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The Department of Transportion (DOT) is attempting to determine the proportion of drivers who require all passengers in the car to wear their seatbelt before putting the vehicle in drive. A survey of 82 drivers is performed and 45 people say they will not drive until all passengers in the vehicle are buckled up. To report their finding they want to create a 90% confidence interval. What would be the margin error for this confidence interval?
1) 0.0100
2) 0.0050
3) 0.0901
4) 0.0703
5) 0.0550
what is the post-test probability of disease being present in a patient with a positive test result for test A if a cutoff value of 4.0 mg/ml is chosen?
In testing the difference between two means from two independent populations, the sample sizes do not have to be equal to be able to use the Z statistic.
Elucidate the null and alternative hypothesis for the difference among the two means. In testing the difference between the means of two.
Is there evidence to suggest that the training course helps out sales people?
Report descriptive statistics, assumptions tests, effect sizes (partial eta) as well as tests of statistical significance.
Formulate an appropriate hypothesis test to examine at the 10% level of significance whether the manager's worries are justified.
Is it sensible to conclude that this set of n=16 people is not representative random sample of registered voters?
The chi-square goodness of fit test can be used when we:
Roger has read a report that the weights of adult mail Siberian tigers have a distribution which is approximately normal with mean μ = 390 lb and σ = 65 lb
The following table shows the number of miles driven in each trial.
Determine the probability that employee will make 28 or more sales during 100-call shift? Allocate a Random Variable x.
Book inventory Record information - Ratio, interval, nominal or ordinal.
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