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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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natta225 [31]

Answer:

The probability is 0.0015

Step-by-step explanation:

We know that the mean \mu is:

\mu=6:30\ p.m

The standard deviation \sigma is:

\sigma=0:15\ minutes

The Z-score is:

Z=\frac{x-\mu}{\sigma}

We seek to find

P(x>7:15\ p.m.)

The Z-score is:

Z=\frac{x-\mu}{\sigma}

Z=\frac{7:15-6:30}{0:15}

Z=\frac{0:45}{0:15}

Z=3

The score of Z = 3 means that 7:15 p.m. is 3 standard deviations from the mean. Then by the rule of the 8 parts of the normal curve, the area that satisfies the conficion of 3 deviations from the mean has percentage of 0.15%

So

P(x>7:15\ p.m.)=P(Z>3)=0.0015

3 0
3 years ago
Anna's scores for a video game are 670, 575, 400, 575, 1250, 720, and 885. Which statement about the data is correct? A) The med
Dmitrij [34]
400+575+575+670+720+885+1250=5075
5075/7=725

Mean = 725

400, 575, 575, 670, 720, 885, 1250
Median = 670

725>670
C) The Mean is greater than the Median
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3 years ago
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Ella finished a bike race in 37.6 minutes. Miranda finished the race 9 1/10 minutes sooner than Ella finished it. How many minut
Blababa [14]

Answer:

56.7

Step-by-step explanation:

Just Add all numbers

8 0
3 years ago
Yumi and Juan pick up litter along the highway at the same rate. Yumi picks up litter for 3 miles and takes two hours longer tha
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3/(x+2) = 2/x

multiply both fractions by x(x+2) to cancel out the bottoms

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ow subtract 2X from both sides and you get

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7 0
3 years ago
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A homeowner wants several small dormers built on his roof to admit light. They will be in the shape of isosceles triangles whose
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P = s + (s + 5) + (s + 5) This represents the two sides that are 5 inches longer than the base (s + 5) and the base (s).
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3 years ago
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