Suppose a sample of 1042 tenth graders is drawn. Of the students sampled, 865 read above...

Suppose a sample of 1042 tenth graders is drawn. Of the students sampled, 865 read above the eighth grade level. Using the data, construct the 90% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level. Round your answers to three decimal places.

I need help figuring out the formula for this problem.

Expert Solution

We have given,

x=1042-865=177
n=1042
Estimate for sample proportion=   0.1699
Level of significance is =1-0.90=0.1
Z critical value(using Z table)=1.645

Confidence interval formula is

=(0.151,0.189)

Lower limit for confidence interval=0.151

Upper limit for confidence interval=0.189

milcah answered 4 months ago

Suppose a sample of 2339 tenth graders is drawn. Of the students sampled, 1942 read above...

Suppose a sample of 2339 tenth graders is drawn. Of the students sampled, 1942 read above the eighth grade level. Using the data, construct the 99% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level. Round your answers to three decimal places.

Suppose a simple random sample of 90 students from this district is drawn. What is the...

Suppose a simple random sample of 90 students from this district is drawn. What is the probability that at least half of them have either brown or green eyes? (Use technology. Round your answer to three decimal places.) brown eyes is 40%, green eyes is 20%.

The data for this exercise are from a sample of twelfth-graders. The students were asked how...

The data for this exercise are from a sample of twelfth-graders. The students were asked how often they wear a seat belt while driving, and for this exercise, we combine the responses for "never" and "rarely" and for "most times" and "always" and ignore the "sometimes" responses. A contingency table of the results for males and females follows. Seat Belt Use Most Times or Always Rarely or Never Total Female 964 101 1065 Male 914 269 1183 Total 1878 370...

A sample of size 30 students is to be drawn from a population consisting of 300...

A sample of size 30 students is to be drawn from a population consisting of 300 students belonging to two colleges A and B. the mean and standard deviations of their marks are given below: Strata Total number of students Ni Mean Standard deviation σi College A 200 30 10 College B 100 60 40 Total 300 90 50 How would you draw the sample using proportional allocation techniques? Hence, obtain the variance of the estimate of the population mean...

Question 3: A sample of size 30 students is to be drawn from a population consisting...

Question 3: A sample of size 30 students is to be drawn from a population consisting of 300 students belonging to two colleges A and B. the mean and standard deviations of their marks are given below: Strata. | Total student | mean | sd. College A | 200. | 30 | 10 College B. | 100 | 60 | 40 Total | 300 | 90 | 50 Q1)How would you draw the sample...

A random sample of 4 college students was drawn from a large university. Their ages are...

A random sample of 4 college students was drawn from a large university. Their ages are 22, 17, 23, and 20 years. a) Test to determine if we can infer at the 5% significance level that the population mean is not equal to 20. b) Interpret your conclusion.

Suppose that a sample of size 3 is drawn from a population consisting of the six...

Suppose that a sample of size 3 is drawn from a population consisting of the six values 4, 8, 5, 3, 8, and 4, and that the proportion of values that are greater than 4 is recorded. Find the sampling distribution of this statistic by listing all possible such samples of size 3. Find the mean and variance of the sampling distribution.

A population proportion is 0.57. Suppose a random sample of 663 items is sampled randomly from...

A population proportion is 0.57. Suppose a random sample of 663 items is sampled randomly from this population. a. What is the probability that the sample proportion is greater than 0.59? b. What is the probability that the sample proportion is between 0.52 and 0.59? c. What is the probability that the sample proportion is greater than 0.55? d. What is the probability that the sample proportion is between 0.52 and 0.53? e. What is the probability that the sample...

A population proportion is 0.59. Suppose a random sample of 663 items is sampled randomly from...

A population proportion is 0.59. Suppose a random sample of 663 items is sampled randomly from this population. Appendix A Statistical Tables a. What is the probability that the sample proportion is greater than 0.60? b. What is the probability that the sample proportion is between 0.54 and 0.64? c. What is the probability that the sample proportion is greater than 0.57? d. What is the probability that the sample proportion is between 0.52 and 0.55? e. What is the...

A population proportion is 0.60. Suppose a random sample of 660 items is sampled randomly from...

A population proportion is 0.60. Suppose a random sample of 660 items is sampled randomly from this population. Appendix A Statistical Tables a. What is the probability that the sample proportion is greater than 0.62? b. What is the probability that the sample proportion is between 0.56 and 0.62? c. What is the probability that the sample proportion is greater than 0.59? d. What is the probability that the sample proportion is between 0.58 and 0.59? e. What is the...

Question