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umka21 [38]
3 years ago
14

In the following drawing, find b if a = 4.5 and c = 10.8. Round your answer to two decimal places

Mathematics
1 answer:
nika2105 [10]3 years ago
6 0
9.81784090317 

I added more just in case if a teacher needs the whole answer for some reason.
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A study was designed to compare the attitudes of two groups of nursing students towards computers. Group 1 had previously taken
Leviafan [203]

Answer:

a. H0:μ1≥μ2

Ha:μ1<μ2

b. t=-3.076

c. Rejection region=[tcalculated<−1.717]

Reject H0

Step-by-step explanation:

a)

As the score for group 1 is lower than group 2,

Null hypothesis: H0:μ1≥μ2

Alternative hypothesis: H1:μ1<μ2

b) t test statistic for equal variances

t=(xbar1-xbar2)-(μ1-μ2)/sqrt[{1/n1+1/n2}*{((n1-1)s1²+(n2-1)s2²)/n1+n2-2}

t=63.3-70.2/sqrt[{1/11+1/13}*{((11-1)3.7²+(13-1)6.6²)/11+13-2}

t=-6.9/sqrt[{0.091+0.077}{136.9+522.72/22}]

t=-3.076

c. α=0.05, df=22

t(0.05,22)=-1.717

The rejection region is t calculated<t critical value

t<-1.717

We can see that the calculated value of t-statistic falls in rejection region and so we reject the null hypothesis at 5% significance level.

7 0
3 years ago
Please help. I dont understand
Gennadij [26K]

Answer: try b  

Step-by-step explanation:

glad i could help!

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2 years ago
Which statement is true about 7/10 and 2/6?
77julia77 [94]

Answer: The third answer

Step-by-step explanation:

7/10 is 0.7 and 2/6 is 0.33, 2/6 would be less than 1/2 because 1/2 is 0.5, 0.7 is greater than that benchmark

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3 years ago
Find the slope of the line. thanksss​
Sveta_85 [38]

Answer: the slope is 1

Step-by-step explanation:

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3 years ago
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Answer 17 and 18 for 15 points<br><br><br>​
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17. 62 degrees

18. 38 degrees

5 0
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