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A radio station must broadcast at exactly 103.1 MHz. In a random sample of 25 days they average 103.8 MHz. The SD at radio stations with similar equipment is .1 MHz. At level of significance a = .05, are they meeting FCC specifications? Do a Z-test.
Interpretation of results from nominal data can be difficult except for the frequency of each variable -
Below are scores for 10 randomly selected students on each exam. 95% confidence interval for the mean scores on?
Explain the relationship between sample size and the likelihood of a statistically significant difference between the measured values of two groups.
Find the probability that a sample of 16 tires will have an average tire life of more than 52000 miles, give that the mean tire life is 50000miles and the standard Deviation is 8489.13.
How much should be charged as a single premium on each contract, so that there is a 95% chance that premiums will be sufficient to cover the aggregate claims for this group of 100 contracts.
Generate a 95% CI for the difference in proprotions of particpants reportinga reduction of symptoms between the experimental and placebo groups.
Identify Independent and Dependent variable being investigated. Formulate the hypothesis statement regarding your research issue.
These data are presented below. Should the manager be given an increase in staff? Why or why not? Please show your work.
At the airport entry sites, a computer is used to randomly decide whether a traveler's baggage should be opened for inspection. If the chance of being selected is 12%, can you model your chance of having your baggage opened with a Bernoulli model?..
For the 20 test scores shown, find the percentile rank for a score of 86.
assume that a procedure yields a binomial distrubition with n trials and the probability of success for one trial is p.
A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in the California and finds tha..
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