Bài 29. Để so sánh hiệu quả của hai loại vắcxin A và B dùng chữa bệnh cúm gà. Người ta tiến hành một quan sát như sau:

- Dùng loại Vắcxin A chữa cho 120 con gà có 85 con khỏi.

- Dùng loại Vắcxin B chữa cho 90 con gà cùng đàn có 71 con khỏi.

Với mức ý nghĩa 5% hãy cho kết luận về tỷ lệ gà được chữa khỏi bệnh cúm khi dùng hai loại vắcxin nói trên có tương đương không?
Mn giúp em với ạ

The table shows population statistics for the ages of best actor and best supporting actor winners at an awards ceremony. the distributions of the ages are approximately bell-shaped. compare the z-scores for the actors in the following situation. best actor best supporting actor muequals42.0 muequals49.0 sigmaequals7.3 sigmaequals15 in a particular year, the best actor was 59 years old and the best supporting actor was 45 years old. determine the z-scores for each. best actor: z equals best supporting actor: z equals (round to two decimal places as needed.) interpret the z-scores. the best actor was (more than 2 standard deviations above more than 1 standard deviation above less than 1 standard deviation above less than 2 standard deviations below) the mean, which (is not, is) unusual. the best supporting actor was (less than 1 standard deviation below more than 1 standard deviation above more than 2 standard deviations below more than 1 standard deviation below) the mean, which (is is not) unusual.

1. if we have 3 babies what is the probability they’re going to be all boys? 2. if we roll 2 die at the same time what is the probability of getting less than 10 on the first roll and a 5 on the second roll 3. if we have 3 babies what is the probability their is going to be 2 girls? 4. if we have 3 babies what is the probability of having no more than 1 girl? 5. it we have 3 babies and then have another 3 babies what is the probability of us having at least 1 boy and then having all girls?

Which of the following contains a variable?