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Deffense [45]
3 years ago
9

If it is 12:00 noon,then the sun is shining

Mathematics
1 answer:
LUCKY_DIMON [66]3 years ago
6 0
Yes it is it's been that way for years
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Suppose that each observation in a random sample of 100 fatal bicycle accidents in 2015 was classified according to the day of t
liraira [26]

Answer:

The calculated χ² =  0.57   does not fall in the critical region χ² ≥  12.59  so we fail to reject the null hypothesis and conclude the proportion of fatal bicycle accidents in 2015 was the same for all days of the week.

Step-by-step explanation:

1) We set up our null and alternative hypothesis as

H0:  proportion of fatal bicycle accidents in 2015 was the same for all days of the week

against the claim

Ha:  proportion of fatal bicycle accidents in 2015 was not the same for all days of the week

2) the significance level alpha is set at 0.05

3) the test statistic under H0 is

χ²= ∑ (ni - npi)²/ npi

which has an approximate chi square distribution with ( n-1)=7-1=  6 d.f

4) The critical region is χ² ≥ χ² (0.05)6 = 12.59

5) Calculations:

χ²= ∑ (16- 14.28)²/14.28 + (12- 14.28)²/14.28 + (12- 14.28)²/14.28 + (13- 14.28)²/14.28 + (14- 14.28)²/14.28 + (15- 14.28)²/14.28 + (18- 14.28)²/14.28

χ²= 1/14.28 [ 2.938+ 5.1984 +5.1984+1.6384+0.0784 +1.6384+13.84]

χ²= 1/14.28[8.1364]

χ²= 0.569= 0.57

6) Conclusion:

The calculated χ² =  0.57   does not fall in the critical region χ² ≥  12.59  so we fail to reject the null hypothesis and conclude the proportion of fatal bicycle accidents in 2015 was the same for all days of the week.

b.<u> It is r</u>easonable to conclude that the proportion of fatal bicycle accidents in 2015 was the same for all days of the week

6 0
3 years ago
Find the area of the shaded region
Studentka2010 [4]

Answer:

28 squared units

Step-by-step explanation:

6x6=36. 2x2=4. 4x2=8. 36-8=28.

4 0
2 years ago
The following list shows the items and prices for a restaurant order. Calculate the total amount if there is 7.5% tax and the cu
sineoko [7]
<span>= $57.93 0r $58 - $0.07
$57.93 + .075($57.93) +.15($57.93) = 1.225($57.93) = $70.96

Which is A($70.96</span>
4 0
3 years ago
Read 2 more answers
How long is the number Pi?
Harrizon [31]

Answer:

Its an infinite amount of numbers

Step-by-step explanation:

Pi is a number that continues and never stops, which is also known as an infinite number.

4 0
3 years ago
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The fabric for Isabella’s new dress is sold by the yard. The pattern for the dress requires 8 feet of fabric. How many yards of
trapecia [35]

Answer:

2 2/3 yd

Step-by-step explanation:

Let's convert from feet to yards. See how the feet cancel, because feet is in the denominator and the numerator?

8 ft x 1 yd/3 ft = 8/3 yd

As a mixed number:

8/3 = <u>2 2/3 yd of fabric</u>

3 0
3 years ago
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