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For a study entitled, "Sawdust as a Hollow Block Aggregrate" which of the following questions would you choose as a background research question?
a. What are the different qualities of a good hollow block?
b. What materials are needed to make sawdust aggregated hollow block?
c. Which formulation of sawdust aggregated hollow block is best in terms of strength?
d. What component in sawdust can help make a strong hollow block?
Assuming independence between two variables, find expected frequency for each cell of the table
Why don't researchers who want to test hypotheses about the relationships between variables worry a great deal about random sampling?
The Wall Street Journal reported some interesting statistics on the job market. One statistic is that 40% of all workers say they would change jobs for "slightly higher pay."
a random sample of 144 observations has a mean of 20 a median of 21 and a mode of 22. the population standard deviation
For the population with mean of (u)=50 and standard deviation of (o)=10, how much error on average would you expect between sample mean (M) and population mean for given samples
Given that 800 people were aged between 25 and 40, approximately how many had a systolic blood pressure reading greater than 140 and less than or equal to 150?
Make a decision regarding the null hypothesis based on the sample information. Interpret the results of the test and state your conclusion.
If you have four independent servers, what is the probability that at least one of them is operational?
Does this mean which you can enhance life savings by spending more money? Describe how this correlation is true. How does this apply or could apply to workplace or home?
Find out the best predicted household size given that the household discards 5.00 lb of plastic.
Devise a hypothesis test that determines the presence of poisonous gases. Plot the false alarm and miss probabilities for the test as a function of the decision threshold. Lastly, plot the corresponding receiver operating curve
If you wish to estimate the proportion of engineers and scientists who have studied probability theory and you wish your estimate to be correct
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