what is the correct answer? A paint manufacturer made a modification to a paint to speed...
A paint manufacturer which is to compare the drying times of two types of paint. Independent samples random samples of 11 cans of Type A and nine cans of Type B selected and applied similar services. The drying times, and hours, recorded. The summary statistics are as follows: Type A. Type B x1=77.5 hours. x2=63.6 hours s1=4.5 hours. s2=5.1 hours n1=11. n2=9. Construct a 98% confidence interval the difference in mean drying times for type a and type B a.)...
Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent simple random samples selected from normally! distributed populations. Also assume that the population standard deviations are equal (0, 0), so that the standard error of the difference between means is obtained by pooling the sample variances. A paint manufacturer wanted to compare the drying times of two different types of paint. Independent simple random samples of 11 cans of type...
Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. A paint manufacturer wished to compare the drying times of two different types of paint. Independent simple random samples of 11 cans of type A and 9 cans of type B were selected and applied to similar surfaces. The drying times, in...
A paint manufacturer uses a machine toll gallon cars with paint (1 128 ounces). The manufacturer wants to estimate the mean volume of paint the machine is puting in the card within 0.5 ounce Assume the population of volumes is normally distribuid. (8) Determine the minimum sample size required to constructa 90% confidence interval for the population mean. Assume the population standard deviation is 0.71 ounce (0) The sample meanis 126.75 ounces with a sample size of 9, a 90%...
on u c ve " c ed con de w r er val u' dir rence bel e he wo po uation means ssum h he wo sam es are l dependent s ' 'ple andum samp es se ecled 'om norrna dis ribuled popula on so as ur旧 hal he popula on nda d deviations are cal (120 hat the standard error of the difference between mcans is oblained by pooling the sample variances A paint manufacturer wanted to...
Having the worst time trying to answer these three questions below. Assume that σ21=σ22=σ2. Calculate the pooled estimator of σ2 when the first sample gives s21=128 and the second independent sample gives s22= 128, and n1=n2=36. Give your answer to two decimal places , do not round up or down. And .. Two independent random samples have been slected ; 111 observations from population one and 143 observations from population two. From previous experience it is known that the standard...
Timed Test Thistest has a time of 2 hours and 30 minutes. This test will save and submit automatically when the time expres. Warnings appear when half the time 5 minutes 1 minute and seconds reman Multiple Anemos Not allowed. This can only be taken once Force Completion Once started this test must be completed in one Do not be the before Save and Suit Your answers are saved automatically Remaining Time: 2 hours, 25 minutes 52 seconds Question Completion...
Question 17 4 pts A researcher was interested in comparing the amount of time spent watching television by women and by men. Independent simple random samples of 14 women and 17 men were selected, and each person was asked how many hours he or she had watched television during the previous week. The summary statistics are shown in the chart below. The following 99% confidence interval was obtained for the difference between the mean amount of time spent watching television...
Consider the following data drawn independently from normally distributed populations: (You may find it useful to reference the appropriate table: z table or t table) x−1x−1 = 27.7 x−2x−2 = 30.1 σ12 = 92.8 σ22 = 87.5 n1 = 24 n2 = 33 a. Construct the 99% confidence interval for the difference between the population means. (Negative values should be indicated by a minus sign. Round all intermediate calculations to at least 4 decimal places and final answers to 2...
plz answer asap Afflicted Healthy A study was done to see if psychiatric conditions had biological symptoms. The brain volumes of afflicted and healthy patients were measured. Construct a 99% confidence interval for the difference between the population means. Do not assume the population standard deviations are equal What do the results suggest about the difference between the population means? Does it appear that psychiatric conditions have a biological basis? Click the icon to view the table of critical values...