Math 232: Task 9 Heights (cm) of a random sample of students at a small Midwestern...
can you provide me with step to step workout . 6 With a sample size of 177, a 95% confidence interval for the height of 9-year old male US children is (54.0, 54.8), Indicate which of the following is a true statement A. All samples of size 177 of the population of 9-year old male US children will generate confidence intervals of (54.0, 54.8). B. The probability is 0.05 that a randomly selected 9-year old male US child will be...
Independent random samples were selected from two quantitative populations, with sample sizes, means, and standard deviations given below. n1 = n2 = 60 x1 = 125.3 x2 = 123.4 s1 = 5.7 s2 = 6.1 a) Construct a 95% confidence interval for the difference in the population means (μ1 − μ2). (Round your answers to two decimal places.) to b) Find a point estimate for the difference in the population means. c) Calculate the margin of error. (Round your answer...
A random sample of community college students was asked the number of hours they sleep on a typical week-night during a given academic term. The sample data are as follows: 8 6 4 5 3 7 S 4 3 4 4 5 6 8 7 7 7 3 3 4 What is the 90% confidence interval estimate for the true mean amount of sleep time per night spent by community college students during a academic term? a) The data give...
Independent random samples were selected from two quantitative populations, with sample sizes, means, and standard deviations given below. n = n2 = 90, x1 = 125.3, %2 = 123.8, s, = 5.7, s, = 6.9 Construct a 95% confidence interval for the difference in the population means ( M M ) (Round your answers to two decimal places.) Find a point estimate for the difference in the population means, Calculate the margin of error. (Round your answer to two decimal...
Independent random samples selected from two normal populations produced the sample means and standard deviations shown to the right. a) Assuming equal variances, conduct the test Ho: (u1-u2)=0 against Ha: (u1-u2)=/=0 using a=0.05 b) Find and interpret the 95% confidence interval for (u1-u2) Sample1: n1=17, x1=5.9, s1=3.8 Sample2: n2=10, x1=7.3, s2=4.8
In order to compare the means of two populations, independent random samples of 385 observations are selected from each population, with the results found in the table to the right. Complete parts a through e. Sample 1 Sample 2 X1 = 5,337 X2 = 5,298 s1 = 157 s2 = 191 a. use a 95% confidence interval to estimate the difference between the population means (u1 - u2). Interpret the confidence interval. b. test the null hypothesis H0: (u1 - u2)...
9.6 in order to compare the means of two populations, inde- NW pendent random samples of 400 observations are selected from each population, with the following results Sample 1 Sample 2 $.240 s2 200 5,275 1150 a. Use a 95% confidence interval to estimate the dif- ference between the population means (μ,-μ Interpret the confidence interval. b. Test the null hypothesis Ho (μι-μ)--0 versus the c. Suppose the test in part b were conducted with the d. Test thenull hypothesis...
A study takes a simple random sample from a population of full-term infants. The standard deviation of birth weights in this population is 2 pounds. Calculate 95% confidence intervals for the mean (u) for samples in which: Question 21. n=81 and x = 6.1 pounds A. (5.7 to 6.5) B. (6.3 to 7.7) C. (3.6 to 6.8) D. (4.5 to 7.1) Question 22. n= 36 and x = 7.0 pounds A. (5.7 to 6.5) B. (6.3 to 7.7) C. (3.6...
Question 5 (13 points) A random sample of 20 NAU students were asked how many hours of television they watch each week. The following is StatKey output for this data. Bootstrap Dotplot of Mean 400 Left Tail Two-TallRight Tail 350 samples - 10000 mean 5.453 std. error -0.511 Original Samp n-20, mean - 5.45 median-5, stdey - 15 10 5 300 0 250 2 4 200 150 0.025 0.950 0.025 100 Bootstrap Sam Show Data Table n-20, mean - 5.05...
5. 1 Data were collected for a random sample of 220 home sales from a U.S. community in 2003 Let Price denote the selling price (in $1000), BDR the number of bedrooms, Bath the number of bathrooms, Hsize the size of the house (in sq. ft.), Lsize the lot size (in sq. ft.), Age the age of the house (in years), and Poor a binary variable that is equal to 1 if the condition of the house is reported as...