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3 years ago

I dont know functions

Mathematics

1 answer:

Irina-Kira [14]3 years ago

5 0

Answer:

6, -8

Step-by-step explanation:

You need to find out the possible values of which X cannot equal

In fractions the only way that's possible is if the denominator= 0

Because everything in the denominator is being mulitplied this is pretty simple

We need either parantheses to equal 0

so we take them and solve for 0

we have

x-6= 0

x=6

x+8=0

x= -8

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The null hypothesis is $H_o : \sigma^2_1 = \sigma^2 _2$

The alternative hypothesis is $H_a : \sigma_1 ^2 > \sigma^2_2$

$F_{critical} = 1.8608$

$F = 2.9085$

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There is sufficient evidence to support the researchers claim

Step-by-step explanation:

From the question we are told that

The first sample size is $n_1 = 30$

The sample variance for elementary school is $s^2_1 = 8324$

The second sample size is $n_2 = 30$

The sample variance for the secondary school is $s^2_2 = 2862$

The significance level is $\alpha = 0.05$

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The alternative hypothesis is $H_a : \sigma_1 ^2 > \sigma^2_2$

Generally from the F statistics table the critical value of $\alpha = 0.05$ at first and second degree of freedom $df_1 = n_1 - 1 = 30 - 1 = 29$ and $df_2 = n_2 - 1 = 30 - 1 = 29$ is