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Determine whether the given study is observational or experimental Label each of the following as an observational or experimental study. For the experimental study state the control group and treatment group.
a. A researcher finds that children whose parents smoke have more respiratory illness than children whose parents do not smoke have.
b. A teacher divides her class into two groups. One group is taught a lesson on the computer and the other is taught by traditional lecture. The teacher then gives a test to see that group has better grades.
Determine mean and standard deviation for number of erroneous returns per batch.
A company tracked the number of complaints it received during the first 6 months of last year, as shown in the following table:
Confirm whether given random variable is binomial distribution or not. If this experiment is finished with replacement, explain why.
Criterion of realism or Hurwitz. Assume that the payoff from an investment depends on market conditions. Illustrate what is the criterion of realism value.
For monthly volume of 300 tables, find out total cost, total revenue and profit.
Decision making under risk is the same as decision making under uncertainty because in both the probabilities are unknown.
Find out a 95 percent confidence interval for population mean.
Can we conclude that there is a positive association between the size of the home and the selling price? Use the .05 significance level.
Interpreting confidence interval for the P-value. Give an appropriated response. A weight loss center provided a loss for 72% of its participants.
Make for more scatter plots comparing GDP growth 1970-2000 to corruption, political rights, rule of law, and socio-political instability
Events A and B are mutually exclusive events defined on common sample space. If P (A) 0.5 and P (A or B) = 0.70, determine P (B).
It is better to use the median rather than the mean for a distribution when:
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