Various temperature measurements are recorded at different times ...

[anjilletteb]

Various temperature measurements are recorded at different times for a particular city. The mean of 20C is obtained for 60 temperatures on 60 different days.
 
  Assuming that  = 1.5C, test the claim that the population mean is . Use a 0.05 significance level.

Question 2

Rich Borne is currently taking Chemistry 101. On the five laboratory assignments for the quarter, he got the following scores:
 
  30 38 13 48 53
  Compute the range.
  A) 53 B) 13 C) 40 D) 8

[vish98]

Answer to Question 1

:  = 23; :  > 23. Test statistic: z = -15.49;.
P-value: 0.0002. Because the P-value of 0.0002 is less than the significance level of we reject the null hypothesis.

Answer to Question 2

C

[anjilletteb]

Thank you!

[vish98]

Always glad to help...