A manufacturer of power tools claims that the mean amount of time required to assemble their top-of-the-line table saw is 80 minutes with a standard deviation of 40 minutes. Suppose a random sample of 64 purchasers of this table saw is taken. The standard deviation of the sampling distribution of the sample mean is ________ minutes.
Fill in the blank(s) with correct word
Q. 2If a data set is approximately normally distributed, its normal probability plot would be S-shaped.
Indicate whether the statement is true or false
Q. 3A manufacturer of power tools claims that the mean amount of time required to assemble their top-of-the-line table saw is 80 minutes with a standard deviation of 40 minutes. Suppose a random sample of 64 purchasers of this table saw is taken. The mean of the sampling distribution of the sample mean is ________ minutes.
Fill in the blank(s) with correct word
Q. 4A normal probability plot may be used to assess the assumption of normality for a particular set of data.
Indicate whether the statement is true or false
Q. 5The amount of bleach a machine pours into bottles has a mean of 36 oz. with a standard deviation of 0.15 oz. Suppose we take a random sample of 36 bottles filled by this machine. So, the middle 95 of the sample means based on sample sizes of 36 will be between ________ and ________.
Fill in the blank(s) with correct word
Q. 6The middle spread, that is the middle 50 of the normal distribution, is equal to one standard deviation.
Indicate whether the statement is true or false
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