Which statement about the normal distribution is false? Approximately 68 % of the data lie within 1 standard deviation of the mean. Approximately 99.7 % of the data lie within 3 standard deviation of the mean. None of these is true. Approximately 95 % of the data lie within 2 standard deviation of the mean. SAMSUNG

A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what percentage of students spend less than 12 hours in class?

A mandatory competency test for high school sophomores has a normal distribution with a mean of 470 and a standard deviation of 140. The top 5.6%of students receive$500 What is the minimum score you would need to receive this award?   The minimum score needed to receive the award is

Americans love ice cream .The annual per capita consumption of ice cream ,in pounds ,in the united states can be approximately by a normal distribution with mean 16.5 lbs and standard deviation 2.5 lbs  what percent of Americans eat less than 14 lbs of ice cream each year ?

The manager at UPS feels that the weights of packages shipped recently are less than in he past. Records show that in the past packages have had a population mean weight of 36.7 pounds and a population standard deviation of 14.2 pounds. A random sample of last month's shipping records yielded a sample mean weight of 32.1 pounds for 64 packages. Does this indicate that the weights of packages recently shipped is less than 36.7 pounds? Use a = 0.01. Use the Classical Approach.

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The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 117 and standard deviation of 15 .Someone qualifies as having Stage 2 high blood pressure if their systolic blood pressure is 160 or higher. d. What two values divide this normal curve into a middle 97%, in other words, what two values represent the middle 97% of blood pressures?  Put the lower number FIRST!   and  mmHg e. How many standard deviations away would a blood pressure of 140 be?     f. Would this be considered unusual? Not Unusual Very Unusual Somewhat Unusual

Students in the psychology department at General State University consumes an average of 7 sodas per day with a standard deviation of 2.5.  the distribution is normal.  Explain how you would go about answering the following questions (include your answer to the question in your response): How many sodas would an individual at the 75thpercentile drink per day?

State two ways the standard deviation differs from the average deviation.

Cars on I-40 have a mean speed of 73 MPH at a certain mile marker, with a standard deviation of 8 MPH. What Percentage of Cars averaged at least 78 mph?