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Owner: rapp.gina
Created: Dec 2, 2018
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LAB# 9
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1.) Yes, the samples are from a normally distributed population.

2.) Yes, there is enough evidence that the mean before the medication was given there response are greater than 600 ms ( mean: 640).

3.) Yes, there is enough evidence to prove that before the medication was given the response time was higher (mean:640). After the medication was given the response time is lower (mean: 548).

4.) Ys, there is enough evedince to indicate that variability of auditory response is improved because the standard error went down from 13.31 to 7.79

5.) It is unsually low compare to 99%. 

121/125=0.968=97%

according to this value they missed 3% compare to 1%.

6.) No, there is evidence that the response time is lower than the average 386 VS 440.

7.) Yes, there is enough evidence that the medication is improving visual response time.

Result 1: QQ Plot   [Info]
Right click to copy

Result 2: One sample T hypothesis test   [Info]
One sample T hypothesis test:
μ : Mean of variable
H0 : μ = 440
HA : μ ≠ 440

Hypothesis test results:
VariableSample MeanStd. Err.DFT-StatP-value
Vis-Before385.540327.6389944123-7.1291684<0.0001
Vis-After356.822585.9971368123-13.869522<0.0001

Result 3: Two sample T hypothesis test   [Info]
Two sample T hypothesis test:
μ1 : Mean of Aud-Before
μ2 : Mean of Aud-After
μ1 - μ2 : Difference between two means
H0 : μ1 - μ2 = 600
HA : μ1 - μ2 ≠ 600
(without pooled variances)

Hypothesis test results:
DifferenceSample Diff.Std. Err.DFT-StatP-value
μ1 - μ291.87252915.41853194.24251-32.955637<0.0001

Result 4: Two sample variance hypothesis test   [Info]
Two sample variance hypothesis test:
σ12 : Variance of Aud-Before
σ22 : Variance of Aud-After
σ1222 : Ratio of two variances
H0 : σ1222 = 1
HA : σ1222 ≠ 1

Hypothesis test results:
RatioNum. DFDen. DFSample RatioF-StatP-value
σ12221201242.82556982.8255698<0.0001

Result 5: One sample T hypothesis test   [Info]
One sample T hypothesis test:
μ : Mean of variable
H0 : μ = 600
HA : μ ≠ 600

Hypothesis test results:
VariableSample MeanStd. Err.DFT-StatP-value
Aud-After548.1447.7885499124-6.6579787<0.0001
Aud-Before640.0165313.3067491203.00723570.0032

HTML link:
<A href="https://www.statcrunch.com/5.0/viewreport.php?reportid=82587">LAB# 9</A>

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