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Use a 0.05 significance level test the claim taht the three cateogries of blood lead level have hte same mean full IQ score. Does it appear that the exposure to lead has an effect on full IQ scores?
Source of Variation SS DF MS F P value F Crit
Between Groups 938.3653 2 469.1827 2.303395 0.104395 3.07309
Within Groups 24035.63 118 203.6918
Total 24974 120
There are two major tests of readiness for college, the ACT and the SAT. ACT scores are reported on a scale from 1 to 36. The distribution of ACT scores for more than 1 million students in a recent high school graduating class was roughly normal with..
suppose the amount of cosmic radiation a person is exposed to when flying across the country is a random variable
Suppose that 15% of the population is left-handed. If 20 people are selected at random, find the probability that exactly 4 of them are left-handed.
to estimate the mean age for a population of 4000 employees a simple random sample of 40 employees is selected.a. would
Consider a high school basketball player that is a 70% free throw shooter. During the season, what is the probability that this player makes the third free throw in five shots (exactly 3 shots in 5 attempts)?
Illustrate what does weighting add to usefulness of moving averages and explain how is it done. The yield on a thirty year treasury note at the end of every year since 1990 is recorded below.
Given that the safety conditions at the plant remain the same next year, what is the probability that the number of serious injuries will be less than 2?
Which confidence interval has the most variability?
A random sample of 72 statistics students was taken to estimate the proportion of students who are also in the Math Club. The 90% confidence interval was 0.438 to 0.642. Using this information, what sample size would be necessary to estimate the t..
a companys raw data sample of weekly salaries in dollars is shown
What is the difference between the probability value and the significance level? Please, also provide examples.
you are trying to estimate the number of csn students with iphones. a random sample of 130 students reveals that 65 of
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