Question

Historically, the daily average temperature in Waterloo in November has been 2.3 degrees, with a standard deviation of 5 degrees. Assuming daily average temperatures are normally distributed what is the probability that the daily average temperature on Nov 15 will be 5 degrees or more?

Question 7 options:

	0.4631
	0.7054
	0.025
	0.2946

Question 8 (1 point)

Historically, the daily average temperature in Waterloo in November has been 2.3 degrees, with a standard deviation of 5 degrees. Assuming daily average temperatures are normally distributed, what is the probability that the mean of the daily average temperatures in Nov 2019 (which has 30 days) will be 5 degrees or more?

Question 8 options:

	0.025
	0.4814
	0.0015
	0.2946

Question 9 (1 point)

A larger sample size reduces the standard deviation of the sampling distribution of the sample mean because:

Question 9 options:

	A bigger sample increases sampling error
	A bigger sample gives you a more accurate estimate of the population standard deviation
	A bigger sample reduces non-sampling error
	A bigger sample means that any one observation in the sample has less ability to influence the mean

Answer 1

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