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Poll of 1000 adults.92% of H.S. degree or less said "certain" or "little doubt". of those with with some college, college grad, and postgrad the percentages for "certain" or "little doubt" were 90, 85 and 77 respectively. the percentages of people in US with no more than H.S., S.C., C.G. and postgrad education are 49, 29, 15 and 7 respectively.
A) probability randomly selected person from US will be a C.G. and be "certain" or "little doubt"?B) probability randomly selected person from US will be "certain" or "little doubt"?C) probability randomly selected person from US who is certain or has little doubt has no more than a H.S. education?
You conduct a hypothesis test and you observe values for the sample mean and sample standard deviation when n=25 that do not lead to the rejection of the null hypothesis (the p value is .0667).
Find the probability that the time taken for a randomly chosen customer to be dealt with by a cashier is more than 180s.
What is 95% confidence interval estimate for average number of years served by all Supreme Court justices?
Repetitions of numbers are not permitted, i.e., the same number cannot be used more than once in a total sequence. As examples, 27, 94 or 55 would not be permitted. How many different code groups can be designed?
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
A presidential candidate's aide estimates that, among all college students, the proportion p who intend to vote in the upcoming election is at least 60%.
Findout either the given correlation is significant at given level of significance. Illustrate what does sample size have to do with the significance of r.
Assume that a random variable, x, is distributed according to a normal distribution with mean 12 and standard deviation 2. Find the z-value if:
Find the value of q-hat from proportion and degrees of freedom used to find the t-score.
Digital Switches, Inc., produces a product called the C3PO with an advertised 0.5% failure rate. Calculate the range within which the population average failure rate can be found with 95% confidence.
If 20 voters are selected at random, and X is the number of voters which support this referendum, determine the mean and variance of X.
Four percent of the customers of a store buy cigars. Half of the customers who buy cigars buy beer and one fourth of those who buy beer buy cigars. The table is given below:
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