The probability that a standard normal variable, Z, is below 1.96 is 0.4750.
Indicate whether the statement is true or false
Q. 2The amount of time required for an oil and filter change on an automobile is normally distributed with a mean of 45 minutes and a standard deviation of 10 minutes. A random sample of 16 cars is selected. 90 of the sample means will be greater than what value?
What will be an ideal response?
Q. 3The probability that a standard normal variable, Z, is between 1.50 and 2.10 is the same as the probability Z is between -2.10 and -1.50.
Indicate whether the statement is true or false
Q. 4The amount of time required for an oil and filter change on an automobile is normally distributed with a mean of 45 minutes and a standard deviation of 10 minutes. A random sample of 16 cars is selected. 95 of all sample means will fall between what two values?
What will be an ideal response?
Q. 5The probability that a standard normal variable, Z, falls between -1.50 and 0.81 is 0.7242.
Indicate whether the statement is true or false
Q. 6The amount of time required for an oil and filter change on an automobile is normally distributed with a mean of 45 minutes and a standard deviation of 10 minutes. A random sample of 16 cars is selected. What is the probability that the sample mean will be between 39 and 48 minutes?
What will be an ideal response?
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