In a study conducted in the United Kingdom about sleeping positions, 1000 adults in the UK were asked their starting position when they fall asleep at night. The most common answer was the fetal position (on the side, with legs pulled up), with 41 % of the participants saying they start in this position. Use a normal distribution to find a 99% confidence interval for the proportion of all UK adults who start sleep in this position. Use the fact that the standard error of the estimate is 0.016. Round your answers to three decimal places. The 99% confidence interval is i to i

An insurance company selected samples of clients under 18 years of age and over 18 and recorded the number of accidents they had in the previous year. We are interested in determining if the accident proportions differ between the two age groups. The results are shown below. a =0.05 Under age of 18 Over age of 18 n₂ =500 n₁ = 480 Number of accidents = 160 Number of accidents = 140 The test statistic is A 90% confidence interval for the proportion between two age groups is approximately Given a 5% level of significance, what decision should be reached about the null hypothesis

A simple random sample of 1000 people age 18 or over is taken in a large town. It turns out that 189 people in the sample are newspaper readers. Calculate a 95%-confidence interval for the percentage of people (age 18 and over) in that town who read newspapers.

In a random sample of 250 students who enrolled in Science, 150 took notes duringclasses. Find an approximate 95% confidence interval for the population proportion of students who takes notes in their Science classes.