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If many samples of size 100 (that is, each sample consists of 100 items) were taken from a large non-normal population with a mean of 10 and variance of 16, what would be the mean, variance, standard deviation and shape of the distribution of sample means? Give reasons for your answers.
Determine what would happen to your critical value (Z) if you were to change the level of significance (a) from .05 to .1 in a two tailed hypothesis test.
In a survey on the quality of customer service at Car Toys, customers were asked to rate the service on a scale from 1 to 10, with 10 being that a customer was completely satisfied.
If average size in square feet of homes built is 1810, determine maximum and minimum sizes of homes contractor must build. Suppose that standard deviations are 92 square feet.
The hypotheses for this scenario are as follows: Null Hypothesis: μ ≤ 21.61, Alternative Hypothesis: μ > 21.61. You perform a one sample mean hypothesis test on a random sample of data and observe a p-value of 0.0095. What is the appropriate concl..
Solve using the square root property: Radicands must be enclosed within
If you were to accept the null hypothesis, even though the null hypothesis was false, what type of error would you have commited?
A retailer finds that the demand for a very popular board game averages 100 per week with a standard deviation of 20. If the seller wishes to have adequate stock 95% of the time.
What is the probability that they all hit the target?
A researcher want to estimate the mean shoulder height of both male and female bears within 0.25 centimeters. Determine the minimum sample size required to construct a 99% confident interval
A machine is set to pump cleanser into a process at the rate of 8 gallons per minute. Upon inspection, it is learned that the machine actually pumps cleanser at a rate described by the uniform distribution over the interval 7.5 to 10.5 gallons per..
What if the assumption E[u/x]=0 is not satisfied? Illustrate using an example. Explain the relationship represented by a population regression function.
As number sampled is large and those advocating a strike constitute over 50%, can we suppose that majority of all steelworkers favour a strike?
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