Write down the first even multiple of 9
2 answers:
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Answer:
The answers to the question are;
(a) The psychologist finds that the estimated Cohen's d is __0.562.
(b) The t statistic is 4.12, and r² is ___ 7.322 × 10⁻² .
Step-by-step explanation:
To solve the question, we note the given variables as follows
Sample count N = 49
Mean of sample statistics = = 6.5
Mean of population = μ = 5.8
Sample standard deviation, s = 1.2
The t statistic is given as
t = = 4.08
(a) The Cohen's D is used as an indication of the effect of the size or magnitude of an object.
d is given as
d = =
Where:
M₁ = Group 1 mean = 6.5
M₂ = Group 2 mean = 5.8
=
Where:
s₁ = Standard deviation of group 1 sample = 1.2
s₂ = Standard deviation of group 2 sample
Since the statistics is pooled we can take s₁² = s₂²
Therefore =
=
= s₁
Therefore
d = =
=
= 0.583
However since N < 50 we make use of the correction factor as follows.
Correction Factor =
Therefore,
d = ×
=
×
=
×0.964 = 0.562
Cohen's d = 0.562.
and
(b) To convert d into the coefficient of correlation, r, we have
r = =
= 0.271
r² = 0.07322 or 7.322 × 10⁻².
Answer:
101.85ft
Step-by-step explanation:
We can use tan here