Question

1. Mental measurements of young children are often made by giving them blocks and telling them to build a tower as tall as possible. One experiment of block building was repeated a month later, with the times (in seconds) listed in the accompanying table (based on data from \"Tower Building\", by Johnson and Courtney, Child Development, Vol.3). The previous experiment shows that the times are normally distributed. Use a 0.01 level of significance to test the claim that there is no difference between the two times. Child A B C D E F G H I J K L M N O First Trial 30 19 19 23 29 178 42 20 12 39 14 81 17 31 52 Second Trial 30 6 14 8 14 52 14 22 17 8 11 30 14 17 15 Solve first for the mean and standard deviation first. Use the standard deviation formula with n-1 as the denominator. a. Claim (in symbolic form): Ho: Ha: b. level of significance: test-statistic: tail of distribution: c. Decision Rule: Reject Ho if d.Computation e. Decision (Reject Ho or Failed to reject Ho) f. Conclusion

          1. Mental measurements of young children are often made by giving them blocks and telling them to build a tower as
tall as possible. One experiment of block building was repeated a month later, with the times (in seconds) listed in
the accompanying table (based on data from \"Tower Building\", by Johnson and Courtney, Child Development,
Vol.3). The previous experiment shows that the times are normally distributed. Use a 0.01 level of
significance to test the claim that there is no difference between the two times.
Child
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
First Trial
30
19
19
23
29
178
42
20
12
39
14
81
17
31
52
Second Trial
30
6
14
8
14
52
14
22
17
8
11
30
14
17
15
Solve first for the mean and standard deviation first. Use the standard deviation formula with n-1 as the
denominator.
a. Claim (in symbolic form):
Ho:
Ha:
b. level of significance:
test-statistic:
tail of distribution:
c. Decision Rule: Reject Ho if
d.Computation
e. Decision (Reject Ho or Failed to reject Ho)
f. Conclusion

1. Mental measurements of young children are often made by giving them blocks and telling them to build a tower as
tall as possible. One experiment of block building was repeated a month later, with the times (in seconds) listed in
the accompanying table (based on data from T̈ower Building,̈ by Johnson and Courtney, Child Development,
Vol.3). The previous experiment shows that the times are normally distributed. Use a 0.01 level of
significance to test the claim that there is no difference between the two times.
Child
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
First Trial
30
19
19
23
29
178
42
20
12
39
14
81
17
31
52
Second Trial
30
6
14
8
14
52
14
22
17
8
11
30
14
17
15
Solve first for the mean and standard deviation first. Use the standard deviation formula with n-1 as the
denominator.
a. Claim (in symbolic form):
Ho:
Ha:
b. level of significance:
test-statistic:
tail of distribution:
c. Decision Rule: Reject Ho if
d.Computation
e. Decision (Reject Ho or Failed to reject Ho)
f. Conclusion

Added by Kyle C.

Question

Please give Ace some feedback