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The following companies are interested in conducting a market survey of their products/ services. Explain the possible sampling techniques that they might choose.
(a) High-end automobiles
(b) Cooking range
(c) Cell phones
(d) Boutique clothes
(e) City municipal services
(f) State revenue department
(g) Home insurance company
(h) Patients in a health care facility
(i) Physicians in a health care facility.
the probability that a household is both prosperous and educated is P (A and B) = 0.082. What is the probability P (A or B) that the household selected is either prosperous or educated.
Illustrated significant negative relationship between amount of homework assigned and student attitudes. Determine the explanatory variable and explain the response variable?
The average hourly wage of employees of a certain company is $12.37. Assume the variable is normally distributed. If the standard deviation is $3.84, find the probability that a randomly selected employee earns less than $8.72.
One variable recorded is the count X of finish defects (dimples, ripples, etc) in the car's paint. Is it reasonable to use a binomial distribution?
The other measurement is below 10, i.e. where high measurements tend to cancel low measurements. Use these possibilities to compute the distribution of when n = 2(i.e., find , , etc.).
The formula for a regression equation is Y' = 2X + 9. What would be the predicted score for a person scoring 6 on X? If someone's predicted score was 14, what was this person's score on X
What is the probability of correctly guess the right code on the first try? What is the probability of not correctly guessing the right code o the first try?
Fit a linear regression model for bp against sodium. Do you think this is a model with a good fit? Why?
when n 20 and p 0.1 i can approximate the distribution of the sample proportion with a normal distribution with mean 2
A voltmeter is used to measure a known voltage of 100 V. Forty percent of the readings are within 0.5 V of the true value. Estimate the standard deviation for the meter.
if a vsdmotor combination has a torque of 100 n.m at the rated speed and full power what is the maximum torque it can
If you take the mean weights for random groups of 10 adults and form a new distribution, how will this new distribution compare to distribution of individuals?
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