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1. It is claimed that two of three Americans say that the chances of world peace are seriously threatened by the nuclear capabilities of other countries. If in a random sample of 400 Americans, it is found that only 252 hold this view, do you think the claim is correct? Use α = 0.05. State any assumptions you make in solving this problem.
2. According to the Bureau of Labor Statistics (1996), the average price of a gallon of gasoline in all U.S. cities in the United States in January 1996 was $1.129. A later random sample in 24 cities found the mean price to be $1.24 with a standard deviation of 0.01. Test at α = 0.05 to see whether the average price of a gallon of gas in the cities had recently changed.
the acceptable level for insect filth in a certain food item is 4 insect fragments per 10 grams. a sample random of 50
The confidence interval must be less than 5 percentage points i.e. the confidence interval should extend at most 2.5 percentage points above and below the sample proportion?
How do you set up SPSS to find descriptives for the perceived learning variable for each gender?
Listed below are altitudes (thousands of feet) and outside air temperatures(degrees Fahrenheit) recorded by the author during Delta Flight. is there sufficient evidence to conclude that is a linear correlation between altitude and outside air temp..
Assume we have three different samples each comprised of 20 different jurisdications. Our objective is to compare the seriousness of juvenile substance abuse across all the samples.
because the ta distribution is based on hundreds of students we are willing to regard it as a fixed probability
transrail is bidding on a project that it figures will cost 400000 to perform. using a 25 markup it will charge 500000
What are the minimum and the maximum starting salaries of the middle 95% of the LU graduates?
Estimate the proportion of infants whose mothers experienced toxemia during pregnancy. Use 95% confidence level and doctors think that more than 20% of the infants their mothers experienced toxemia. Is that correct?
Particular cookie will have fewer than 5. What type of probability distribution will most likely be used to analyze the number of chocolate chips per cookie?
Find out the confidence interval for the population mean also interpret the result. A researcher is interested in whether social assertiveness might be influenced by training procedures.
identify at least one example of probability encountered in everyday life.explain how probability is used in that
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