Please help explain below questions with null and alternative hypothesis along with calculations and which test was conducted.

1. Johnson Controls wanted to see if there are any differences in the number of customers across its four sales regions. Its analysis yielded the following results:

East North South

4035 45 80

(Assume a= .05)

2. Due to its current advertising, the makers of Geritol feel that the usage of the product among men is different from usage among women. Based on the survey data presented below, can we conclude that there is? a statistically significant relationship between gender and product usage, at the 95% confidence level?

Men:Users = 70 Non-Users= 180

Women: Users= 90 Non-Users = 60

3. A company is testing the recall of its advertising among its male and female customers. A total of 50 men and 75 women were called. It was found that 25 men remembered the ads and 25 men could _ not remember them. On the other hand, 45 women remembered the ads, while 30 women could not. Based on this data, can we say that ad recall is related to gender?(Assume a= .01)