A psychological test was given to 92 teenage boys and 68 teenage girls. The test was used to assign a score to each teenager, measured on the ‘worry scale’–0(not worried) to 100 (very worried).A summary of the results is given in the table below.

Question

A psychological test was given to 92 teenage boys and 68 teenage girls. The test was used to assign a score to each teenager, measured on the ‘worry scale’–0(not worried) to 100 (very worried).A summary of the results is given in the table below.

Score on ‘worry scale’
Choose the option that gives,to two decimal places,the estimated standard error (ESE) of the difference between the sample means for girls and boys.

A 1.40
B 1.65
C 1.73
D 1.98
E 2.00
F 2.06

Answer 1

(Standard Error of the mean) SEm = SD/√(n-1)

However, no SD (Standard Deviation) has been given, because the summary of results would not copy and paste.