📊 statistics

1. **Problem Statement:** We are given world population data points for the years 1990, 2000, and 2010, with populations 5300 million, 6100 million, and 6800 million respectively.

1. **Problem Statement:** We have a grouped frequency distribution with score intervals (Skor) and frequencies (fi). We need to find the class midpoints (Titik Tengah Kelas, $X_i$)

1. **State the problem:** We have a 2x3 frequency table with rows $y_1, y_2$ and columns $x_1, x_2, x_3$. The frequencies are: $$\begin{array}{c|ccc}

1. **State the problem:** We have a 2x3 data table with values: $$\begin{array}{c|ccc}

1. **Stating the problem:** We want to construct a frequency marginal distribution from a joint frequency distribution table. 2. **Understanding the concept:** A frequency marginal

1. **Problem Statement:** We need to find the least-squares regression line for predicting the distance a baseball travels (response variable $y$) based on the speed at which it wa

1. **State the problem:** We have a frequency distribution with class intervals and their frequencies. We want to find: i) The position of the median value.

1. **Stating the problem:** We are given a set of data points relating distance (in feet) to speed (in mph). We want to analyze or predict the speed corresponding to a distance of

1. The problem discusses how the level of measurement of data affects the type of descriptive statistics used. 2. There are four main levels of measurement: nominal, ordinal, inter

1. The problem involves understanding the four scales of measurement: Ratio Scale, Interval Scale, Ordinal Scale, and Nominal Scale. 2. These scales are used in statistics and rese

1. The problem discusses how the level of measurement of data affects the type of descriptive statistics used. 2. There are four main levels of measurement: nominal, ordinal, inter

1. **Problem Statement:** Given the rainfall data for different sub-divisions in 2023, find: (i) The modal class.

1. The problem involves understanding the parameters of a normal distribution, where $\sigma$ represents the standard deviation and $\mu$ represents the mean. 2. Given $\sigma = 2.

1. **State the problem:** We are given the monthly income ($x$) and expenditure ($y$) of five educators and need to find the Pearson's correlation coefficient $r$ between $x$ and $

1. **Stating the problem:** We are given the monthly income ($x$) and expenditure ($y$) of five educators and asked to find the correct linear regression equation from the options.

1. **Problem Statement:** We want to find how many derma-rollers out of a sample of 250 will last between 1.5 years and 2.5 years, given that the lifetimes are normally distributed

1. **Problem Statement:** We are given that the lifetimes of derma-rollers are normally distributed with a mean $\mu = 2$ years and a standard deviation $\sigma = 0.5$ years (6 mon

1. The problem: Find the mode of a data set. 2. Definition: The mode is the value that appears most frequently in a data set.

1. **State the problem:** We have frequency data of physical punishment administered by parents in three social classes (Working, Middle, Upper) over a week. We want to determine i

1. **State the problem:** We are given a data set with mean = 26.5, median = 29.0, and mode = 31.7. We need to determine the skewness of the data. 2. **Recall the relationship betw

1. **Problem Statement:** Determine which statement about the normal distribution is true among the options given. 2. **Recall the properties of the normal distribution:**