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A random sample of six cars from a particular model has the following fuel consumption figure, in miles per gallon: 18, 16, 20, 21, 19, 17. Find a 95% confidence interval for the population mean. Assuming that the population is normal. ( use t-distribution for small sample size).
A (16.54, 20.46)
B (14.56, 19.44)
C (16.32, 21.68)
D (15.32, 20.68)
suppose we roll one die repeatedly and let ni be the number of the roll on which i first appears. find the joint
an airline reports that it has been experiencing a 17 rate of noshow on advanced reservations. among 150 advanced
A doctor suspected that smokers between 40 and 50 with lung disease had been smoking on average more than 20 years - significance level is there sufficient evidence to justify the doctors belief?
Develop a 90 percent confidence interval for the proportion opposing health care changes. (Round your answers to 4 decimal places.)
How is data screening related to the assumptions of the statistic you will choose to analyze your data?
a random sample of size n is to be used to test the null hypothesis that the parameter theta of an exponential
a sample of 60 women is obtained and their heights in inches and pulse rates in beats per minute are measured. the
Perform exploratory data analysis on CreativityPre and CreativityPost. Using SPSS, calculate the mean and standard deviation of these two variables.
The number customers who enter a supermarket each hour is normally distributed with a mean of 600 and a standard deviation of 200. The supermarket is open 16 hours per day.
1. an srs of size 10 is drawn from a population that has a normal distribution. the sample has a mean of 111 and a
What is the probability of randomly selecting a male from this group?
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