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givi [52]
3 years ago
8

Find the critical value x2r corresponding to a sample size of 19 and a confidence level of 99% if the test is two-tailed

Mathematics
1 answer:
iragen [17]3 years ago
4 0

Answer:

For this problem we are assuming that the confidence level is 99% or 0.99, then the significance level would be \alpha=0.01 then the value of \alpha/2 =0.005 and the degrees of freddom are given by:

df =n-1 = 19-1=18

Then the critical values for this case are:

\chi^2_{\alpha/2}=6.265

\chi^2_{1-\alpha/2}=37.156

Step-by-step explanation:

For this problem we are assuming that the confidence level is 99% or 0.99, then the significance level would be \alpha=0.01 then the value of \alpha/2 =0.005 and the degrees of freddom are given by:

df =n-1 = 19-1=18

Then the critical values for this case are:

\chi^2_{\alpha/2}=6.265

\chi^2_{1- \alpha/2}=37.156

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x=−7/5and y=−6/5

Step-by-step explanation:

Step: Substitute−2x−4foryiny=3x+3:

y=3x+3

−2x−4=3x+3

−2x−4+−3x=3x+3+−3x(Add -3x to both sides)

−5x−4=3

−5x−4+4=3+4(Add 4 to both sides)

−5x=7

−5x

−5

=

7

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(Divide both sides by -5)

x=−7/5

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3 years ago
Bubbles bakery has 24 oatmeal cookies, 36 vanilla bean cookies, 42 chocolate chip cookies. What is the greatest common factor bu
STatiana [176]

Answer:6

Step-by-step explanation:

We have three groups of cookies as follows:

24   oatmeal

36   vanilla bean

42  chocolate chip

If we breack down into factors we get

24    2       24 = 2³ * 3        36    2   36 = 2²*3³         42   2   42 = 2*3*7

12     2                                 18    2                              21   3

6      2                                   9    3                                7   7

3      3                                   3    3                                1

1                                             1

Fom where we can get that biggest common factor is 6

24 ÷  6      =  4

36 ÷  6      =  6

42 ÷  6      =  7

Then Bakery will have  4 groups of oatmeal cookies, 6 of vanilla bean, and 7 chocolate chip

7 0
4 years ago
If n is an even number.<br> (b) What type of number is n + 1?
NeTakaya

Answer:

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suppose n is 2.

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5 0
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