Stat quizizz 2

Use the given frequency distribution to find the

(a) class width.

(b) class midpoint of the first class.

(c) class boundaries of the first class.

• (a) 2

  (b) 51.5

  (c) 50-52

• (a) 3

  (b) 51

  (c) 50-52

• (a) 2

  (b) 51.5

  (c) 49.5-52.5

• (a) 3

  (b) 51

  (c) 49.5-52.5

Use the ogive to the right to approximate the sample size

• 341

• 80

• 28

• 100

The frequency distribution below summarizes the home sale prices in the city of Summerhill for the month of June.

Determine the width of each class

A nurse measured the blood pressure of each person who

visited her clinic. To the right is a relative-frequency histogram

for the systolic blood pressure readings for those people aged

between 25 and 40. The blood pressure readings were given

to the nearest whole number. Identify the center of the third

class.

What is the difference between class limits and class boundaries?

• Class limits are the numbers that separate classes without forming gaps between them. Class boundaries are the least and greatest numbers that can belong to the class. For integer data, the corresponding class limits and class boundaries differ by 1.

• Class limits are the numbers that separate classes without forming gaps between them. Class boundaries are the least and greatest numbers that can belong to the class. For integer data, the corresponding class limits and class boundaries are the same

• Class limits are the numbers that separate classes without forming gaps between them. Class boundaries are the least and greatest numbers that can belong to the class. For integer data, the corresponding class limits and class boundaries differ by 0.5

• Class limits are the least and greatest numbers that can belong to the class. Class boundaries are the numbers that separate classes without forming gaps between them. For integer data,

  the corresponding class limits and class boundaries are the same.

• Class limits are the least and greatest numbers that can belong to the class. Class boundaries are the numbers that separate classes without forming gaps between them. For integer data,

  the corresponding class limits and class boundaries differ by 0.5

What is the difference between relative frequency and cumulative frequency?

• Relative frequency of a class is the proportion of the data in that class, while cumulative frequency of a class is the number of observations in that class

• Relative frequency of a class is the percentage of the data that falls in that class, while cumulative frequency of a class is the sum of the frequencies of that class and all previous

  classes.

• Relative frequency of a class is the number of observations in that class, while cumulative frequency of a class is the sum of all the frequencies

• There is no difference between the two

Use the given minimum and maximum data entries, and the number of classes, to find the class width,

minimum= 13, maximum= 84, 7 classes

The class width is=

Use the frequency histogram to complete the following parts.

Determine the number of classes

Use the frequency histogram to complete the following parts.

The least frequency is about

Use the frequency histogram to complete the following parts.

The class width is