The percentage of titanium in an alloy used in aerospace castings is measured in 51 randomly selected parts. the sample standard deviation is s = 0.36. construct a 95% two-sided confidence interval for σ. assume population is approximately normally distributed. round your answers to 4 decimal places.

Step-by-step explanation:

The confidence interval for population standard deviation is given by :-

Given : Significance level :

Sample size : n= 51

Sample standard deviation : s=0.36

Then by using the chi-square distribution table, we have

Confidence interval for population standard deviation will be :-

answer: given that the roller coaster can accommodate 1600 riders per hour, thus the roller coaster can accomodate 1600 / 60 = 26.67 riders per minute.

given that there are 345 people in the line, the number of minutes it will take for the 345 persons to get into the roller coaster is given by 345 / 26.67 = 12.94 minutes.

therefore, it will take you 12.94 minutes to get to the front of the line.

step-by-step explanation:

2 and 1.

step-by-step explanation:

plug in each answer. 0 doesn't work, 1 does. so does 2. 4 doesn't:

0 = 1 is not true.

2 = 2 is true.

4 = 4 is true.

8 = 16 is not true.

hope this !