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.
In a survey conducted immediately after the World Trade Center attack, 47 percent of the women who responded to the survey said they would not treat themselves to small luxuries like manicures and 54 percent said they would not buy any expensive c
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What different levels of organization do environentalist study??
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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