Give a 98% confidence interval, for μ1−μ2 given the following information. n1=35, ¯x1=2.57, s1=0.96 n2=45, ¯x2=2.36, s2=0.45
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Give a 98% confidence interval, for μ1−μ2 given the following information.
n1=35, ¯x1=2.57, s1=0.96
n2=45, ¯x2=2.36, s2=0.45
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- Give a 99% confidence interval, for μ1−μ2 given the following information. n1=45, ¯x1=2.76, s1=0.73n2=35, ¯x2=2.53, s2=0.62 Rounded to 2 decimal places.Give a 95% confidence interval, for μ1−μ2 given the following information. n1=25, ¯x1=2.54, s1=0.89n2=45, ¯x2=2.34, s2=0.99Give a 90% confidence interval, for μ1−μ2 given the following information. n1=35 ¯x1=2.45, s1=0.71n2=45, ¯x2=2.14, s2=0.97 ± Use Technology Rounded to 2 decimal places.
- Give a 98% confidence interval, for μ1−μ2 given the following information. n1=45 xbar1=2.62, s1=0.8n2=60n xbar = 3.02, s2=0.67 ____ ±± ____ Use Technology Rounded to 2 decimal places.Give a 95% confidence interval, for μ1−μ2 given the following information. n1=25, ¯x1=2.37, s1=0.9n2=45, ¯x2=2.52 s2=0.75 ±± Use Technology Rounded to 2 decimal places.Unfortunately, arsenic occurs naturally in some ground water.t A mean arsenic level of u = 8.0 parts per billion (ppb) is considered safe for agricultural use. A well in Texas is used to water cotton crops. This well is tested on a regular basis for arsenic. A random sample of 36 tests gave a sample mean of x = 6.7 ppb arsenic, with s = 3.0 ppb. Does this information indicate that the mean level of arsenic in this well is less than 8 ppb? Use a = 0.01. n USE SALT (a) What is the level of significance? State the null and alternate hypotheses. O Ho: H = 8 ppb; H,: u > 8 ppb O Ho: H = 8 ppb; H,: H + 8 ppb O Ho: H 8 ppb; H,: u = 8 ppb O Ho: H = 8 ppb; H,: µ 0.100 O 0.050 < P-value < 0.100 O 0.010 < P-value < 0.050 O 0.005 < P-value < 0.010 P-value < 0.005 Sketch the sampling distribution and show the area corresponding to the P-value. MacBook Pro esc
- n=10 b = 0.50 sb = 0.02 α=0.05 find the confidence interval for β.Unfortunately, arsenic occurs naturally in some ground water.t A mean arsenic level of u = 8.0 parts per billion (ppb) is considered safe for agricultural use. A well in Texas is used to water cotton crops. This well is tested on a regular basis for arsenic. A random sample of 36 tests gave a sample mean of x = 7.1 ppb arsenic, with s = 2.2 ppb. Does this information indicate that the mean level of arsenic in this well is less than 8 ppb? Use a = 0.01. A USE SALT (a) What is the level of significance? State the null and alternate hypotheses. O Họ: u = 8 ppb; H,: u > 8 ppb O Ho: H 8 ppb; H,: u = 8 ppb (b) What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. The standard normal, since the sample size is large and a is unknown. O The Student's t, since the sample size is large and a is known. O The standard normal, since the sample size is large and a is known. The Student's t, since the sample size is large and a is unknown. What is the…Unfortunately, arsenic occurs naturally in some ground water.t A mean arsenic level of u = 8.0 parts per billion (ppb) is considered safe for agricultural use. A well in Texas is used to water cotton crops. This well is tested on a regular basis for arsenic. A random sample of 36 tests gave a sample mean of x = 7.1 ppb arsenic, with s = 2.2 ppb. Does this information indicate that the mean level of arsenic in this well is less than 8 ppb? Use a = 0.01. A USE SALT (a) What is the level of significance? State the null and alternate hypotheses. O Ho: H= 8 ppb; H,: H > 8 ppb O Ho: H 8 ppb; H: H = 8 ppb (b) What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. O The standard normal, since the sample size is large and a is unknown. O The Student's t, since the sample size is large and a is known. O The standard normal, since the sample size is large and a is known. O The Student's t, since the sample size is large and a is unknown. What is…
- Give a 90% confidence interval, for μ1−μ2μ1-μ2 given the following information. n1=20, x¯1=2.95, s1=0.7n2=30, ¯x2=2.76 , s2=0.75 __±___ Use Technology Rounded to 2 decimal places.Give a 99.5% confidence interval, for μ1−μ2μ1-μ2 given the following information.n1=20, ¯x1=2.52, s1=0.94n2=55, ¯x2=2.51, s2=0.52Rounded both solutions to 2 decimal places.