Question

A class teacher created the stem-and-leaf plot showing each day’s class attendance.

Answer the questions (4) - (6) based on Figure 3.2.A.

a)What was the maximum number of students that attended class on any one day?
b)On how many days were there less than 25 students in the class?
c)On how many days were there 34 students in the class?
d)If the median of the dataset xi ,i=1,2,...,n, is 12, what is the median of the dataset 3xi +4, i=1,....,n?
e)The sample mean and sample variance of five data values are, respectively 13.6 and 25.8. If three of the data values are 7, 13 and 20, what are the other two data values? ________, ________.
f)The sample standard deviation of the dataset 2, a, 12, 18, and 30 is 10.8 (correct upto one decimal place), where a is an unknown quantity. Then, the value of the sample variance of the new dataset that is obtained by adding 5 to each number of the given dataset is __________.
g)Let the sample mean of a set of 20 data points be 30. If it is discovered that a data point having value 25 was incorrectly entered as 15, what should be the revised value of the sample mean?

Answer 1

Journey from Samarqand to Damascus had a lot of cities in its route. Samarqand was located in the North east of the Islamic state and Damascus was situated in the centre (Syria). A traveller journeying from Samarqand to Damascus had to pass through the cities of Merv, Nishapur, and Samarra etc.$\huge\underbrace\mathfrak\color{teal}ᴀɴsᴡᴇʀ$

Answer 2

Answer:

What was the maximum number of students that attended class on any one day?

45

On how many days were there less than 25 students in the class?

5

On how many days were there 34 students in the class?

0

Step-by-step explanation: