Consider the following results for two independent random samples taken from two populations. Sample 2 n2-30...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample 2 n1 = 40 n2 = 30 x1 = 13.3 x2 = 11.4 σ1 = 2.2 σ2 = 3.5 a. state the null and alternative hypothesis b. which test should we use for this problem c. what is the test statistic d. what is the critical value e. what is the p-value
Consider the following results for two independent random samples taken from two Sample 1 Sample 2 n1-40n2 30 x1 -13.3 x2 11.4 01-2.2 ơ2-3.5 a state the null and alternative hypothesis b. which test should we use for this problem c. what is the test statistic d. what is the critical value e. what is the p-value
(Exercise 11.1(Algorithmic)) Consider the following results for independent samples taken from two populations Sample 1 1 400 P1 0.45 Sample 2 300 p2 0.34 a. What id the point estimate of the difference between the two population proportions (to 2 decimals)i b Develop a 90% confidence interval for the difference between the two population proportions to 4 decimals to C. Develop a 95% confidence interval for the difference between the two population proportions (to 4 decimals). to Consider the hypothesis...
Consider the following results for independent random samples taken from two populations. Sample 1 Sample 2 n1= 20 n2 = 40 x1= 22.1 x2= 20.6 s1= 2.9 s2 = 4.3 a. What is the point estimate of the difference between the two population means (to 1 decimal)? b. What is the degrees of freedom for the t distribution (round down)? c. At 95% confidence, what is the margin of error (to 1 decimal)? d. What is the 95% confidence interval...
The following results are for independent random samples taken from two populations. Sample 1 Sample 2 n1 = 20 n2 = 30 x1 = 22.9 x2 = 20.1 s1 = 2.6 s2 = 4.8 (c) At 95% confidence, what is the margin of error? (Round your answer to one decimal place.) ? (d) What is the 95% confidence interval for the difference between the two population means? (Use x1 − x2. Round your answers to one decimal place.) ? to...
Consider the following hypothesis test. The following results are for two independent samples taken from the two populations. Sample 2 n2=70 X 2 106 7.6 Sample 1 1-104 7 1 -8.4 a. What is the value of the test statistic? If required enter negative values as negative numbers (to 2 decimals). b. What is the p-value (to 4 decimals)? Use z-table. C. With α-.05, what is your hypothesis testing conclusion? Select Icon Key
Exercise 10.9(Algorithmic)) Consider the following results for independent random samples taken from two populations Sample 1 Sample 2 n1 10 n2 30 x1- 22.8 x2 20.9 $1-2.9 s2 4.8 a. What is the point estimate of the difference between the two population means (to 1 decimal)? b. What is the degrees of freedom for the t distribution (round down)? C. At 95% confidence, what is the margin of error (to 1 decimal)? d. what is the 95% confidence interval for...
Consider the following summary statistics, calculated from two independent random samples taken from normally distributed populations. Sample 1 Sample 2 x¯1=20.92 x¯2=26.80 s21=2.89 s22=3.81 n1=19 n2=15 Test the null hypothesis H0:μ1=μ2against the alternative hypothesis HA:μ1<μ2. a) Calculate the test statistic for the Welch Approximate t procedure. Round your response to at least 3 decimal places. b) The Welch-Satterthwaite approximation to the degrees of freedom is given by df = 27.983055. Using this information, determine the range in which the p-value...
Consider the following summary statistics, calculated from two independent random samples taken from normally distributed populations. Sample 1 Sample 2 x¯1=20.08 x¯2=24.51 s21=2.05 s22=3.20 n1=19 n2=16 Test the null hypothesis H0:μ1=μ2against the alternative hypothesis HA:μ1<μ2. a) Calculate the test statistic for the Welch Approximate t procedure. Round your response to at least 3 decimal places. b) The Welch-Satterthwaite approximation to the degrees of freedom is given by df = 28.610808. Using this information, determine the range in which the p-value...
Consider the following results for independent samples taken from two populations. Sample 1 Sample 2 ni = 400 n2= 300 P1= 0.44 P2= 0.36 a. What is the point estimate of the difference between the two population proportions (to 2 decimals)? b. Develop a 90% confidence interval for the difference between the two population proportions (to 4 decimals). Use z-table. to c. Develop a 95% confidence interval for the difference between the two population proportions (to 4 decimals). Use z-table....