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In a study of human blood types in nonhuman primates, a sample of 71 orangutans were tested and 14 were found to be blood type B. Construct a 95% confidence interval for the population proportion of blood type B in the orangutan population.
What is the 95% confidence interval for the true mean length of the bolt?
Pretend you are in charge of a packaging equipment company that is filling boxes of cereal. From past experience we know the population's mean weight of the filled boxes is 300 grams (and we know the distribution of grams is approximately normal).
To test productivity quickly, he has his shift foremen record number of defective T-shirts made in randomly sampled week. Critical Value: t =Test Statistic (Show procedure.): t =?
An American put option to sell a swiss franc for dollars has a strike price of $0.80 and a time to maturity of one year. The volatility of the swiss franc is 10%
If the population standard deviation is σ = 20 is the 6 point effect large enough to be statistically significant? Use the two - tailed test with α = .05
One should never use a regression line to predict the dependent response variable when the independent value is outside of the data range of the original data set that was used to fit the line.
A sample of n= 16 scores has a mean of M = 45 and SS = 960. Calculate the sample standard deviation (s) and the estimated standard error for the sample means (SM).
The field of statistics can be roughly subdivided into two areas: descriptive statistics and probability.
The population of SAT scores forms a normal distribution with a mean of µ=500 and a standard deviation of o =100. If the average SAT score is calculated for a sample of n=25 students,
If we assume all the possible random samples of 250 students at this university, 95 percent of the samples should have means among what two numbers.
The probability of contracting the kissing disease is .23 when one is exposed to a certain provocative environment. Sixty people are so exposed. What is the probability that no more than 10 are infected with this dreaded disease.
Find the area under the normal distribution curve to the right of z = -1.03.
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