Solution-Normal distribution to approximate the binomial

Normal distribution to approximate the binomial distribution

Reference no: EM132522275

-An economist is interested in studying the incomes of consumers in a particular country. The population standard deviation is known to be $1,000. What sample size would the economist need to use for a 95% confidence interval if the width of the interval should not be more than $100?

-. To use the normal distribution to approximate the binomial distribution, we need ______ and ______ to be at least 5.

-A poll was conducted by the marketing department of a video game company to determine the popularity of a new game that was targeted to be launched in three months. Telephone interviews with 1,500 young adults were conducted which revealed that 49% said they would purchase the new game. The margin of error was ±3 percentage points. What is the needed sample size to obtain a 95% confidence interval estimate of the percentage of the targeted young adults who will purchase the new game by allowing the same level of margin of error?

Reference no: EM132522275

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Normal distribution to approximate the binomial distribution

Reference no: EM132522275

Reference no: EM132522275

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