# Question: Construct a 90 confidence interval to estimate the population mean

Construct a 90% confidence interval to estimate the population mean using the following data:

= 85 σ = 20 n = 10

What assumptions need to be made to construct this interval?

= 85 σ = 20 n = 10

What assumptions need to be made to construct this interval?

## Answer to relevant Questions

A recent trend in the auto financing market is an increase in the length of new car loans. According to Experian, 11% of new car loans in 2009 were between 73 and 84 months in length. Suppose a random sample of 260 new cars ...A local church has a congregation composed of 362 members. The church’s administrators would like to find out how the congregation would react if the church moved its 11: 00 a.m. service to 10: 00 a.m. A random sample of ...Calculate the p value for the following conditions and determine whether to reject the null hypothesis: a. One tail test, zx = 1.50, and σ = 0.05 b. One tail test, zx = 2.25, and σ = 0.02 c. Two tail test, zx = 2.10, ...Suppose the average size of a new house built in a certain county in 2010 was 2,272 square feet. A random sample of 25 new homes built in this county was selected in 2014. The average square footage was 2,190, with a sample ...Consider the following hypotheses: H0: p = 0.69 H1: p ≠ 0.69 Given that p¯ = 0.606, n = 160, and σ = 0.05, answer the following questions: a. What conclusion should be drawn? b. Determine the p value for this test.Post your question