A survey shows that 25% of people listen to the radio daily. If a group of 125 people are surveyed, what is the probability that more than 40 people will have listened to the radio today?

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1)Shoppers were asked how much money they were going to spend today in the mall. The mean dollars was $250 with a standard deviation of $15. Find the probability that the sum of 121 values is more than $30,500.
Use the Central Limit Theorem for Sums.

2)Coffee shop customers were asked how much they were willing to pay for a large cup of plain coffee. A total of 49 customers answered with a mean of $6, with a standard deviation of $4. Given a z-score of 0.75, what is the sum of what customers are willing to pay for coffee?

3)A survey shows that 32% of people listen to the radio daily. If a group of 225 people are surveyed, what is the probability that between 70 and 80 people will have listened to the radio today?

4)Tom is a basketball player that historically makes 56% of his free throws. While practicing on day, he attempts to make 300 free throws. What it the probability that he makes more than 150 of the attempts

Use the Central Limit Theorem for Sums

5)A survey shows that 25% of people listen to the radio daily. If a group of 125 people are surveyed, what is the probability that more than 40 people will have listened to the radio today?

6)According to the Nielsen Company, the mean number of TV sets in a U.S. household in 2008 was 2.83. Assume the standard deviation is 1.2. A sample of 85 households is drawn. What is the probability that the sample mean number of TV sets is beween 2.5 and 3.0?

 

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