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Density Curve
Z Chart
68-95-99.7
Standard Normal
Misc.
100
Always 1 for a density curve.
What is the area under the curve?
100
The area under the standard normal curve corresponding to z>-1.22.
What is .8888?
100
The time to complete a standardized exam is approximately normal with a mean of 70 minutes and a standard deviation of 10 minutes. Using the 68–95–99.7 rule, _________ percentage of students will complete the exam in under an hour.
What is 16%?
100
The temperature at any random location in a kiln used in the manufacture of bricks is normally distributed with a mean of 1000 and a standard deviation of 50° F. If bricks are fired at a temperature above 1125°F, they will crack and must be discarded. When the bricks are placed randomly throughout the kiln, ______ proportion of bricks that crack during the firing process.
What is .0062?
100
In picture number 2 on the board, compare the mean and median.
What is the mean is greater than the median?
200
The percent of the observations under .2 in picture 1.
What is 12%?
200
The area under the standard normal curve corresponding to z<2.34
What is .9904?
200
The time to complete a standardized exam is approximately normal with a mean of 70 minutes and a standard deviation of 10 minutes. Using the 68–95–99.7 rule, _______ percentage of students will complete the exam in between 60 and 90 minutes.
What is 81.5%?
200
The temperature at any random location in a kiln used in the manufacture of bricks is normally distributed with a mean of 1000 and a standard deviation of 50° F. When glazed bricks are put in the oven, if the temperature is below 900°F they will miscolor. When the bricks are placed randomly throughout the kiln, _______ proportion of glazed bricks that miscolor.
What is .0228?
200
In picture number 2 on the board, the picture would be described as symmetric, skewed left or skewed right.
What is skewed right?
300
The percent of the observations that lie above .6 in picture 1.
What is 52%?
300
The are under the standard normal curve corresponding to -1.32<z<-1.02
What is .0605?
300
The time to complete a standardized exam is approximately normal with a mean of 70 minutes and a standard deviation of 10 minutes. The percentile that corresponds to 50 minutes...
What is 2.5ths percentile?
300
The temperature at any random location in a kiln used in the manufacture of bricks is normally distributed with a mean of 1000 and a standard deviation of 50° F. _______percent of the bricks will be fired between the temperatures of 900 and 1125 degrees?
What is .9710?
300
The trapazoid formula.
What is A=1/2 (b1+b2)h?
400
The percent of the observations that lie between .4 and .8 for picture 1.
What is 44%?
400
The area under the standard normal curve corresponding to x< 500 when mean is 544 and standard deviation is 103.
What is .3336
400
The time to complete a standardized exam is approximately normal with a mean of 70 minutes and a standard deviation of 10 minutes. The percentile that corresponds to 70 minutes...
What is the 50th percentile?
400
If a plant can produce 500,000 bricks per day and can sell the bricks that are fired in the temperatures listed in number 17, ______is the number of bricks will they sell each day.
What is 485,5000 bricks?
400
In picture number 3 on the board, compare the mean and median.
What is they are the same?
500
The percent of the observations that lie between .2 and .6 in picture 1.
What is 36%?
500
The area under the standard normal curve when x>650 and the mean is 544 and the standard deviation is 103
What is .1515?
500
The time to complete a standardized exam is approximately normal with a mean of 70 minutes and a standard deviation of 10 minutes. The percentile that corresponds to 80 minutes...
What is the 84th percentile?
500
The time taken to prepare the envelopes to mail a weekly report to all executives in a company has a normal distribution with a mean of 35 minutes and a standard deviation of 2 minutes. On 95% of occasions the mailing preparation takes less than.....
What is 38.3 minutes?
500
sketch and label a standard normal curve
What is see example?