In: Statistics and Probability
7. An index of movie quality in a movie theatre says that the overall fun of every visit to a movietheatre is determined for 25% by who the main star is in the movie, for 25% percent by the quality of the popcorn in the movie theatre and by 50% by the story of the movie. Somebody gives the newest movie 6 points for the star, 3 points for the movie theatre and 8 points for the story. How many overall points is this movie scoring on this index?
8. Somebody sends 10 postcards in the mail. 3 postcards arrived in 2 days on their destination, 4 in 3 days, and 3 in 7 days. What is the average arrival time of the postcards?
Q7. From the given data.
The Index based on 25% rating for the the main star is in the movie or 25% percent by the quality of the popcorn in the movie theatre and by 50% by the story of the movie.
Somebody gives the newest movie 6 points for the star, 3 points for the movie theatre and 8 points for the story.
Then overall points is this movie scoring on this index given by
Hence the overall points this movie scoring on this index are 6.25.
Q8. From the given data:
The chance of arriving a postcards in 2 days =3/10
The chance of arriving a postcards in 3 days =4/10
The chance of arriving a postcards in 7 days =3/10
Therefore the average arrival time of the postcards is given by:
the average arrival time of the postcards is 3.9 days.
That is approximately 4 days.