Answer: 59.342
Step-by-step explanation:
The chi-square critical values are used to find the confidence interval for σ.
Left critical value =
[i.e. chi-square value from chi-square table corresponding to degree of freedom n-1 and significance level of
]
To find : left critical value for 95% confidence interval for σ with n = 41.
Significance level : 
degree of freedom = 41-1=40
Now, the left critical value for 95% confidence interval for σ with n = 41 is the chi-square value corresponding to degree of freedom n-1 and 
=59.342 [from chi-square table ]
Pick 100 km for D...
<span>This would yield T=100 minutes </span>
<span>Using the question stem we calculate 80 km were traveled in 1h (or 60 minutes).... </span>
<span>This leaves us with 40 minutes (2/3 of an hour) to travel 20km..... </span>
<span>R*T=D </span>
<span>R*2/3=20 </span>
<span>R=30 </span>
<span>Answer A....</span>
Im sorry i dont understand the question.. Is there another form of the question you can give me?

260 can ride the ferris wheel in 2 hours.

130 people is the rate per hour.