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A medical investigator wanted to test the claim that taking a multivitamin capsule with extra amounts of vitamin C would reduce the frequency of common colds. Pairs of children from the same family were randomly assigned to either the experimental group which received the vitamin C capsule or the control group which received a placebo capsule containing sugar. The parents kept a health record for their child for the year. At the end of a year, the number of days ill due to a cold was determined for each child. Test this claim using (Alpha=0.5) Given the data below:
Sibling pair Vitamin Placebo
1 4 4
2 5 2
3 2 5
4 4 3
5 1 1
T=
One or two tailed test?
T critical value=
Ho=
H1=
Reject or fail to reject Ho?
However your friend wants to save money on this trial an use a small number of batteries for the test (n 100). What are the pros and cons of these two positions?
What alternatives other than specific protection strategies might Larkin Oil consider (for example, insurance)?
As an international development researcher, you would like to know African Citizen's perceptions about current levels of democracy. Your working hypothesis
Temperatures. The table below gives the average high temperatures in January and July for several European cities
This process is sometimes used as a model for random noise.- Find the time-varying autocorrelation function. - Find the PSD of this process.
What is the nature of intramodal and intermodal competition in the motor carrier industry? How have the motor carriers fared in terms of intermodal competition since 1980?
Distinguish between producer'srisk and consumer'srisk. In this context, explain the terms acceptable quality level and limiting quality level. Discuss in stances for which one type of risk might be more important than the other.
To find weighted aggregate price index using Laspeyres and Paasche method.
In a non instanteneous receipt model, daily demand is 55 units and daily production is 120 units, Co=$70 and Cc=$4 per unit per year. What is the maximum inventory level?
determine what completes the following definition the is a measure of the differences between the observed sample
A Seattle department store sampled 87 items sold in January and found that 5 of the items were returned.
The number of nonconforming springs in a batch,denoted as X, is a binomial random variable.
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