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There are 3 coins in a box. The probability of getting head is 2/3 for two of them, while for remaining it is 1/2. A coin is chosen at random and tossed 3 times, showing head in each case. What is the probability that the coin is unbiased?
If population standard deviation is σ = 8 is effect large adequate to be statistically significant? Use two - tailed effect with α = .05
Consider a large population of families with three children each. If the genders of children in any family are independent of one another, the number of male children in any family will have a binomial distribution based on three trials.
Determine SSE, SS (Total) and the explained sum of squared variation SSR and find the estimated y intercept slope and write the regression equation.
What maximum variance of the raw score population could you have and still be able to reject the null hypothesis of μ = 20 (α = .05), if the sample size is 100 and the sample mean is 22?
Find a 90% confidence interval for the population mean if the sample mean is 1250 with a sample standard deviation of 35 for a sample of 20.
SmartPeople is an organization that only admits people with IQ's in the top 98 percentile. What IQ score would a person need to be a member of SmartPeople?
Random sample of 40 November days (taken over many years)? Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places.
How is the rejection region defined and how is that related to the z-score and the p value? When do you reject or fail to reject the null hypothesis?
In a standard test for reaction time, female candidates for flight school are found to have times that are normally distributed with a mean of 0.65 seconds and a standard deviation of 0.15 seconds.
If the same sample results had been obtained from a random sample of 16 students, could the students' claim be accepted at a lower level of significance?
We are establishing a quality control program for a process and need to establish the mean and standard deviation for the process. The first 10 batches had samples of size 5 taken.
True or False? Bivariate correlation coefficient always has same sign as b 1 in Y = b 0 + b 1 X.
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