PGE claims that the mean Rocklin household expenditure for e

PG&E; claims that the mean Rocklin household expenditure for energy was $1177. A recent survey of 10 Rocklin households found that their mean expenditure on energy was $1288 with a standard deviation of $262. Use a 0.1 significance level to test the claim that the mean Rocklin household expenditure for energy is different from $1177 as PG&E; claims. Claim: which corresponds to Opposite: which corresponds to The test is: two-tailed The test statistic is: 1.340 (to 3 decimals) The Critical Value is: +- 1.305 (to 3 decimals) Based on this we: Fail to reject the null hypothesis : Conclusion There does not : appear to be enough evidence to support the claim that the mean Rocklin household expenditure for energy is different from $1177 as PG&E; claims.

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