What did Galton use to calculate how strong the relationship was for the line of best fit?

A torch and a battery cost £2.50 altogether. The torch costs £1.50 more than the battery. What fraction of the total price is the torch? Give your answer in its simplest form.

What is an opposite like in negatives and stuff?

The amount of time a certain brand of light bulb lasts is normally distribued with a mean of 1800 hours and a standard deviation of 35 hours. Using the empirical rule, what percentage of light bulbs last between 1765 hours and 1835 hours?

Your parents are buying a house for 187,500. They have a good credit rating, are making a 20% down payment, and expect to pay 1,575/month. The interest rate for the mortgage is 4.65%. What must their realized income be before each month?

If you have a 1 in 10 chance of winning, how many times will you need to try to win 1 time

What is the value of x in the equation 1,331 x ^3 - 216 = 0? A. - 6/11 B. 11/6 C. 1/6 D. 6/11

A stockbroker is offered a flat monthly salary of $2200 or a salary of $1500 plus 4% of the total value of all stock transactions he processes during the month if he chooses the $2200 salary what dollar amount is he expecting to transact each month

the number of hot peppers in a salad is based on the number of servings as as shown in the table servings 2,4,8,12 hot peppers 4,8,?,24

The average of the first 3 weights was 20 pounds. The average of the next 12 weights was 25 pounds. What was the overall average of the weights

Use the matrix method to solve: x + 4y8 2x+y 9