The average production cost for major movies is 60 million dollars and the standard deviation is 22 million dollars. Assume the production cost distribution is normal. Suppose that 37 randomly selected major movies are researched. Answer the following questions. Give your answers in millions of dollars, not dollars. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N( 60 22 b. What is the distribution of ? - N( 60 3.62 c. For a single randomly selected movie, find the probability that this movie's production cost is between 56 and 59 million dollars. 0.0515 d. For the group of 37 movies, find the probability that the average production cost is between 56 and 59 million dollars. e. For part d), is the assumption of normal necessary? O NoO Yes

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Hi I did the first three and need help with the last! Thanks:)
The average production cost for major movies is 60 million dollars and the standard deviation is 22
million dollars. Assume the production cost distribution is normal. Suppose that 37 randomly
selected major movies are researched. Answer the following questions. Give your answers in
millions of dollars, not dollars. Round all answers to 4 decimal places where possible.
a. What is the distribution of X? X ~ N( 60
22
b. What is the distribution of ? ~ N( 60
3.62
c. For a single randomly selected movie, find the probability that this movie's production cost is
between 56 and 59 million dollars. 0.0515
d. For the group of 37 movies, find the probability that the average production cost is between
56 and 59 million dollars.
e. For part d), is the assumption of normal necessary? O NoO Yes
Transcribed Image Text:The average production cost for major movies is 60 million dollars and the standard deviation is 22 million dollars. Assume the production cost distribution is normal. Suppose that 37 randomly selected major movies are researched. Answer the following questions. Give your answers in millions of dollars, not dollars. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N( 60 22 b. What is the distribution of ? ~ N( 60 3.62 c. For a single randomly selected movie, find the probability that this movie's production cost is between 56 and 59 million dollars. 0.0515 d. For the group of 37 movies, find the probability that the average production cost is between 56 and 59 million dollars. e. For part d), is the assumption of normal necessary? O NoO Yes
Expert Solution
Step 1:-

Let average of production is Y

Y= X bar

We know that Z score is given by,

Z= (Y- mu)/sigma

Where mu is mean of Y and sigma is standard deviation of Y.

Mu= 60

Sigma = 3.62

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