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Question: Finding the standard deviation. The level of various substances in the blood influences our health. Here are measurements of the level of phosphate in the blood of a patient, in milligrams of phosphate per deciliter of blood, made on 6 consecutive visits to a clinic:
5.6 5.2 4.6 4.9 5.7 6.4
A graph of only 6 observations gives little information, so we proceed to compute the mean and standard deviation.
(a) Find the mean from its definition. That is, find the sum of the 6 observations and divide by 6.
(b) Find the standard deviation from its definition. That is, find the distance of each observation from the mean, square the distances, then calculate the standard deviation.
(c) Now enter the data into your calculator and use the mean and standard deviation buttons to obtain x¯ and s. Do the results agree with your hand calculations?
The following data are based on information from Domestic affairs. Let X be the average number of employees in a group helh insurance plan, and let Y be the average administrative cost as a percentage of claims.
The sample correlation coefficient between x and y is 0.375. It has been found out that the p-value is 0.256 when testing H0: ρ = 0 against the two-sided alternative H1: ρ ≠ 0. To test H0: ρ = 0 against the one-sided alternative H1: ρ > 0 at a sig..
1.suppose we are testing the null hypothesis h0 micro 50 and the alternative ha micro ne 50 for a normal population
q1. mimi was the 5th seed in 2012 umuc tennis open that took place in august. in this tournament she won 83 of her 100
Conducts a study of 50 randomly selected seniors and finds the average debt is $2995, and the population standard deviation is $1100. With alpha = 0.05, is the student senate correct?
if the sample mean is 8 the hypothesized population mean is 4 and the population standard deviation is 2 compute the
Ten automobiles were driven on a measured test track - once with standard gasoline with no additive and once with an additive supposed to increase miles per gallon (mpg). The results are given below:
1. The data set calcium .txt contains the calcium levels of eleven test sub jects at zero hours and three hours after taking a multi-vitamin containing calcium.
Suppose we want to test the hypothesis. State hypothesis Ho and the alternative hypothesis H1 that we would use for this test.
1. The local county is considering a budget proposal that would reallocate funding to renovate the city pools. A survey is conducted to measure public opinion of the proposal. A total of 200 individuals responded to the survey. Fifty of the respon..
an irate customer called dollar day mail order company 40 times during the last two weeks to see why his order had not
In order to discover if higher SAT score, had an effect on a person's future earnings. Are these good variables and what type of statistical methods would I use to evaluate the hypotheses? Would I use a multiple regression?
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