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An exam consists of 44 multiple-choice questions. Each question has a choice of five answers, only one of which is correct. For each correct answer, a candidate gets 1 mark, and no penalty is applied for getting an incorrect answer. A particular candidate answers each question purely by guess-work.
Using Normal approximation to Binomial distribution with continuity correction, what is the estimated probability this student obtains a score greater than or equal to 10?
At the 0.10 significance level was the sample result different from the usual pattern? Show how to plug this in megastat and if it is chi square or anova.
the scores on a hypothetical vocabulary test of a group of 20 year olds and a group of 60 year olds are shown below20
Costs of Televisions Listed below are prices (in dollars) and quality rating scores of rare-projection televisions (based on data from Consumer Reports). All of the televisions have screen sizes of 55 in or 56 in.
The exercise problem the following information to figure prevalence and incidence rate:
The Kruskal-Wallis rank test is a nonparametric replacement - The Wilcoxon rank sum test tests a null hypothesis
Find a z score for which the area under the standard normal curve from -z to z is 50%. (b) Find the range of scores which will be assigned a grade of C.
suppose x is a discrete random variable with probability distributionx01fx1-ppin other words x is a bernuolli random
A manufacturing process makes items whose weights are normally distributed. It is known that 22.57% of all the items made weigh between 100 grams up to mean and 49.18% weigh from the mean up to 190 grams. Find out the standard deviation.
last year a trial survey found that 65 of houses in morrisey township had a computer. a follow-up survey wants to find
The population standard deviation was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval for the population mean?
If alpha level is changed from a = 0.05 to a = 0.01. What occurs to boundaries for critical region?
In a few sentences, describe two designs that can address your research question. The designs must involve two different statistical analyses.
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