Explanation

Mean = (6 + 8 + 10 + 12) ÷ 4

= 36 ÷ 4

= 9

Last verified on 15-05-2026

Explanation

Mean = (5 + 7 + 9) ÷ 3

= 21 ÷ 3

= 7

Last verified on 14-05-2026

Explanation

Find the mean of:

Numbers: 7, 6, 10, 8, 9

Frequencies: 2, 2, 5, 1, 2

Step 1: Multiply each number by frequency

7 × 2 = 14

6 × 2 = 12

10 × 5 = 50

8 × 1 = 8

9 × 2 = 18

Step 2: Sum of products

14 + 12 + 50 + 8 + 18 = 102

Step 3: Total frequency

2 + 2 + 5 + 1 + 2 = 12

Step 4: Mean

Mean = 102 ÷ 12 = 8.5

Last verified on 12-05-2026

Explanation

Mean = sum of numbers ÷ count of numbers  

= (4 + 6 + 8 + 10) ÷ 4  

= 28 ÷ 4  

= 7

Last verified on 09-05-2026

Explanation

Mode = value that appears most often  

4 appears 3 times, more than any other number  

Last verified on 08-05-2026

Explanation

Mean = (3 + 5 + 7 + 9 + 11) / 5 = 35 / 5 = 7  

Last verified on 07-05-2026

Explanation

Data is already ordered: 1, 3, 5, 7, 9  

n = 5, which is odd  

Median = middle value = 3rd term = 5  

Last verified on 06-05-2026

Explanation

Explanation

• Confidence sets show possible values of estimated parameters.
• For one coefficient, it is an interval (line).
• For two coefficients, it becomes a 2D region.
• That region is typically elliptical in shape.

Last verified on 22-04-2026

Explanation

Compare the probabilities:  

Getting odd on die = 0.33

Getting head on coin = 0.50

0.50 > 0.33, so getting a head is more likely.

Last verified on 14-04-2026