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The theorem that states that the sampling distribution of the sample mean is approximetly normal when the sample size n is reasonably large is known as the
Calculate the t test statistic. Can you reject ρ = 0? (e) Use Excel's function =TDIST(t,deg_freedom,tails) to calculate the two-tail p-value.
let the number of trials be n = 3, and let the probability of success be p = 0.0228. Use a calculator to compare:
Describe and perform the five-step hypothesis test process: set up the hypothesis, select a level of significance, establish the decision rule, calculate the test statistic, and draw conclusion.
suppose that scores on the math sat exam follow a normal distribution with mean 500 and standard deviation 100. two
Construct a sample space using a tree diagram - Which of the following three sets of probabilities are inappropriate because they violate a basic rule of probability
State the formula for the test statistic and show your decision rule using the 1 percent level of significance. (c) Carry out the test. Show your work. (d) What assumptions are required?
How large should the sample size be if she wishes to be accurate within $0.10. A previous study showed that the standard deviation of the price was $.12.
Survey of 16 tax returns reports families with incomes between $75,000 and 100,000 have on average $8,562 in Standard Deductions with the standard deviation of $1,800.
Is there sufficient evidence at the alpha =0.05 level to support the researcher's claim?
Can you conclude that every one-bedroom apartment costs less than every two-bedroom apartment? Which is more useful to someone planning to rent an apartment, the confidence interval or the significance test?
a client gives you a data set of 30 observed values that represent the number of gallons of gas that 30 individual
business needs to be at least $8 million dollars in annual sales before expansion could be considered. The following is data for the past 6 years. What should the owner's decision be regarding expansion in 2010?
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