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A study was conducted to determine if there was a difference in the humor content in British and American trade magazine advertisements. In an independent random sample of 270 American trade magazine advertisements, 56 were humorous ads. Does this data provide evidence at the .05 significance level that there is a difference in the proportion of humorous ads in British versus American trade magazines?
If random samples of size of 75 is selected, the standard error of the proportions of student in the sample, who are minority students is
Assume that each shipment contains a random sample of bearings. a. What is the probability that a given shipment is acceptable?
You can allow the cup to overfill 4% of the time. What amount should you set as the mean amount of coffee to be dispensed?
Can college conclude that students in new program are significantly different from rest of freshmen class? Use two - tailed test with a = 0.05.
At the significance level 0.01 is there sufficient evidence to conclude that a difference exists in the mean time required for the elimination of the rash?
Assuming that the population standard deviations are the same, perform a two independent samples t-test on the hypotheses Null Hypothesis: μ1 = μ2, Alternative Hypothesis: μ1 ≠ μ2. What is the test statistic and p-value of this test?
Determine the calculated value of the test statistic? What distribution does test statistic have when null hypothesis is true?
The payouts for the Powerball lottery and their corresponding odds arean probabilities of occurrence are shown below. The price of a ticket is $1.00. Find the mean and standard deviation of the payout.
You will actually have negative sales using this multiple regression analysis
In standardized form, the normal distribution a) Has a mean of 0 and a standard deviation of 1 b) Has a mean of 1 and a variance of 0 c) Has an area equal to 0.5 d) Cannot be used to approximate discrete probability distributions
Test the significant difference between Chi-square for attributes
What can we say about the form or way of the distribution of the average or median of the sample?
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