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Ben wants to custom order 5 collars for his 5 unique cats. A customer ordered collar is tailor fitted to a pet and comes in a choice of 5 different colors.
How many selections of collars for the 5 cats are possible if repetitions of colors are allowed?
use linear regression to forecast values for periods 11 to 13 for the following time
For a sample of 11 independent observations from a normal distribution of unknown μ and unknown variance σ 2 , the sample mean is 74.6 and sample variance is 2.2. What is the lower point of the 90% confidence interval for μ?
what is the t-test based on students t-distribution useful for?a. comparing values about the meanb. determining if the
The life in hours of a battery is known to be approximately normally distributed, with standard deviation s = 1.25 hours. A random sample of 10 batteries has a mean life of x ¯=40.5 hours. Is there evidence to support the claim that battery life ex..
a fan is to produce an air curtain to separate a loading dock from a security room. the air curtain is a jet of air 8ft
in a study of 420006 cell phone users 164 subjects developed brain cancer. test the claim that cell phone users
From studying a similar facility in the area, they found that the distribution of the number of patients requiring hospitalization during aweek could be approximated by a normal distribution with a mean of 125 and a standard deviation of 32. Use t..
Electricity is commonly traded at the California-Oregon border (COB) and Palo Verde (PV) in Arizona. Assume you take a sample of 100 daily electricity market closing prices (in $/megawatthour) from both COB and PV.
Study the effect of temperature on yield in a chemical process, four batches were produced at each of three temperature levels and construct an analysis of variance table
Use data visualization techniques (graphical plotting) to see what the data will tell you - calculate correlations among the portfolio, SH, and RWM.
The impact of campaign film on attitudes toward a political candidate was investigated. Prior to showing the film, the attitudes of 15 people toward the candidate were assessed using a political likability scale.
a statistical tutorial centre has been designed to handle a maximum of 25 students per day. suppose that the number x
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