The accompanying data table lists measured voltage amounts supplied directly to

Question

The accompanying data table lists measured voltage amounts supplied directly to a family's home. The power supply company states that it has a target power supply of 120 volts. Using those home voltage amounts, test the claim that the mean is 120 volts. Use a 0.05 significance level Click the icon to view the sample data Click the icon to view a table of critical t-values What are the null and alternative hypotheses? Ho : = 120 H1 : > 120 B. Ho : -120 H1 : 120 D. Ho : #120 H1 : > 120 A. Ho : #120 H1 : = 120 C. Calculate the test statistic. (Round to three decimal places as needed.) What is the range of values for the P-value? Choose the correct answer below. A. P-value

Explanation / Answer

The statistical software output for this problem is:

One sample T hypothesis test:
: Mean of variable
H0 : = 120
HA : 120

Hypothesis test results:

Hence,

Hypotheses: Option B is correct.

Test statistic = 72.989

P - value < 0.01; Option A is correct.

Critical values = -2.023, 2.023

Conclusion: Reject; Sufficient

Variable Sample Mean Std. Err. DF T-Stat P-value Volt 123.78 0.051788525 39 72.989142 <0.0001

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