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il63 [147K]
3 years ago
15

Are these true or false plz help

Mathematics
2 answers:
vredina [299]3 years ago
8 0

Answer:

v

Step-by-step explanation:

storchak [24]3 years ago
8 0

Answer:

true

Step-by-step explanation:

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As a​ follow-up to a report on gas​ consumption, a consumer group conducted a study of SUV owners to estimate the mean mileage f
kondor19780726 [428]

Answer:

The 95​% confidence interval estimate for the mean highway mileage for SUVs is (18.29mpg, 20.91mpg).

Step-by-step explanation:

Our sample size is 96.

The first step to solve this problem is finding our degrees of freedom, that is, the sample size subtracted by 1. So

df = 96-1 = 95

Then, we need to subtract one by the confidence level \alpha and divide by 2. So:

\frac{1-0.95}{2} = \frac{0.05}{2} = 0.025

Now, we need our answers from both steps above to find a value T in the t-distribution table. So, with 95 and 0.025 in the t-distribution table, we have T = 1.9855.

Now, we find the standard deviation of the sample. This is the division of the standard deviation by the square root of the sample size. So

s = \frac{5.6}{\sqrt{96}} = 0.57

Now, we multiply T and s

M = T*s = 1.9855*0.57 = 1.31

For the lower end of the interval, we subtract the mean by M. So 19.6 - 1.31 = 18.29

For the upper end of the interval, we add the mean to M. So 19.6 + 1.31 = 20.91

The 95​% confidence interval estimate for the mean highway mileage for SUVs is (18.29mpg, 20.91mpg).

8 0
3 years ago
Someone help with this please!!!!
damaskus [11]

Answer:

10^{4} * 10^{3}=(10*10*10*10)(10*10*10) = 10^{7}\\\\10^{4}*10^{4}=(10*10*10*10)(10*10*10*10) = 10^8\\\\(10*10*10)(10*10*10*10*10)=10^3*10^5=10^8\\

10^{18}*10^{23}= (10 x 10 18 times)(10 x 10 23 times) =10^{41}

just as a note: when you multiply numbers with exponents and they both have the same base, all you have to do is add the exponents.

Ex: 10^{5}*10^{4}=10^{5+4}=10^{9}

6 0
3 years ago
HELP WITH THIS EZ QUESTION
9966 [12]

Answer:

89

Step-by-step explanation:

3+75t-16t^{2} =h\\\\

we evaluate when t=2

3+75(2)-16(2)^2=h\\\\3+150-64=h\\\\h=89

so it's 89 feet

7 0
3 years ago
Read 2 more answers
Anyone know this one?
vodomira [7]

Answer:

yes

Step-by-step explanation:

draw 4 colors red..............your trun.............

5 0
3 years ago
Could someone help me? ASAP!!
Wewaii [24]

Answer:

y=2x+3

Slope intercept form

8 0
3 years ago
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