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The security department of a state university is planning its budget for the next year. In estimating the man-hours for security during university sponsored music concerts, the average length of music concerts is needed. A random sample from thirty-six security departments at universities was taken and the sample mean length of concerts was 160 minutes. Suppose the population standard deviation is 45 minutes. A 95 percent confidence interval for the true mean duration of music concerts is for this one I came up with 2 solutions 147.63 to 172.37 and when doing it over to check i got 145.3 to 174.7
A random sample of eight adults aged 30 years were asked how much they spent on medical costs in the year 2011. The following data were measured. Compute the sample standard deviation.
A recent study found that the average life expectancy of a person living in Africa is 53 years with a standard deviation of 7.5 years. If a person in Africa is selected at random
How would you find the normal approximation to the binomial probability P(x = 5) in part A? Please show how you would calculate u and standard deviation in the formula for the normal approximation to the binomial
You're not sure if you should buy a stock and need to discover the probability of the stock having a positive return (based on one year).
The impact of campaign film on attitudes toward a political candidate was investigated. Prior to showing the film, the attitudes of 15 people toward the candidate were assessed using a political likability scale.
If there are repeated independent trials and there are only two outcomes, what distribution should be used?
The incarceration rate in one nation's prisons was 965 per 100,000 male residents, and 65 per 100,000 female residents.
Strongly support, support, no opinion, do not support, strongly do not support. The number of people in each category was recorded.
Using a one-sided hypothesis test with a 90% confidence level, which of the following statements do these data support?
The first step in this assignment is to provide SPSS with the Value Labels for the values in LOCALE97.
Assume that you have selected 10 students enrolled at your college and have collected data for these three variables:
Suppose in an attempt to develop marketing materials Tyco marketers are interested in determining whether there is a significant difference in the cost of replacing pipeline seals in different countries.
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