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1. A random sample of 640 adults in a large country was asked “Do you need...

1. A random sample of 640 adults in a large country was asked “Do you need a haircut?” Of the 640 adults surveyed, 283 indicated that they need a haircut.

1a. Check the requirements needed to construct a confidence interval for the population proportion.

1b. Find a 95% confidence interval for the population proportion of adults who need a haircut.

1c. Could exactly 25% of the country need a haircut?

2. In a survey of 2000 students, 1638 of them thought that the prices in the school cafeteria were too high.

2a. Find a point estimate for the proportion of the school that thinks the prices in the school cafeteria are too high.

2b. Which requirement might not be met here?

2c. Find a 90% confidence interval for the proportion of the school that thinks the prices in the school cafeteria are too high.

Math   Statistics-And-Probability   
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My dear student I am allowed to solve one question at a time so I am solving the first question in the pic thank you

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