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A Pathway To Introductory Statistics 1st Edition Jay Lehmann - Solutions
Undergraduate enrollments at Vanderbilt University in 2013 are shown in Table 11 for various schools within the university. Table 11 Enrollments in Schools at Vanderbilt University School Enrollment College of Arts and Science ………………….. 4197 Blair School of Music
The numbers of degrees awarded by Michigan University for the academic year 2012-2013 are shown in Table 12 for various types of degrees. Assume each student earned just one of the types of degrees shown in the table in the academic year 2012–2013. Table 12 Degrees Awarded by Michigan
Some friends pay a total of $19 for a pizza. Each of the n friends pays an equal share of the cost. Complete Table 13 to help find an expression that describes the cost (in dollars) per person. Show the arithmetic to help you see a pattern.
A student drives her car 150 miles at a constant speed for t hours. Complete Table 14 to help find an expression that describes the car€™s speed (in miles per hour). Show the arithmetic to help you see a pattern.
2 + (-7)Find the sum by hand.
5 + (-3) Find the sum by hand.
-1+ (-4) Find the sum by hand.
-3+ (-2) Find the sum by hand.
7 + (-5) Find the sum by hand.
6 + (-9) Find the sum by hand.
-8 + 5 Find the sum by hand.
-3 + 4 Find the sum by hand.
-7 + (-3) Find the sum by hand.
-9 + (-5) Find the sum by hand.
4 + (-7) Find the sum by hand.
8 + (-2) Find the sum by hand.
12 + (-25) Find the sum by hand.
17 + (-14) Find the sum by hand.
-39 + 17 Find the sum by hand.
-89 + 57 Find the sum by hand.
-246 + (-899) Find the sum by hand.
-347 + (-594) Find the sum by hand.
True or False: The sum of a negative number and a positive number is always a negative number.
-4.1 + (-2.6) Find the sum by hand.
-3.7 + (-9.9) Find the sum by hand.
-5 + 0.2 Find the sum by hand.
-0.3 + 7 Find the sum by hand.
2.6 + (-99.9) Find the sum by hand.
37.05 + (-19.26)Find the sum by hand.
5/7 + (- 3/7)Find the sum by hand.
2/5 + (- 1/5)Find the sum by hand.
-5/8 + 3/8Find the sum by hand.
-5/6 + 1/6Find the sum by hand.
-1/4 + (- 1/2) Find the sum by hand.
-2/3 + (-5/6) Find the sum by hand.
5/6 + (- 1/4)Find the sum by hand.
2/3 + (-3/4)Find the sum by hand.
A person bounces several checks and is charged service fees such that the balance of the checking account is -75 dollars. If the person then deposits 250 dollars, what is the balance?
A person bounces several checks and is charged service fees such that the balance of the checking account is -112.50 dollars. If the person then deposits 170 dollars, what is the balance?
A check register is shown in Table 15. Find the final balance of the checking account.
A check register is shown in Table 16. Find the final balance of the checking account.
A person has a credit card balance of -5471 dollars. If she sends a check to the credit card company for $2600, what is the new balance?
A person has a credit card balance of -2739 dollars. If he sends a check to the credit card company for $530, what is the new balance?
A student has a credit card balance of -3496 dollars. If he sends a check to the credit card company for $2500 and then uses his credit card to purchase a bicycle for $613 and a helmet for $24, what is the new balance?
A student has a credit card balance of -873 dollars. If she sends a check to the credit card company for $500 and then uses the card to buy a tennis racquet for $249 and a tennis outfit for $87, what is the new balance?
Three hours ago, it was -5°F. If the temperature has increased by 9°F in the last three hours, what is the current temperature?
Four hours ago, it was -12°F. If the temperature has increased by 8°F in the last four hours, what is the current temperature?
If a is negative and b is negative, what can you say about the sign of a + b? Use a number line to show this property.
