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A sample of 145 values is randomly selected from a population with mean equal to 43 and standard deviation equal to 19. (Give your answers correct to one decimal place.) (a) Determine the interval (smallest value to largest value) within which you would expect 99.7% of such sample means to lie. to (b) What is the amount of deviation from the mean for a sample mean of 45.9? (c) What is the maximum deviation you have allowed for in your answer to part (a)?
A farm brings 15 tons of watermelon to market. Find a 90% confidence interval for the population mean cash value of this crop. What is the margin of error?
Of the nine members of the board of trustees of a college, five agree with president on a certain issue. The president selects three trustees at random and asks for their opinions. What is the probability that at least two of them would agree with..
you start with scatterplots and correlation before regression; scatterplots need to be much more refined to be of use; so, you have a relationship - how much of the variation does the model explain and what are the practical conclusions?
Discuss why the nonparametric test was used. In order to do this, you will need to state. What was the Dependent Variable (DV) and at what level was it measured. What was the Independent Variable (IV) and at what level it was measured
What is our decision regarding the differences between the observed and expected frequencies if the critical value of chi-square is 9.488 and the computed value is 6.079?
At a probability of type 1 error of 0.05, test the claim that the assistant professors earn more than $42000 per year. the standard deviation of the population is $5230.
The following table is based on information taken from the Medical Practice Characteristics section of the Statistical Abstract of the United States
What is the probability that the part can be assembled in 7 minutes or less? What is the probability that the part can be assembled between 3.5 and 7 minutes?
What is the importance of pretesting questions and instruments? What are risks of not doing this? Provide an example
Based on these results, a confidence interval for the population mean is found to be u = 5.7 PLUS OR MINUS 4.4. Find the degree of confidence.
Using the results, describe the effect of an outlier or extreme value on the confidence interval.
Calculate the probability that theta hat falls within 0.2 of the theta given the parameter'e true value is 3.0. Calculate the probability of the event asked in Part(a) assuming the sample size is 3 instead of 6.
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