#3 Step 2. Construct the 80% confidence interval. Round your answers to the nearestwhole number.Answer: Lower endpoint: 1681.45972Upper endpoint: 2430. 540283.A student researcher compares the ages of cars owned by students and cars owned byfaculty at a local state college. A sample of 235 cars owned by students had an averageage of 6.94 years. A sample of 280 cars owned by faculty had an average age of 6.99years. Assume that the population standard deviation for cars owned by students is3.55 years, while the population standard deviation for cars owned by faculty is 2.87years. Determine the 98% confidence interval for the difference between the truemean ages for cars owned by students and faculty.Step 1. Find the critical value that should be used in constructing the confidenceinterval.Answer:Step 2. Construct the 98% confidence interval. Round your answers to two decimalplaces.Answer: Lower endpoint:Upper endpoint:The birth weights for two groups of babies were compared in a study. In one group themothers took a zinc supplement during pregnancy. In another group, the mothers tooka placebo. A sample of 269 babies in the zinc group had a mean birth weight of 3305grams. A sample of 276 babies in the placebo group had a mean birth weight of 3061grams. Assume that the population standard deviation for the zinc group is 860 grams,while the population standard deviation for the placebo group is 524 grams. Determinethe 98% confidence interval for the true difference between the mean birth weights for"zinc" babies versus "placebo" babies.4.

Name: #3 Step 2. Construct the 80% confidence interval. Round your answers t
Uploaded: 2024-03-20T07:06:41.000Z
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Description: #3 Step 2. Construct the 80% confidence interval. Round your answers to the nearestwhole number.Answer: Lower endpoint: 1681.45972Upper endpoint: 2430. 540283.A student researcher compares the ages of cars owned by students and cars owned byfaculty a