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An unfair coin comes up heads 38% of the time. If the coin is flipped 12 times, what is the probability that it comes up heads no more than two times?
The sample proportion and the sample standard deviation are all unbiased estimators of the corresponding population parameters - variance of the standard normal distribution
a) Specify the null and alternate hypotheses for testing that the population correlation is negative. b) Calculate the estimate of the population correlation coefficient between X and Y.
a consumer group rated 12 manufactured products imported from a single source on a scale of 1 to 10. the data are shown
Psychological test. For the sample data, n = 50,mean = 17.3 and S.D = 5.4.USE level of significance = .05. Complete hypotheses testing using P value approach.
In certain normal distribution of scores, mean is 50 and standard deviation is 4. Determine z-score corresponding to a score of 55.
Can we conclude that there is a difference in number of citations written between the officers? Use the 0.05 level of significance.
How many different combinations of the clients could be considered for inclusion into his limited schedule for that day?
Scores on certain nationwide college entrance examination follow normal distribution with mean of 500 and a standard deviation of 100. Determine the probability that student will score?
we calculate a statistical power and find that it is 0.93. this means that if the null hypothesis is we have a chance
let X have one of the following distributions: if the prior probabilities are P(H0)= P(HA) which outcomes favor H0? What prior probabilities correspond to the decision rules with a= 0.2 and a =0.5
the length of conversations between supervisors and workers in a certain manufacturing industry is normally distributed
The weights (in pounds) of a sample of five boxes being sent by UPS are: 12, 6, 7, 3, and 10.
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