Keystone Practice - Data Analysis

Find the 20th term in the arithmetic sequence -4, 1, 6, 11, 16……

Hint: Use STAT on your calculator

• 95

• 72

• 96

• 91

Determine whether the sequence appears to be an arithmetic sequence. If so, find the common difference and the next three terms in the sequence. -5, -11, -17, -23, -29….

• Yes; common difference 6; next three terms are -23, -17, -11

• Not an arithmetic sequence

• Yes; common difference -7; next three terms are -36, -43, -50

• Yes; common difference -6; next three terms are -35, -41, -47

Sylvie is going on vacation. She has already driven 60 miles in one hour. Her average speed for the rest of the trip is 57 miles per hour. How far will Sylvie have driven 7 hours later?

• 402 miles

• 420 miles

• 459 miles

• 399 miles

Clara opens a bank account with some money. After opening the account, she deposits the same amount of money each week. She does not withdraw any money from the account. The list below shows how much money Clara has in her bank account at the end of each of the first four weeks. The pattern continues.

$214, $228, $242, $256

Which expression represents how much money, in dollars, Clara has in her bank account at the end of n weeks?

• 200 + 14n

• 214 + 14n

• 200n + 14

• 214n + 14

What is the range of the following set of numbers? {23, 45, 43, 46, 23}

• 0

• 13

• 23

• 1

What is the interquartile range of the ages?

• 38

• 47

• 22

• 40

Which of the data below could be described by the box-and-whisker plot above?

• {10, 32, 34, 37, 40, 42, 46, 49, 74}

• {10, 32, 34, 37, 38, 42, 46, 49, 74}

• {10, 32, 36, 37, 40, 42, 43, 49, 74}

• {10, 32, 36, 37, 38, 42, 43, 49, 74}

What is the interquartile range of the following box and whisker plot?

• 20

• 16

• 6

• 7

The daily high temperatures, in degrees Fahrenheit, of a town are recorded for one year. The median high temperature is 62 F. The interquartile range of high temperatures is 32. Which is most likely to be true?

• Approximately 25% of the days had a high temperature less than 30 F.

• Approximately 25% of the days had a high temperature less than 62 F.

• Approximately 50% of the days had a high temperature less than 62 F.

• Approximately 75% of the days had a high temperature less than 94 F.

What is the interquartile range of the following set of numbers? {398, 464, 486, 524, 505, 421, 442}

• 107

• 84

• 126

• 464