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AlladinOne [14]
3 years ago
15

HELPPPPPPP!!!!! ASAPPPPPP!!!!

Mathematics
2 answers:
yarga [219]3 years ago
7 0

Step-by-step explanation:

"...to cover more than 8 miles"

Since the question said strictly greater,

We need to use the correct inequality sign:

  • >= means Greater or Equal
  • <= means Lesser or Equal
  • = means Equal only
  • > means Greater only

Hence > is the correct sign to use.

Xelga [282]3 years ago
4 0

Answer: I think your answer would be B

i hope it's right

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balu736 [363]

Answer:

Step-by-step explanation:

number of samples, n = 10

Mean = (48 + 51 + 46 + 52 + 47 + 48 + 47 + 50 + 51 + 59)/10 = 49.9

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Summation(x - mean) = (48 - 49.9)^2 + (51 - 49.9)^2 + (46 - 49.9)^2+ (52 - 49.9)^2 + (47 - 49.9)^2 + (48 - 49.9)^2 + (47 - 49.9)^2 + (50 - 49.9)^2 + (51 - 49.9)^2 + (59- 49.9)^2 = 128.9

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Confidence interval is written in the form,

(Sample mean - margin of error, sample mean + margin of error)

The sample mean, x is the point estimate for the population mean.

Margin of error = z × s/√n

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s = sample standard deviation

From the information given, the population standard deviation is unknown and the sample size is small, hence, we would use the t distribution to find the z score

In order to use the t distribution, we would determine the degree of freedom, df for the sample.

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Since confidence level = 95% = 0.95, α = 1 - CL = 1 – 0.95 = 0.05

α/2 = 0.05/2 = 0.025

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z = 2.262

Margin of error = 2.262 × 3.59/√10

= 2.57

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the lower limit of this confidence interval is

49.9 + 2.57 = 52.47

So it is false

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