If a is positive, b is negative, and b is larger in absolute value than a, what can you say about the sign of a + b? Use a number line to show this property.
a. Evaluate -a for a = -3.b. Evaluate -a for a = -4.c. Evaluate -a for a = -6.d. A student says that -a represents only negative numbers because -a has a negative sign. Is the student correct? Explain.
a. Evaluate a + b for a = -2 and b = 5. b. Evaluate b + a for a = -2 and b = 5. c. Compare your results from parts (a) and (b). d. Evaluate a + b and b + a for a = -4 and b = -9, and then compare the results. e. Is the statement a + b = b + a true for all numbers a and b? Explain.
True or False: A negative number minus a negative number equals a negative number.
1/2 – (-1/4) Find the difference by hand.
5/12 – (-1/6) Find the difference by hand.
-1/6 – 3/8 Find the difference by hand.
-2/3 – 2/5 Find the difference by hand.
Two hours ago, the temperature was 8°F. The temperature is now -4°F.a. What is the change in temperature for the past two hours?b. Estimate the change in temperature for the past hour.c. Explain why the estimate you found in part (b) may not be the actual change in temperature for the past hour.
Three hours ago, the temperature was -6°F. The temperature is now 9°F.a. What is the change in temperature for the past three hours?b. Estimate the change in temperature for the past hour.c. Explain why the estimate you found in part (b) may not be the actual change in temperature for the past
The U.S. presidential election in 2000 was the closest presidential race in the electoral vote since 1876. Yet, only a little over half of eligible voters chose to cast a vote. Table 21 Presidential Election Voter Turnout Year Percent of Eligible Voters Who Voted 1980
In the 1930s, the gray wolf was hunted to near extinction across the western United States. In 1995, 14 wolves were reintroduced to Yellowstone National Park. In the following year, 17 more wolves were released into the park. By the end of 1996, there had been 20 births and 11 mortalities, leaving
The changes in Toyota Prius U.S. sales (in thousands of cars) from one year to the next are shown in Table 23. Table 23 Changes in Toyota Prius U.S. Sales Changes in Sales Years (thousands of cars) 2006–2007 …………………….. 74 2007–2008 …………………….. -23 2008–2009
The changes in corn harvests (in billions of bushels) in the United States from one year to the next are shown in Table 24. Table 24 Changes in Corn Harvests Change in Corn Harvest Years (billions of bushels) 2008–2009 ……………………… 1.0 2009–2010
A quantity increases from amount a to amount b. a. Find the change in the quantity. i. a = 3, b = 5 ii. a = 1, b = 9 iii. a = 2, b = 7 b. By referring to your work in part (a), explain why it makes sense that if a quantity increased, then the change will be positive.
A quantity decreases from amount a to amount b. a. Find the change in the quantity. i. a = 8, b = 2 ii. a = 9, b = 3 iii. a = 5, b = 1 b. By referring to your work in part (a), explain why it makes sense that if a quantity decreased, then the change will be negative.
a. Evaluate a - b for a = 8 and b = 5.b. Evaluate b - a for a = 8 and b = 5.c. Compare your results from parts (a) and (b).d. Evaluate a - b and b - a for a = -2 and b = 4, and compare your results.e. Evaluate a - b and b - a for values of your choosing for a and b, and compare your results.f. From
(-4/9) (-3/20) Perform the indicated operation by hand.
(-7/25) (-5/21) Perform the indicated operation by hand.
-3/4 ÷ 7/6 Perform the indicated operation by hand.
-5/7 ÷ 15/8 Perform the indicated operation by hand.
-24/35 ÷ (-16/25) Perform the indicated operation by hand.
-3/8 ÷ (-9/20) Perform the indicated operation by hand.
-8/3 + (-5/9) Perform the indicated operation by hand.
-3/8 – (-1/10) Perform the indicated operation by hand.
-22/9 ÷ (-33/18) Perform the indicated operation by hand.
-16/20 Simplify by hand.
