What is the critical value
Suppose a t- test is being applied to find out if the population monthly expenditure mean is less than $212. The level of significance selected is 1% and 26 accounts are sampled. What is the critical value?
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scientist does n ot believe that water ph is 7. she wants to test the null hypothesis that the true level of ph is 7 at the .05 significance level. her alternative hypothesis is that the water does not have a ph of 7. which p-value will she reject
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Which interval is wider? If convenient, use technology to construct the confidence intervals. A random sample of 37 gas grills has a mean price of $644.30 and a standard deviation of $56.50.
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Does the sample data indicate that the mean account balance has declined from this value? Hint: Use hypothesis testing. What is the p-value? Will the Null hypothesis be rejected at significance level of 1%, 2% 5% or 7%?
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