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An election coming up next week promises to be very close. In fact, assume that 50% are in favor and 50% are against. Suppose you conduct a poll of 791 randomly selected likey votes. Approx. how different will the percent in favor (from the poll) be from the 50% in the population you are trying to estimate?
Explain these results to a person who understands the t test for a single sample but knows nothing about the t test for independent means.
A savings account was opened for a baby on 1985 with a $100 deposit. No withdrawals or deposits occurred since the account was opened. The current balance of the account is $246.47. Measured in dollars of the year in which the account was opened, how..
The sample data are summarized by the statistics n = 27, x = 4.6 years, s- 1.9 years.
Create a 95% confidence interval for the population mean days absent for sickness based on this sample. Select the answer closest to your results.
If one item is chosen at random, determine these probabilities. It is a TV
Make a graph to visualize the problem and state, without doing the calculations, whether the p-value of the test
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}.
I survey 50 potential consumers regarding their interest in the product, 34 express an interest in purchasing it. The maximum price each would be willing to pay is shown below.
Do the data indicate a significant difference? Test with ∝ = .05.
At the .01 significance level, is there a difference in the use of the four entrances?
First-order regression model was fit to data. Part of printout follows?
For the data shown below, prepare a x-bar chart. Note that the sample size is three. Record the values for the UCL, center line, and LCL. In addition, note any points that are out of control.
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