-18/-24 Simplify by hand.
There were 492 U.S. billionaires in 2014 and 261 U.S. billionaires in 2001. Find the unit ratio of the number of U.S. billionaires in 2014 to the number of U.S. billionaires in 2001. Round to the second decimal place. What does your result mean in this situation?
During the week of January 12, 2012, the average number of viewers was 4.7 million viewers per day for the TV show Good Morning America and 2.2 million viewers for the competing The Early Show. Find the unit ratio of the average number of viewers per day of Good Morning America to the average
A recipe for roasted red-pepper pasta calls for 4 red bell peppers and 5 black olives. Calculate the given unit ratio. What does your result mean in this situation? a. The unit ratio of the number of red bell peppers to the number of black olives b. The unit ratio of the number of black olives to
A recipe for beef stroganoff calls for 2 cups of sliced mushrooms and 4 cups of cooked noodles. Calculate the given unit ratio. What does your result mean in this situation? a. The unit ratio of the number of cups of sliced mushrooms to the number of cups of cooked noodles b. The unit ratio of the
The full-time equivalent enrollment (FTE enrollment) at a college is the number of full time students it would take for their total credits (units or hours) to equal the total credits in which both part-time and full-time students combined are enrolled in one semester. The number of full-time
The 2014 populations and land areas are shown in Table 28 for various states.Round all unit ratios to the second decimal place: a. Find the unit ratio of New York€™s population to New Jersey€™s population. What does your result mean in this situation? b. Find the unit ratio of
A person has credit card balances of -4360 dollars on a Discover® account and -1825 dollars on a MasterCard® account. a. Find the unit ratio of the Discover balance to the MasterCard balance. Round the result to the second decimal place. b. If the person wishes to pay off both accounts gradually
A person has credit card balances of -6810 dollars on a Visa® account and -2950 dollars on a Sears® account. Round the result to the second decimal place. a. Find the unit ratio of the Visa balance to the Sears balance. b. If the person wishes to pay off both accounts gradually in the same amount
a. Find the sum -2 + (-4). b. Find the product -2(-4). c. Consider the following statements: • Two negative numbers make a positive. • A negative number times a negative number is equal to a positive number. Which statement is clearer? Explain.
a. Is 12/-4 positive or negative? Explain. b. If a is positive and b is negative, is a/b positive or negative? Explain. c. A student says that a/b is positive because it has no negative signs. Is the student correct? Explain.
The number of U.S. households with cable TV subscriptions was 61.8 million in 2009, and it decreased by approximately 1.5 million households for the period 2009€“2014.a. Complete Table 34 to help find an expression that stands for the number (in millions) of U.S. households with cable TV
U.S. wireless subscriber connections were 315.9 million in 2012, and they increased by 3.3% in 2013. What was the number of U.S. wireless subscriber connections in 2013?
Amazon.com’s net sales were $74.5 billion in 2012, and they increased by 22% in 2013. What were the net sales in 2013?
The worldwide revenue from recorded music was $15.6 billion in 2012, and it decreased by 3.9% in 2013. What was the revenue in 2013?
U.S. revenue from newspapers was $38.6 billion in 2012, and it decreased by 2.6% in 2013. What was the revenue from newspapers in 2013?
See Fig. 81.Use the fact that the total area of the object is 1 to find the area of the orange bar. The object has not been drawn to scale.
See Fig. 82.Use the fact that the total area of the object is 1 to find the area of the orange bar. The object has not been drawn to scale.
See Fig. 83.Use the fact that the total area of the object is 1 to find the area of the orange bar. The object has not been drawn to scale.
See Fig. 84.Use the fact that the total area of the object is 1 to find the area of the orange bar. The object has not been drawn to scale.
45,700,000 Write the number in scientific notation.
280,000 Write the number in scientific notation.
0.0000659 Write the number in scientific notation.
0.000023 Write the number in scientific notation.
-0.000001 Write the number in scientific notation.
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