Folate is the general term for water soluble B vitamin. Lack of the vitamin may
ID: 3048770 • Letter: F
Question
Folate is the general term for water soluble B vitamin. Lack of the vitamin may lead to anaemia. Three groups with increasing levels of fitness were tested with the following results. Does fitness help to improve folate levels? Data are parametric. Use SPSS to assist in reaching your conclusion – no hand calculations are needed. Group 1- low fitness Red cell folate (nmol/L) 243 251 275 291 347 354 380 392 n = 8 Group 2 – intermediate fitness Red cell folate (nmol/L) 206 210 226 249 255 273 285 295 309 n = 9 Group 3 – high fitness Red cell folate (nmol/L) 241 258 270 293 328 n = 5
What kind of test would we perform?
Explanation / Answer
Answer:
Folate is the general term for water soluble B vitamin. Lack of the vitamin may lead to anaemia. Three groups with increasing levels of fitness were tested with the following results. Does fitness help to improve folate levels? Data are parametric. Use SPSS to assist in reaching your conclusion – no hand calculations are needed. Group 1- low fitness Red cell folate (nmol/L) 243 251 275 291 347 354 380 392 n = 8 Group 2 – intermediate fitness Red cell folate (nmol/L) 206 210 226 249 255 273 285 295 309 n = 9 Group 3 – high fitness Red cell folate (nmol/L) 241 258 270 293 328 n = 5
What kind of test would we perform?
Since we are comparing more than 2 groups, ANOVA to be performed.
SPSS output:
Descriptives
Red cell folate
N
Mean
Std. Deviation
Std. Error
95% Confidence Interval for Mean
Minimum
Maximum
Lower Bound
Upper Bound
low fitness
8
316.6250
58.71709
20.75963
267.5363
365.7137
243.00
392.00
intermediate fitness
9
256.4444
37.12180
12.37393
227.9101
284.9788
206.00
309.00
high fitness
5
278.0000
33.75648
15.09636
236.0858
319.9142
241.00
328.00
Total
22
283.2273
51.28439
10.93387
260.4890
305.9655
206.00
392.00
ANOVA
Red cell folate
Sum of Squares
df
Mean Square
F
Sig.
Between Groups
15515.766
2
7757.883
3.711
.044
Within Groups
39716.097
19
2090.321
Total
55231.864
21
Calculated F=3.711, P=0.044 which is < 0.05 level. Ho is rejected.
There is significant difference in folate levels between the three fitness level groups.
Descriptives
Red cell folate
N
Mean
Std. Deviation
Std. Error
95% Confidence Interval for Mean
Minimum
Maximum
Lower Bound
Upper Bound
low fitness
8
316.6250
58.71709
20.75963
267.5363
365.7137
243.00
392.00
intermediate fitness
9
256.4444
37.12180
12.37393
227.9101
284.9788
206.00
309.00
high fitness
5
278.0000
33.75648
15.09636
236.0858
319.9142
241.00
328.00
Total
22
283.2273
51.28439
10.93387
260.4890
305.9655
206.00
392.00