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Question: Physical Sciences The design specifications for a new gymnasium at a local high school call for the lights to produce at least 40 footcandles (a measure of brightness). Before the new facility was opened to students, the contractor collected a sample of 23 brightness measurements at random locations in the gym. The sample mean was x = 38.63 footcandles and the sample standard deviation was s = 5.6 footcandles.
a. Is there any evidence to suggest the mean brightness in the gym is less than the design specification? Assume normality and use a = 0.01.
b. Find bounds on the p value associated with this hypothesis test.
Two populations are independently surveyed using simple random samples of size n, and two proportions, p1 and p2, are estimated.
The observed frequencies are 891 Insured and Surgical, 316 Uninsured and surgical, 290 Insured and medical, 119 uninsured and medical. Find out expected observations and deviation.
a sample of n 8 scores has a mean of m 12. one new score is added to the sample and the new mean is found to be m 13.
Percentage distributions are useful in comparing two frequency distributions having different total frequencies. Construct percentage distributions from the following two frequency distributions and determine whether the distributions of daily ab..
let x1...x25 be a random sample from a normal distribution with mean mu and variance 100. the null hypothesis h0 mu50
for a population with micro 40 and s 7 find the -score for each of the following x values. note you probably will need
1) Let x represent the number of extracurricular activities per student. Construct a probability distribution for x.
Find the probability that in a given year a) exactly one major hurricane will strike the U.S. mainland, b) at most one major hurricane will strike the U.S. mainland.
control chart for x bar is maintained on a quality characteristic which is normally distributed.the sample size is n4.
This set of height measurements are recorded in centimeters. Answer the following questions using the Histogram Applet. Is 1.7cm a Plausible mean value? Explain.
What were the events that led to European Convention on Human Rights and what were its effects?
Show the sampling distribution of p and what is the probability the Times/CNN poll will provide a sample proportion
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