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A normal population has a mean of 60 and a standard deviation of 3. You select a sample of 36. Compute the probability the sample mean is (Round z values to 2 decimal places and final answers to 4 decimal places):
a) Less than 59.
b) Between 59 and 61.
c) Between 61 and 62.
d) Greater than 62.
Create a 95 % confidence interval for the true mean. Why might normality be the issue here?
A scientist examined the effect of temperature and catalyst on the yield of a reaction. He ran the experiment at both 150° and 200°C with two types of catalyst.
Probability values based on normal distribution - old exit exam followed a normal distribution
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Any value which is based on having measured a sample is called:
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Could the interval be used to estimate the mean amount of time a 9-year-old American spends eating & drinking each day. Explain.
How does the bell-shaped curve for the sampling distribution of sample means for samples of size n = 100 compare to the bell-shaped curve for sampling distribution of sample means for samples of size n = 60.
Can the company claim that they are faster than the average utility?
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
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