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An urn contains 16 balls of which 5 are red. if we select 1 ball, what is the probability that a red ball will be chosen? If we randomly select 5 balls with replacement, what is the probability distributon of x-the neumber of red balls in the sample?
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Estimate the value of the population proportion.
Construct a decision table for this problem. Include all conditional values and probabilities in the table.
a) yes, because the tst value -3.46 falls in the noncritical region. b) no, because the test value -1.98 falls in the critical region. c) yes, becasue the test value -3.46 falls in the critical region. d) no because the tst value -1.98 falls in the n..
Heights are sampled of kids from three schools. Using a 0.05 significance level, if when looking at ANOVA results, your p-value is 0.04, what can you say about your sample data? no minimum word count.
Define and mention characteristics of normal probablity curve, Distinguish a group of 500 people into three groups assuming that the attribute of grouping is normally distributed.
On a test, a sample of 5 students has a mean score of 78. The scores of four students of them are: 87, 81, 76, 53. Find the test score of the fifth student and standard deviation of this sample.
P(A 1 )= .20, P(A 2 ), and P(A 3 )= .40. P(B 1 I A 1 ) = .25. P(B 1 I A 2 ) = .05. P(B 1 I A 3 )=.10. Use Bayes' theorem to determine P(A 3 I B 1 )
A sample of n observations is taken from a population. When performing statistical inference about a population variance, the appropriate chi-square distribution has:
People were polled on how many books they read the previous year. How many subject are needed to estimate the number of books read the previous year within one book with 99% confidence?
It is suspected that high pollution levels (measured by number of particulates found in the air) increase the levels of asthma attacks. A researcher collects data on50 people who experienced an asthma attack during the course of one year.
A linear correlation coefficient very close to 0 implies that there is a linear correlation between the averages, but a correlation between the averages does not imply a correlation between individuals as the conclusion incorrectly suggest.
A random sample of 15 college graduates revealed that they worked an average of 5.3 years on the job before being promoted. The sample standard deviation was 1.2 years. Using the 0.95 degree of confidence, what is the confidence interval for the p..
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