BE HONEST: DO NOT
MAKE UP DATA. PRESS
THE MEMO or MEMORY
BUTTON ON YOUR DEVICE
NHS Health PEDOMETER P
AND ENTER YOUR DATA
EXACTLY AS IT APPEARS
PEDOMETER DATA:
NUMBER OF STEPS
PEDOMETER TYPE:
STUDENT INITIALS "new" or "old" SAT 4-2
M.P. new 1258
A.S new 0
A.N. new 0
S.S new 4034
S.S. new 4104
J.B. new 1175
D.T. new 0
M.H. new 3021
M.L. new 5440
M.R old 1264
M.S. old 28721
V. R. old 1834
M.T. old 0
T.A. old 1629
J.T old 6789
V.A. old 2413
R.R. old 25721
J.G. old 0
A.T. old 2794
M.L old 3388
CHI SQUARE TEST FOR GOODNESS OF FIT
NULL: THE DISTRIBUTION OF STEPS IS SAME FOR EACH DAY
ALTERNATIVE: THE DISTRIBUTION OF STEPS IS DIFFERENT
J.B. observed counts 1175
expected counts 12211.2
Chi- Sqare: (O-E)^2/E 9974.262189
Chi Sqare test statistic : 841649.8852
degrees of freedom: 9-1=8
p-value: 0
Since the p value is low we have evidence to reject the null, and conclude one takes a different num
2 sample t test for mean difference (OLD - NEW pedometer)
Null: mu(old) = mu(new)
Alternative: mu(old) NOT= mu(new)
conditions: 2 independent SRS; normal populations
summary statistics for Fri 2-8-2011
old pedometer usb(new) pedometer
sample mean 8416.8 4179.8
sample standard deviation 8914.5 3413.4
sample size 11 9
t test statistic: 1.45
p-value: .17
degree of freedom: 13.4
Conclusion: since the p-value is high (>alpha = .10) we fail to reject the null
hypothesis; we can not conlude that users of usb pedometers have different
step counts from users of regulare pedometers.
ealth PEDOMETER PROJECT 2011
SUN 4-3 MON 4-4 TUES 4-5 WED 4-6 THURS 4-7
730 544 815 1122 1326
922 1449 1260 2054
0 0 7188 10913 10768
249 4104 0 6214 764
0 0 764 1462 2255
5771 14133 16125 33325 15532
0 0 3568 4578 3121
328 6167 5490 9902 5672
4600 6019 5524 2870 6830
2085 6507 9339 4489 9123
10867 18789 15872 17889 18568
2152 2020 1948 1330 1568
2657 47 119 3324 363
2269 1002 364 412 7698
6437 5716 5688 9919 6548
2282 1172 1434 1993 1284
12867 19798 17888 27508 19818
3320 2927 5417 3722 8603
3567 4219 2354 4113 5678
5201 1805 1342 1721 5012
5771 14133 16125 33325 15532
12211.2 12211.2 12211.2 12211.2 12211.2
3396.5684 302.4530955 1254.408284 36506.85849 903.0818134
ject the null, and conclude one takes a different number of steps a day.
FRI 4-8 SAT 4-9 SUN 4-10 TOTAL # STEPS MEAN # STEPS
5237 3352 0 14384 1598.222222
1314 1565 2658 11222 1402.75
8545 8696 6048 52158 8693
924 1014 897 18200 2022.222222
5084 3821 0 17490 1943.333333
2905 11578 9357 109901 12211.22222
2578 4047 4108 22000 2444.444444
10293 12892 8403 62168 6907.555556
738 0 3998 36019 4002.111111
9562 7982 11754 62105 6900.555556
19251 27650 13527 171134 19014.88889
2027 1743 1305 15927 1769.666667
953 2571 1528 11562 1284.666667
8025 2266 2349 26014 2890.444444
7895 2554 1069 52615 5846.1111
733 3117 1125 15553 1728.111111
30124 30678 13527 197929 21992.11111
3196 3548 0 30733 3414.777778
4098 8407 3529 38759 4306.555556
6721 3565 4001 912 101.3333333
2905 11578 9357 109901
12211.2 12211.2 12211.2 12211.2
7092.288918 32.83397537 667.1299823 781520
STANDARD
DEVIATION # DAYS USED
1649.470732 8
779.6817574 7
1924.421368 6
2186.824226 8
1971.901937 6
9580.305668 9
1921.962806 6
3888.415651 9
2365.347355 8
3599.041925 9
5881.439183 9
308.546998 9
1287.268523 8
2753.353717 9
2650.89421 9
768.2796438 9
6775.067296 9
2613.782354 7
1803.987327 9
1814.583431 9