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In a population of 1000 subjects, 720 possess a certain characteristic. A sample of 40 subjects selected from this population has 28 subjects who possess the same characteristic. What are the values of the population and sample proportions?
Population proportion=
Sample proportion =
The supplier claims that no more than 2% of the items in the shipment are defective. Carry out an appropriate hypothesis test and comment on the credibility of the supplier's claim.
A Department of Transportation report about air travel found that airlines misplace about 5 bags per 1000 passengers.
A dividend of $1.50 is payable in one year. If the cost of issuing shares is 2.5% and the rate of return is 16% p.a. effective. How many shares need to be sold?
The Absent Minded Professor study was a RCT, which had an objective to estimate the protective effect of drug "No-Reminder" compared to drug "Reminder" on risk of "Forgetful syndrome". The study found that the drug "No-Reminder" was protective.
what do we mean when we say that a statistical result is significant? what is the difference between a statistically
Refer to Exercise 9.19 (p. 487), in which the extent of retaliation against whistle blowers was investigated. Since salary is a reasonably good indicator of a person's power within an organization, the data of Exercise 9.19 can be used to inve..
For each of the two factors (age at first live birth and age at meno- pause), calculate the generalized odds and give your interpretation. How does this result compare with those in part (a)?
The mean numbers of trials to learn maze for the group with the colrful wallpaper is 11. What is the standard deviation of the distribution of means?
At what point should a new order be placed if the candy store wishes to keep 95% level of service, assume normal demand and the lead time. How much safety stock should be ordered?
She was concerned that the test she wished to perform might have unacceptable large possibilities of Type II error, ß. Which of the following would solve this problem?
An exam consists of 50 multiple choice questions. Based on how much you studied, for any given question, you think you have a probability of 0.67 of getting the correct answer. Consider the sampling distribution of the sample proportion of correct..
This week we're reading across disciplines: history, philosophy, music, art, Europe, America, Asia...welcome to the Humanities. Hence our discussion will focus on influences. How does history, the social movement of time and place, influence art?
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