The amount of mustard dispensed from a machine at The Hotdog Emporium is normally distributed with a mean of 0.9 ounce and a standard deviation of 0.1 ounce. If the machine is used 500 times, approximately how many times will it be expected to dispense 1 or more ounces of mustard.
What is 80?
100
12. What is z < -0.37?
What is : 0.3557 or 35.57%
100
A teacher wants to use a probability histogram to show her students the probability of making a grade in a particular range. What would you label the horizontal axis?
What is the score?
100
Suppose the test scores on an exam show a normal distribution with a mean of 82 and a standard deviation of 5. Within what range do about 95% of the scores fall?
What is 72 < x < 92?
100
A season of football scores falls in a normal distribution with a mean of 35 and standard deviation of 6. What is the probability that a score was between 29 and 41?
What is 0.68?
200
Professor Halen has 184 students in his college mathematics lecture class. The scores on the midterm exam are normally distributed with a mean of 72.3 and a standard deviation of 8.9. How many students in the class can be expected to receive a score between 82 and 90? Express answer to the nearest student.
What is 21 students?
200
13. What is z < 1.63?
What is 0.9484 or 94.84%
200
Based on the following exam scores, which interval would you not use for a probability histogram?
75,62,98,73,74,56,71,64,79,68,89,51,66,67,50,60,62,60,70,80,85,91
What is 0-50?
200
Suppose the heights of students at a school show a normal distribution with a mean of 50 inches and a standard deviation of 4. Within what range do about 68% of the scores fall?
What is 46 < x < 54?
200
The heights of 250 basketball players had a normal distribution with mean 74 with a standard deviation of 2. About how many players' heights were between 70 and 78?
What is 238?
300
Neesha's scores in Chemistry this semester were rather inconsistent: 100, 85, 55, 95, 75, 100.
For this population, how many scores are within one standard deviation of the mean?
What are 5 scores?
300
Which z-score = 0.0643?
What is z < -1.52?
300
Women recorded their record numbers of push-ups. 10,15,19,20,22,23,29,29,30,31,32,33,34,36,36,38,39,40,41,47,58
How tall would the bar representing the 30-39 range be on a probability histogram?
What is 0.43?
300
Suppose running times for a race show a normal distribution with a mean of 120 and a standard deviation of 15. Within what range do about 95% of the scores fall?
What is 90< x < 150?
300
The grades on a test fell in a normal distribution with mean of 86 and standard deviation of 4. What is the probability that a student's score falls between 78 and 94?
What is 0.95?
400
A machine is used to fill soda bottles. The amount of soda dispensed into each bottle varies slightly. Suppose the amount of soda dispensed into the bottles is normally distributed. If at least 99% of the bottles must have between 585 and 595 milliliters of soda, find the greatest standard deviation, to the nearest hundredth, that can be allowed.
What is 1.67?
400
15. Suppose the pre-test scores on an exam have a mean of 35.2 and a standard deviation of 1.2. What is P(x < 37.1)?
What is 1.58 = .9429 or 94.29%
400
A histogram displays the probabilities that a part-time employee's pay falls into specific ranges from $5.00 to $14.99. What is the range of values on the vertical axis?
What is 0-1?
400
Suppose the intelligence quotient of a population shows a normal distribution with a mean of 100 and a standard deviation of 15. Within what range do about 99.7% of the scores fall?
What is 55< x < 145?
400
276 test scores fell in a normal distribution with a mean of 76 and a standard deviation of 3.5 About how many bills were between 65.5 and 86.5?
What is 275?
500
A group of 625 students has a mean age of 15.8 years with a standard deviation of 0.6 years. The ages are normally distributed. How many students are younger than 16.2 years?
What are 467 students?
500
What is z > 0.62?
What is 1-.7324 = .2676 or 26.76%?
500
The histogram represents the data from a lemonade stand. Approximately what is the probability that a cup of lemonade was sold when the temperature was in the 70's or 90's?
Temperature 60-70, 70-80, 80-90, 90-100
Cups Sold 15, 40, 52, 38
What is 0.50 or 50%?
500
Suppose the amounts of money earned by individuals for a fundraiser show a normal distribution with a mean of 40 and a standard deviation of 6. Within what range do about 68% of the scores fall?
What is 34 < x < 46?
500
400 bowling scores gathered at the bowling alley had a normal distribution. The mean was 126 and the standard deviation was 17. How many scores fell between 92 and 160?