# Question: A z a 2 for the 99 confidence interval

a. z a / 2 for the 99% confidence interval

b. z a / 2 for the 98% confidence interval

c. z a / 2 for the 95% confidence interval

d. z a / 2 for the 90% confidence interval

e. z a / 2 for the 94% confidence interval

b. z a / 2 for the 98% confidence interval

c. z a / 2 for the 95% confidence interval

d. z a / 2 for the 90% confidence interval

e. z a / 2 for the 94% confidence interval

**View Solution:**## Answer to relevant Questions

A random sample of stock prices per share (in dollars) is shown. Find the 90% confidence interval for the variance and standard deviation for the prices. Assume the variable is normally distributed. Find the 90% confidence interval for the variance and standard deviation for the lifetimes of inexpensive wristwatches if a sample of 24 watches has a standard deviation of 4.8 months. Assume the variable is normally ...In a sample of 200 people, 154 said that they watched educational television. Find the 90% confidence interval of the true proportion of people who watched educational television. If the television company wanted to ...Obesity is defined as a body mass index (BMI) of 30 kg/m2 or more. A 95% confidence interval for the percentage of U.S. adults aged 20 years and over who were obese was found to be 22.4 to 23.5%. What was the sample size? A random sample of 205 college students were asked if they believed that places could be haunted, and 65 responded yes. Estimate the true proportion of college students who believe in the possibility of haunted places with ...Post your question