📊 statistics
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Correlation Strength
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
Data Percentile
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
Z Score Calculation
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
Z Score Calculation
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,
Z Score Computation
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
Distribution Shape
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
Mean Time
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
Frequency Sum
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
Price Stats
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
Correlation Relationship
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
Correlation Heights Weights
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
Correlation Coefficient
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
Life Expectancy
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
Social Media Association
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
Correlation Test
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
Confidence Interval
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
Profit Prediction
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
Social Media Correlation
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
Center Spread Data
1. Problem 1: Test Scores \nFind mode, median, mean, lower quartile (Q1), upper quartile (Q3), interquartile range (IQR), and population standard deviation.\nData: 37, 42, 48, 51,
Difference Mean
1. The problem is to find the difference between the mean scores of Cris and Andrew.
2. First, calculate the mean score for Cris. Scores: $80, 30, 72, 80, 62$
Data Summary
1. The problem involves understanding or analyzing the sequence of numbers provided: 80, 30, 72, 80, 62.
2. We first observe these numbers and check for any patterns or relationshi