An ancient Chinese candle clock tells the amount of time that has passed by the amount of wax that has been melted off the candl
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<u>Answer</u>: If 15% of the customer's total is $22.05, then the customer's total is <u>$147</u>.
<u>Step-by-step explanation</u>:
Let x be the customer's total amount.
It is given that 15% of the customer's total = $22.05
⇒15% of x= $22.05
Therefore, If 15% of the customer's total is $22.05, then the customer's total is <u>$147</u>.
Answer:
Step-by-step explanation:
Hello!
X₁: speed of a motorcycle at a certain intersection.
n₁= 135
X[bar]₁= 33.99 km/h
S₁= 4.02 km/h
X₂: speed of a car at a certain intersection.
n₂= 42 cars
X[bar]₂= 26.56 km/h
S₂= 2.45 km/h
Assuming
X₁~N(μ₁; σ₁²)
X₂~N(μ₂; σ₂²)
and σ₁² = σ₂²
<em>A 90% confidence interval for the difference between the mean speeds, in kilometers per hour, of motorcycles and cars at this intersection is ________.</em>
The parameter of interest is μ₁-μ₂
(X[bar]₁-X[bar]₂)± *
[(33.99-26.56) ± 1.654 *()]
[6.345; 8.514]= [6.35; 8.51]km/h
<em>Construct the 98% confidence interval for the difference μ₁-μ₂ when X[bar]₁= 475.12, S₁= 43.48, X[bar]₂= 321.34, S₂= 21.60, n₁= 12, n₂= 15</em>
[(475.12-321.34) ± 2.485 *()]
[121.96; 185.60]
I hope this helps!