Mandy's dog will be having four puppies. Mandy performs a simulation by tossing a coin to model whether these
puppies will be male or female.
• Let heads (H) = female puppy
. Let tails (T) = male puppy
The results of the simulation are:
1. THTT 6.
2. TTTH 7. HTHT
3. TTHH 8. HHHT
4. HTTT
9. THTH
5.
10.
What is the estimated probability that at least two of the puppies will be
female?

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.

Tim has obtained a 3/27 balloon mortgage. after the initial period, he decided to refinance the balloon payment with a new 30-year mortgage. how many years will he be paying for his mortgage in total?