📊 statistics

1. The problem is to understand the difference between a bar chart and a histogram. 2. A bar chart is a graphical representation of categorical data with rectangular bars where the

1. The problem asks about the features of a frequency distribution polygon and whether it has any other names. 2. A frequency distribution polygon is a graphical representation of

1. The problem asks: Where are class boundaries and class limits used? 2. Class limits and class boundaries are concepts used in statistics, especially in grouping data into classe

1. Let's start by stating the problem: You want to understand the difference between class boundaries and class limits in statistics. 2. Class limits are the smallest and largest v

1. **State the problem:** Organize the given data into a grouped frequency table. 2. **Data given:** 15.0, 17.4, 10.3, 9.2, 20.7, 18.9, 16.6, 22.4, 23.7, 18.6, 26.1, 16.5, 19.7, 12

1. **State the problem:** Calculate the median from the given frequency distribution and find the number of students getting marks between the first and third quartile. 2. **Given

1. **Problem Statement:** We are given data on sunlight hours per day and corresponding plant heights. We need to calculate the correlation between sunlight and height and fit a re

1. **Problem:** Find the area between $z=2$ and $z=3$ using the z-table. 2. **Formula and rules:** The area between two z-values $z_1$ and $z_2$ on the standard normal curve is giv

1. **State the problem:** We have a population with values $\{2,4,8,10,5\}$. We want to list all possible samples of size 3, find their sample means, and construct the sampling dis

1. **State the problem:** We are given the ages (in months) at which eight children first walked: 12, 11, 16, 19, 10, 12, 12, 13. We need to calculate the mean and standard deviati

1. **Stating the problem:** We are given the distribution of parents' job status for students in classes A, B, and C. We need to determine which class has the most varied (heteroge

1. **Stating the problem:** We have data on the status pekerjaan (job status) of parents of students in classes A, B, and C. We want to determine which class has the most variation

1. **Problem Statement:** Find the area between $z=0$ and given $z$-scores using the z-table (standard normal distribution).

1. **Problem Statement:** Find the area under the standard normal curve between $z=0$ and given $z$-values using the z-table.

1. The problem is to identify examples of parameters and statistics in different situations. 2. A parameter is a numerical value that describes a characteristic of an entire popula

1. **Problem:** Find the point estimate for the average time spent in the store for all customers based on a sample. 2. **Formula:** The point estimate for the population mean is t

1. **Stating the problem:** We are given a frequency distribution with class intervals, real limits, frequencies, and relative frequencies. We want to understand how to calculate t

1. **State the problem:** We need to find how many students obtained marks greater than the average marks of the class based on the given histogram data. 2. **Data from histogram:*

1. **State the problem:** We need to find the percentage of schools charging a monthly fee below 150. 2. **Identify the data:** The number of schools for each fee category is:

1. **Stating the problem:** We have a data set with mean $\mu = 7$, variance $\sigma^2 = 2$, and range $R = 3$. Each data point is transformed by multiplying by 2 and then adding 5

1. **ปัญหา:** ข้อมูลชุดหนึ่งมีค่าควอไทล์ที่ 3 (Q3) มากกว่าควอไทล์ที่ 1 (Q1) อยู่ 10 และสัมประสิทธิ์ของส่วนเบี่ยงเบนควอไทล์ (Coefficient of Quartile Deviation) เท่ากับ $\frac{1}{3}$