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The purpose of a study was to examine the relationship between type of marine snail (periwinkles, topshells) and habitat (in the water of rock pools, on bare rock, on seaweed). The data collected included information concerning snail type and habitat.
A table of counts of snails classified by type and habitat is provided:
HabitatSnail type Water of rock pool On bare rock On SeaweedPeriwinkle 219 145 53Topshells 443 169 39
Report the test statistic and p-value.
What is your decision and conclusion?
State any assumptions you have made. Are these assumptions satisfied with these data?
Entire batch will be rejected if at least one of those tested is defective. Determine the probability that entire batch will be rejected?
In a study of 24 criminals convicted of antitrust offenses, the average age was 55 years, with a standard deviation of 7.6 years. Construct a 98% confidence interval of the true mean age.
a) Set up the null and alternative hypotheses, and perform the hypothesis test. b) Does the jury selection system appear to be fair?
Discuss some of the common uses of IQ tests. Do you think that IQ test should be used for these purpose? Does the Flynn effect alter your thoughts about the uses of IQ test? Explain.
A particular medical operation proves fatal in 1% of the cases. Find an approximation to the probability that there will be at least 2 fatalities in 200 operations.
Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.
How large a sample should be selected in order to estimate the population proportion to within a margin of error of 0.02 with 97% confidence. The sample proportion from the preliminary sample was 0.18.
What is the probability that a randomly selected mango weighs less than 14 ounces?
Evaluate probability values using normal distribution and How many students earned more than $36,000? _______
A survey of licensed drivers inquired about running red lights. One question asked, "Of every ten motorists who run a red light, about how many do you think will be caught?"
The Queen Mary sails between England and the U.S. Stowaways are sometimes found on board. The ages (years) of stowaways from eastbound and westbound crossings are given below. Eastbound: 24, 24, 34, 15, 19, 22, 18, 20, 20, 17 Westbound: 41, 24, 32..
The U.S. Bureau of Labor Statistics released hourly wage figures for western countries in 2000 in the manufacturing sector. The hourly wage was $24.01 in Germany, $22.00 in Japan, and $19.86 in the United States.
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