Confidence interval of the true mean of unhealthy days
The average number of unhealthy days based upon Air Quality Index, AQI, in random sample of 10 metropolitan areas was 33.5 and sample standard deviation was 27.7 days. Determine the 98% confidence interval of the true mean of unhealthy days
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Determine the inverse of function below. Graph function below and inverse function. Find domain, range, and asymptotes of function below and inverse function. Illustrate both graphs.
An intellectual society, HIGHQ, claims that it grants membership only to people whose IQ is at least 2.5 standard deviations above average. Determine the best upper bound that can be attained by Chebyshev's Inequality for the proportion of people
A university dean of students wishes to determine the avearge number of hours students spend doing home work per week. =6.2 hours from a previous study.
A corporation administers aptitude test to all new sales representatives. Management is interested in extent to which this test is capable to predict sales representatives' eventual success. The accompanying table records average weekly sales and
Let f(x) denote Jack's weekly income and consider g(x) dente Jill's weekly income form selling suits. Determine rules of functions f &g.
From the normal table, the percentages for classes are 2.28%, 13.59%, 34.13%, 34.13%, 13.59%, and 2.28%, respectively. Do observed frequency data provide significant reason to discredit hypothesis that the weights are normally distributed with mea
A sample of 25 blue-collar employees at production plant was taken. Each and every employee was asked to assess his own job satisfaction (x) on scale from 1 to 10. In addition, the numbers of days absent (y) from work throughout the last year were
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