warm-up the probability that a person owns and i-phone is 0.64. what is the probability that in a...

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Warm-Up The probability that a person owns and I-phone is 0.64. What is the probability that in a random group of 10 people, at least 7 own an I-phone? What is the probability that in a random group of 8 people, exactly 12 own their own phone. In a group of 20, what is the expected number & standard deviation that own an I-phone? What is the probability that if we begin asking random people if they have an I-phone we don’t find an I-phone owner until the 5 th person asked?

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Page 1: Warm-Up The probability that a person owns and I-phone is 0.64.  What is the probability that in a random group of 10 people, at least 7 own an I-phone?

Warm-Up The probability that a person owns and I-phone is 0.64.

What is the probability that in a random group of 10 people, at least 7 own an I-phone?

What is the probability that in a random group of 8 people, exactly 12 own their own phone.

In a group of 20, what is the expected number & standard deviation that own an I-phone?

What is the probability that if we begin asking random people if they have an I-phone we don’t find an I-phone owner until the 5th person asked?

Page 2: Warm-Up The probability that a person owns and I-phone is 0.64.  What is the probability that in a random group of 10 people, at least 7 own an I-phone?

Normal Distribution Calculations

Page 3: Warm-Up The probability that a person owns and I-phone is 0.64.  What is the probability that in a random group of 10 people, at least 7 own an I-phone?

After HW

Lesson 2 Warm-up…(1-12)

Page 4: Warm-Up The probability that a person owns and I-phone is 0.64.  What is the probability that in a random group of 10 people, at least 7 own an I-phone?

When Tiger Woods hits his driver, the distance the ball travels follows a Normal Distribution with mean 304 yards and standard deviation 8 yards. What percent of Tiger’s drives travel at least 290 yards?

Page 5: Warm-Up The probability that a person owns and I-phone is 0.64.  What is the probability that in a random group of 10 people, at least 7 own an I-phone?

Scores for a test have a mean of 100 and standard deviation of 15. Find the probability that a score is below 112.

Page 6: Warm-Up The probability that a person owns and I-phone is 0.64.  What is the probability that in a random group of 10 people, at least 7 own an I-phone?

Every month, American households generate an average of 28 pounds of newspaper for garbage or recycling. Assume =2 pounds. If a household is selected at random, find the probability that it generates between 27 and 31 pounds per month.

Page 7: Warm-Up The probability that a person owns and I-phone is 0.64.  What is the probability that in a random group of 10 people, at least 7 own an I-phone?

An exclusive college desires to accept only the top 10% of all graduating seniors based on the results of a national placement test. This test has a mean of 500 and a standard deviation of 100. Find the cutoff score for the exam.

Page 8: Warm-Up The probability that a person owns and I-phone is 0.64.  What is the probability that in a random group of 10 people, at least 7 own an I-phone?

For a medical study a researcher wishes to select people in the middle 60% of the population based on blood pressure. If the mean systolic blood pressure is 120 and the standard deviation is 8, find the upper and lower reading that would qualify a person to be in the study.

Page 9: Warm-Up The probability that a person owns and I-phone is 0.64.  What is the probability that in a random group of 10 people, at least 7 own an I-phone?

In the 2008 Wimbledon tennis tournament, Rafael Nadal averaged 115 miles per hour (mph) on his first serves. Assume that the distribution of his first serve speeds is Normal with a mean of 115 mph and a standard deviation of 6 mph. About what proportion of his first serves would you expect to exceed 120 mph?

Page 10: Warm-Up The probability that a person owns and I-phone is 0.64.  What is the probability that in a random group of 10 people, at least 7 own an I-phone?

According to http://www.cdc.gov/growthcharts/, the heights of 3 year old females are approximately Normally distributed with a mean of 94.5 cm and a standard deviation of 4 cm. What is the third

quartile of this distribution?

Page 11: Warm-Up The probability that a person owns and I-phone is 0.64.  What is the probability that in a random group of 10 people, at least 7 own an I-phone?

Classwork

Lesson 2 Warm-Up: (11-14)

Page 12: Warm-Up The probability that a person owns and I-phone is 0.64.  What is the probability that in a random group of 10 people, at least 7 own an I-phone?

Homework

Worksheet