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Q1) Each month National Association of Purchasing Managers publishes NAPM index. One of the questions asked on survey to buy agents is: Do you believe economy is expanding? Last month, of 300 responses, 160 answered yes to question. This month, 170 of the 290 responses indicated they felt economy was expanding. At 0.05 significance level, can we conclude that larger proportion of agents think the economy is expanding this month?
In year 2007 the mean fare to fly from Chariotte, North Carolina, to Seattle, Washington, on a discount ticket was $267. Random sample of round-trip discount fares on this route last month gives:
$321
$286
$290
$330
$310
$250
$270
$280
$299
$265
$291
$275
$281
At 0.01 significance level can we conclude that mean fare has increased? Determine the p-value?
What is the likelihood all four of the selected flights arrived within 15 minutes of the scheduled time?
Based on the Correlation following are Multiple choices question. If the correlation coefficient among two variables is equal to zero, what can be said of the variables X and Y.
Let Y be the number of envelopes for which the machine fails to remove a check. Using the Central Limit Theorem to approximate P{Y≤10}.
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
To find out the alternate hypotheses also critical value. A truck dealer claims where a new model will give trouble free service for at least 15,000 miles.
Determine marginal probability distributions of X and Y . Compute conditional probability P ( Y = 2 | X = 1)
The random variable X has which of the following probability distributions and What is the probability that no student wins
Illustrate for what value does probability XYZ will offer a competing product will ABC be indifferent among the alternatives.
Develop a 95% confidence interval of the difference between the daily population means for the two airports.
Determine the value of correlation coefficient between these 2 variables?
Should Katie conduct a between-subject ANOVA or a within-subject ANOVA? Describe your answer.
There is no proof the new policy is more effective, but we cannot finish the policy has no effect on smog. Interpretation of P-value for the given context.
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