Exam1solbdFall01

Exam1solbdFall01 - Fall 2001 Exam 1 Solutions B No. 1 D No....

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Fall 2001 Exam 1 Solutions MSCI3710 B No. D No. Solution Version B Version D 1 6 Test whether this company can be accused of paying lower wages, compared to the industry average, the correct set of hypothesis for this test is Ho:1 μ 14.50 Ha: μ < 14.50 B A 2 5 Hourly wages in a retailing industry are normally distributed with a mean of $14.50 and a standard deviation of $2.20. Z test is used when the population standard deviation is known regardless of sample size C B 3 7 Z = X- μ 1 1 13.3 – 14.5 = -3.45 σ √ n 2.2/ 40 C D 4 9 Z* = -1.00; Zcrit = -2.326 left tail (one-tailed) test; Z* > Zcrit; therefore, we fail to reject the null hypothesis. Conclude that there is insufficient evidence B A 5 8 left tail (one-tailed) test. Alpha = 0.05, Critical value = -1.645 B A 6 10 S p 2 = (n-1) S 1 2 + (n-1) S 2 2 = 23(1.34 2 ) + 17(1.55 2 ) = 2.0536 n 1 + n 2 – 2 40 C A 7 12 Alpha = .10; critical value = t 0.05, 40 =1.684 E E 8 11 t = X 1 - X 2 = 34.3 – 35.7 = -1.4 = -2.56 S p * 1/n
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

Exam1solbdFall01 - Fall 2001 Exam 1 Solutions B No. 1 D No....

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online