This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: 9.1 #8 a. Ho; =8.7 sec. b. H1; >8.7 sec. c.H1: < 8.7 sec. d. b. It would be right of the mean, because the test is for > 8.7 d. c. It would be left of the mean, because the test is for < 8.7 9.1 #10 a. a = 0.05 H0: = 85 H1: > 85 Since H1: > 85 mg/100 ml, this is a righttailed test b. Since the x distribution is normal and is known, use the standard normal distribution. z =(93.8 85) / (12.5 / 2.83) = 8.8 / 4.42 = 1.99 c. P(xb < 85) = 1  P(z > 1.99) = 1  0.9767 Pvalue = 0.0233 d. Pvalue <= alpha is false. We do not reject H0 The data is not statistically significant. e. pvalue less than the significance level we reject the null hypothesis and conclude the alternate hypothesis is true. 9.1 #14 a = 0.01 H : = 28 H 1 : 28 H 1 : 28, this is a twotailed test b. z = (32.7 28) / (4.75/ 2.65) = 4.7 / 1.79 = 2.63 c P(z > 2.63) = 2( 0.0043) Pvalue = 0.0086 d....
View
Full
Document
 Spring '08
 hill

Click to edit the document details