown: approximately 2 times out of 3. (ii) Twice the percentage shown: approximately 19 times out of 20. (if) Three times the percentage shown: almost always.

There is some undercoverage in the 1949 sample for this major industry group, especially in the logging industry (Industry 2411). Total employment for the establishments not sampled in Major Group 24, is estimated at less than 5 percent.

5Data for 1950 and 1949 for Industry 2421 are not strictly comparable with 1947. In 1947, sawmills that produced less than 200,000 board feet of lumber were required to report only lumber production and lumber stocks; whereas in 1950 and 1949 all items covered by the survey were collected and tabulated for this group of establishments. It is estimated that the mills producing less than 200,000 board feet account for

Table 5.-GENERAL STATISTICS FOR OPERATING MANUFACTURING ESTABLISHMENTS (Money figures and man-hours are in THOUSANDS. Only selected sample error percentages are shown; general magnitude as the standard errors shown for employment and value added.)

Swithheld because the estimate did not meet publication standards on the basis of consistency review. The total for the South Atlantic Division, however, includes this figure.

1The averages for 1950 and 1949 are based on employment reported for the four pay periods ending nearest the 15th of March, May, August, and November. For 1947, an average based on the mid-month employment for 12 months was used. The figures do not include employees rep rted separately at central administrative offices and auxiliary establishments. Based on the Old Age and Survivors Insurance program reports, there were 313,000 such employees in the United States in 1949 (see table 2) with taxable pay rolls for the first quarter of 1949 of $317.8 million, for an approximate annual total of $1,271 million. OASI program data for 1950 were not available for this publication.

2Value of products less cost of materials, supplies, fuel, electric energy, and contract work.

3The percentage standard errors shown in this column indicate the difference that can be expected between the estimates.

(1) The percentage shown: approximately 2 times out of 3
(ii) Twice the percentage shown: approximately 19 times out of 20
(iii) Three times the percentage shown: almost always

The data for North Dakota and South Dakota have been combined because of the high standard errors associated with 1949 and 1950 estimates for each State.