Answer:
Step-by-step explanation:
Mean "X"=250
s = 25
n=10
Because Standard deviation is unknown and sample size is small, we must employ the T-distribution
df=n-1 = 10-1
df=9
For 90% confidence, t = 1.833
E=t*s/
= 1.833*(25/
)
E=14.49
The 90% confidence interval is X±E=250±14.49 or 235.51, 264.49
Answer:
1021
Step-by-step explanation:
delta math said it was right
Answer:
So that means length of the bike is approx 5.7 rulers.
Step-by-step explanation:
the question says to estimate how many 12-inch rulers will be about the same length as a bike. In other words we have to measure the length of bike by in terms of ruler like 3 ruler length or 5 rular length etc.
Type of bike is not mentioned so i'm going to use bicyle.
From internet I found that approx lenght of a bike ( bicycle) is = 68 inches.
Given that 1 ruler = 12 inches
So number of rulers that can fit into 68 inches can be found by dividing 68 by 12
68/12 = 5.7
So far she scored 11 out of 15, which is a chance of 11/15, which is also the experimental probability for her next throw.
