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hoa [83]
3 years ago
13

A sample of 64 was taken from a population, with the mean of the sample being 43 and the standard deviation of the sample being

6. What is the 95% confidence interval for the mean of the population?
A. (42.25, 43.75)
B. (37.3, 48.7)
C. (41.5, 44.5)
D. (37, 49)
Mathematics
1 answer:
zzz [600]3 years ago
5 0

Answer:

C. (41.5, 44.5)

Step-by-step explanation:

Point estimate of population variance:

64(6²)/63

256/7

xbar +/- [z × sqrt(var/n)]

43 +/- [1.96 × sqrt(256/7 ÷ 64l]

43 +/- 1.481620735

[41.51837927 , 44.48162073]

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Step-by-step explanation:

6 0
2 years ago
Y+23=59<br><br>solve for y i dont know if i have to add or subtract the 23 and 59
neonofarm [45]
When you move a number to the opposite side of the equation, in this occasion it will be 23- it changes to the opposite value. So us 23 is a positive value you can move it and change it to a negative. Or in other words suntract -23 from all sides of the equation, which will be equal to: 
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7 0
3 years ago
The probability that Jessica will strike oil is 18%. If she drills 14 wells, find the probability that she will make exactly 4 s
barxatty [35]

Answer:

19 678932

Step-by-step explanation:

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7 0
2 years ago
In a recent​ study, volunteers who had 8 hours of sleep were three times more likely to answer questions correctly on a math tes
Shalnov [3]

Answer:

Step-by-step explanation:

Sleep Deprivation

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(a) Identify the sample used in the study.

(b) What is the sample's population?

(c) Which part of the study represents the descriptive branch of statitics?

(d) Make an inference based on the results of the study?

Solution

A. The samples used is the hours of sleep and math test scores of the volunteers

B. The samples population is hours of sleep and math test scores of people in general

C. The part of the study that represent the descriptive branch of statistics is "three times more likely"

D.Inference: To perform well in a math test, a person should get at least 8 hours of sleep the night before.

3 0
3 years ago
What is the solution of the following system of linear equations?<br> y = x - 7<br> 2y + x=1
andrew-mc [135]

Answer:

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Step-by-step explanation:

I just took this!

Hope I helped

5 0
2 years ago
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