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Physical Sciences
It's known as the Hum, a steady, droning sound heard in places all around the world. It is a lowfrequency, annoying, throbbing, unexplained sound. It seems to be louder at night and indoors, and approximately 2% of the people living in any given Hum-prone area can hear the sound.
To determine if more people are affected by the Hum, a random sample of 1300 adults in Taos, New Mexico, was obtained, and 24 reported that they regularly hear the noise. Is there any evidence to suggest that the proportion of adults in this area who hear the Hum has changed? Use a = 0.05 and use the p value associated with this hypothesis test to draw a conclusion.
The probability that a bank customer will default on a loan is 0.04 if the economy is high and 0.13 if the economy is not high.- What is the probability that the person will default on the loan?
City government has collected the following data on annual sales tax collections and new car registrations: Determine the least squares regression equation.
What is the variable of interest?- Is this sample random? If so, justify your answer. If not, describe a technique to obtain a random sample.
the wechsler iq test has a normal shape withnbspmu100 andnbspsigma15. nbspif you take a random sample of n144 students
a sample of size 500 gave a sample proportion of 0.3. what is the standard error of the sample proportion? give your
An important subcomponent of a medical device produced by a manufacturing line is normally distributed with mean 70.2" and standard deviation is 1.26".
the alphacor company experiences some type of failure on its computer network on average once every 4 hours. assume
It is estimated that the probability that the general population will live past their 85th birthday is 5.4%. Use the standard normal distribution to approximate this Binomial problem and answer the following questions.
Construct the sampling distribution of sample means for samples of size 2 selected from this set and construct the sampling distributions of sample ranges for samples of size 2
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?
You are given that q60 = 0.2, q61 = 0.4, and the interest rate is a constant 25%. Give the complete distribution of the random variable L and use this to find 0V.
for the most recent year available the mean annual cost to attend a private university in the united states was 26889.
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