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Bilik Melarikan Diri Sekolah
Gaya Bebas
Universiti
Matematik
AM025 Topic 8 (A17&19)
Shirley Hee
60
Masalah tambahan (11/ 20)
Allow incorrect answer
Sembunyikan jawapan
public kuiz

# 1

pilihan

What is correlation in statistics?

  • A measure of association between two variables
  • The cause of a phenomenon
  • A type of graph
  • A method of data collection

# 2

pilihan

What does a correlation coefficient of 0 mean?

  • No relationship between x and y.
  • Perfect positive relationship between x and y.
  • Perfect negative relationship between x and y.
  • Moderate relationship between x and y.

# 3

pilihan

What is regression analysis used for?

  • Predicting the value of a dependent variable
  • Determining the mean of a dataset
  • Creating a histogram
  • Measuring standard deviation

# 4

pilihan

What is the primary difference between correlation and regression?

  • Correlation measures strength; regression predicts values
  • Correlation uses graphs; regression does not
  • Regression uses tables; correlation does not
  • Both are the same

# 5

pilihan

What does the slope of the line in a linear regression represent?

  • The change in the dependent variable for a one-unit change in the independent variable
  • The average of the dataset
  • The intercept of the line
  • The total sum of all variables

# 6

jawapan pendek

In an investigation, 100 questions related to the importance of integrity was given to 8 employees of different ages. The results are shown in the table. Find the coefficient of correlation.

  • r=0.9056

  • 0.9056

petunjuk

Leave your answer in 4 decimal places.

In an investigation, 100 questions related to the importance of integrity was given to 8 employees of different ages. The results are shown in the table. Find the coefficient of correlation.

# 7

jawapan pendek

In an investigation, 100 questions related to the importance of integrity was given to 8 employees of different ages. The results are shown in the table. Find the regression line.

  • y=37.298+0.772x

  • y=37.2841+0.7724x

petunjuk

y=1.111+1.111x (3 decimal places) Or y=11.1111+1.1111x (4 decimal places)

In an investigation, 100 questions related to the importance of integrity was given to 8 employees of different ages. The results are shown in the table. Find the regression line.

# 8

jawapan pendek

A salesman is studying the relationship between age(x) and the price(y) of a model of hand phone. The following data is obtained. Find the coefficient of determination.

  • 0.9789

A salesman is studying the relationship between age(x) and the price(y) of a model of hand phone. The following data is obtained. Find the coefficient of determination.

# 9

jawapan pendek

A salesman is studying the relationship between age(x) and the price(y) of a model of hand phone. The following data is obtained. Predict the price of hand phone at age 10 months.

  • RM1236.79

  • RM1236.70

A salesman is studying the relationship between age(x) and the price(y) of a model of hand phone. The following data is obtained. Predict the price of hand phone at age 10 months.

# 10

jawapan pendek

The time spent in the gym fitness center(minutes) and the weight (kg) of seven randomly selected women are given in the table below. Estimate the weight of a woman who spent 40 minutes in the gym.

  • 64.3kg

  • 64.3 kg

petunjuk

Leave your answer in 1 decimal places.

The time spent in the gym fitness center(minutes) and the weight (kg) of seven randomly selected women are given in the table below. Estimate the weight of a woman who spent 40 minutes in the gym.

# 11

jawapan pendek

The following table shows the number of hours spent on sleep daily and the weight of body (in kg) of six boy students. Estimate the weight of a boy who spent 6.5 hours daily for sleep.

  • 84kg

  • 84 kg

The following table shows the number of hours spent on sleep daily and the weight of body (in kg) of six boy students. Estimate the weight of a boy who spent 6.5 hours daily for sleep.
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