State what the given confidence interval suggests about the two population means. A researcher was interested...
State what the given confidence interval suggests about the two population means. A researcher was interested in comparing the heights of women in two different countries. Independent simple random samples of 9 women from country A and 9 women from country B yielded the following heights (in inches). W1T18 The following 90% confidence interval was obtained for mu1 - mu2, the difference between the mean height of women in country A and the mean height of women in country B.-4.34 in. < mu1 - mu2 < -0.03 in What does the confidence interval suggest about the population means?
Homework Answers
The confidence interval suggest that the difference between the mean height of women in country A and the mean height of women in country B is between -4.34 and 0.03
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State what the given confidence interval suggests about the two
population means. A researcher was interested...
A researcher was interested in comparing the heights of women in two different countries.
A researcher was interested in comparing the heights of women in two different countries. Independent simple random samples of 9 women from country A and 9 women from country B yielded the following heights (in inches). Country A: 64.1 66.4 61.7 62.0 67.3 64.9 64.7 68.0 Country B: 65.3 60.2 61.7 65.8 61.0 64.6 60.0 65.4 59.0 At the 5% significance level, do the data provide sufficient evidence to conclude that the mean height of women in country A is different from the...
A researcher was interested in comparing the heights of women in two different countries
A researcher was interested in comparing the heights of women in two different countries. Independent simple random samples of 9 women from country A and 9 women from country B yielded the following heights (in inches). Country A: 64.1 66.4 61.7 62.0 67.3 64.9 64.7 68.0 63.6 Country B: 65.3 60.2 61.7 65.8 61.0 64.6 60.0 65.4 59.0 At the 5% significance level, do the data provide sufficient evidence to conclude that the mean height of women in country A is different from...
A researcher was interested in comparing the amount of time spent watching television by women and...
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 following 99% confidence interval was obtained for µ1 - µ2 the difference between the mean amount of time spent watching television for women and the mean amount of time spent watching...
Question 17 4 pts A researcher was interested in comparing the amount of time spent watching...
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...
A researcher was interested in comparing the heights of ninjas in two independent villages
A researcher was interested in comparing the heights of ninjas in two independent villages. A random sample of 9 ninjas from the Hidden Leaf Village has an average height of 64.744 inches, with a standard deviation of 2.192 inches. A random sample of 9 ninjas from the Hidden Sand Village has an average height of 62.556 inches, with a standard deviation of 2.697 inches. Determine a 90% confidence interval for the difference between the mean height of ninjas in the...
Question 16 4 pts Test the indicated daim about the means of two populations. Assume that...
Question 16 4 pts Test the indicated daim about the means of two populations. Assume that the two samples are independent simple random samples selected from normally distributed populations Two types of flares are tested and their burning times in minutes are recorded. The summary statistics are given below. Use any method to determine if there is a significant difference in the burning times of the flares using a significance level of 0.05. Beady Brand X n-1 40 1-0 min...
uestion 4 Calculate the 95% confidence interval for the difference (mul-mu2) of two population means given...
uestion 4 Calculate the 95% confidence interval for the difference (mul-mu2) of two population means given the following sampling results. Population 1: sample size = 19, sample mean = 22.82, sample standard deviation = 4.81. Population 2: sample size = 5, sample mean = 12.06, sample standard deviation = 3.75 Your answer: 9.60 < mul-mu2 < 11.93 . 6.02 < mul-muz < 15.51 6.44 < mul-mu2 <15.08 6.37 < mul-mu2 < 15.16 1.82 < mul-mu2 < 19.71 9.58 < mul-mu2...
Calculate the 95% confidence interval for the difference (mul-mu2) of two population means given the following...
Calculate the 95% confidence interval for the difference (mul-mu2) of two population means given the following sampling results. Population 1: sample size = 15, sample mean = 30.95, sample standard deviation = 4.07. Population 2: sample size = 11, sample mean = 14.38, sample standard deviation = 4.07. Your answer: O 13.79 < mul-mu2 < 19.36 13.97 < mul-mu2 < 19.18 O 12.83 < mul-mu2 <20.32 11.14 <mul-mu2 < 22.01 O 16.31 <mul-mu2 < 16.84 O 11.33 < mul-mu2<21.82 o...
Large samples of women and men are obtained and the hemoglobin level is measured in each subject. Here is the 95% confidence interval or the difference between the two population means, where the mea...
Large samples of women and men are obtained and the hemoglobin level is measured in each subject. Here is the 95% confidence interval or the difference between the two population means, where the measures from women correspond to population 1 and the measures from men correspond to population 2 -1.76 g / dL·1 <-1.62 g /dL. Complete parts (a) through (c) below. a. What does the confidence interval suggest about equality of the mean hemoglobin level in women and the...
Construct the indicated confidence interval for the difference between the two population means. Assume that the...
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 (12) so that the standard error of the difference between means is obtained by pooling the sample variances. A researcher regularly and people who do not exercise regularly, Independent simple random samples were obtained of 16 people who do not exercise regularly and...
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...
Question 16 4 pts Test the indicated daim about the means of two populations. Assume that the two samples are independent simple random samples selected from normally distributed populations Two types of flares are tested and their burning times in minutes are recorded. The summary statistics are given below. Use any method to determine if there is a significant difference in the burning times of the flares using a significance level of 0.05. Beady Brand X n-1 40 1-0 min...
uestion 4 Calculate the 95% confidence interval for the difference (mul-mu2) of two population means given the following sampling results. Population 1: sample size = 19, sample mean = 22.82, sample standard deviation = 4.81. Population 2: sample size = 5, sample mean = 12.06, sample standard deviation = 3.75 Your answer: 9.60 < mul-mu2 < 11.93 . 6.02 < mul-muz < 15.51 6.44 < mul-mu2 <15.08 6.37 < mul-mu2 < 15.16 1.82 < mul-mu2 < 19.71 9.58 < mul-mu2...
Calculate the 95% confidence interval for the difference (mul-mu2) of two population means given the following sampling results. Population 1: sample size = 15, sample mean = 30.95, sample standard deviation = 4.07. Population 2: sample size = 11, sample mean = 14.38, sample standard deviation = 4.07. Your answer: O 13.79 < mul-mu2 < 19.36 13.97 < mul-mu2 < 19.18 O 12.83 < mul-mu2 <20.32 11.14 <mul-mu2 < 22.01 O 16.31 <mul-mu2 < 16.84 O 11.33 < mul-mu2<21.82 o...
Large samples of women and men are obtained and the hemoglobin level is measured in each subject. Here is the 95% confidence interval or the difference between the two population means, where the measures from women correspond to population 1 and the measures from men correspond to population 2 -1.76 g / dL·1 <-1.62 g /dL. Complete parts (a) through (c) below. a. What does the confidence interval suggest about equality of the mean hemoglobin level in women and the...
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 (12) so that the standard error of the difference between means is obtained by pooling the sample variances. A researcher regularly and people who do not exercise regularly, Independent simple random samples were obtained of 16 people who do not exercise regularly and...
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