📊 statistics

1. **Stating the problem:** We have a dataset of 40 salesmen's undergraduate units earned: 48, 60, 96, 78, 120, 54, 72, 72, 102, 108, 96, 107, 52, 60, 66, 120, 41, 60, 118, 65, 85,

1. **Problem statement:** We have petrol consumption data (miles per gallon, m.p.g.) for cars with the same engine size at different speeds (m.p.h.). We want to: a. Plot a scatter

1. **Problem statement:** We have 14 students' scores for Chemistry (independent variable, x) and ITGS (dependent variable, y). We need to plot the points, describe their correlati

1. نحدد معامل الارتباط الأقوى بناءً على القيمة المطلقة للمعامل لأننا نهتم بالقوة بغض النظر عن الإيجابية أو السلبية. - (1 , -0.0) القيمة المطلقة 0.0

1. Stating the problem: We have the data set: 108, 200, 310, 150, 180, 119, 160, 180, 201, 190, 280, 202, and we want to convert the given values (z-score, population, sample) into

1. The problem is to calculate the z-score for the given bill amounts assuming we have sample data. 2. First, calculate the sample mean $\bar{x}$ by summing all the values and divi

1. The problem involves calculating the z-score for a list of values relative to a population and a sample. 2. First, let's define the dataset: $108, 200, 310, 150, 180, 119, 160,

1. The problem involves analyzing the data set: 108, 200, 310, 150, 180, 119, 160, 180, 201, 190, 280, 202. We will calculate z-scores for these data points considering both popula

1. The problem asks which histogram shape is not true about the distribution shape described. 2. Histogram A is described as bell-shaped and symmetric, which matches the "Bentuk Lo

1. The problem gives us a frequency table showing time intervals and how many students took that amount of time to answer a question. We need to calculate the mean time spent by a

1. Given a frequency table with classes and cumulative frequencies, we need to find $X+Y$. 2. From the table, the cumulative frequency for the second class interval ($15-19$) is 11

1. **State the problem:** We have prices of 8 items in 2001 and 2021. We need to find the mean and standard deviation for both years, then calculate the covariance and correlation

1. Problem: We are asked to describe the relationship between heights and weights of 50 individuals using the correlation coefficient. 2. To find the correlation coefficient $r$, w

1. The problem asks us to describe the relationship between heights and weights of 50 individuals using the correlation coefficient. 2. The correlation coefficient $r$ measures the

1. **State the problem:** We are asked to find and describe the correlation coefficient, which measures the relationship between heights and weights of 50 individuals. 2. **Organiz

1. We are given data points for Year of Birth (x) and Life Expectancy (y). We need to find the correlation coefficient $r$ and determine if it is significant. 2. First, list the da

1. **State the Problem:** We want to test if there is an association between social media usage (x) and reading performance (RA, y). 2. **Null Hypothesis ($H_0$):** There is no ass

1. **State the problem:** We want to test whether social media usage ($x$) affects reading performance ($y$) of students. 2. **Define the null hypothesis ($H_0$):** There is no ass

1. **State the problem:** We want to find the 95% confidence interval for the average daily sales of a café based on a sample of 20 days, where the sample mean is $4800$ and the sa

1. **State the problem:** We are given the average annual profit ($\overline{y} = 9660$), the standard deviation ($s_y = 3010$), and the correlation coefficient ($r = 0.9987$) betw

1. **State the problem:** Determine if there is an association between social media usage (x) and reading performance (RA, y) among students. 2. **Null hypothesis (H0):** There is