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luda_lava [24]
3 years ago
7

Your perform a chi^2 goodness-of-fit test to see if the number of birthdays occurring each month matches the expected number (as

suming each month is equally likely to be the birth month for any given individual). You get 20.5 as your chi^2 value what is the p-value for this test?
A. 0.025 < p < 0.05
B. 0.05 < p < 0.10
C. Can't determine p-value without access to the data from which this statistic was computed
D. 0.10 < p < 0.15
Mathematics
1 answer:
kirill115 [55]3 years ago
8 0
I would put b I think it’s right I’m sorry if it isn’t
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Answer:

95% confidence interval for the mean number of months is between a lower limit of 6.67 months and an upper limit of 25.73 months.

Step-by-step explanation:

Confidence interval is given as mean +/- margin of error (E)

Data: 5, 15, 12, 22, 27

mean = (5+15+12+22+27)/5 = 81/5 = 16.2 months

sd = sqrt[((5-16.2)^2 + (15-16.2)^2 + (12-16.2)^2 + (22-16.2)^2 + (27-16.2)^2) ÷ 5] = sqrt(58.96) = 7.68 months

n = 5

degree of freedom = n-1 = 5-1 = 4

confidence level (C) = 95% = 0.95

significance level = 1 - C = 1 - 0.95 = 0.05 = 5%

critical value (t) corresponding to 4 degrees of freedom and 5% significance level is 2.776

E = t×sd/√n = 2.776×7.68/√5 = 9.53 months

Lower limit of mean = mean - E = 16.2 - 9.53 = 6.67 months

Upper limit of mean = mean + E = 16.2 + 9.53 = 25.73 months

95% confidence interval is (6.67, 25.73)

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2 years ago
The perimeter of a square is represented by the expression 4(4.3 - 6). Which statement is true?O The perimeter can also be repre
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the perimeter is:

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4(4x) - 4(6)

16x - 24

Then, the perimeter can also be represented by 16x - 24 because 4(4x - 6) can be simplified to 16x - 24

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1 year ago
All of the following expressions have the same value, except . . .
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Step-by-step explanation:

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