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UNO [17]
3 years ago
11

the sum of three consecutive odd numbers equals an even integer is this sometimes, always, or never true

Mathematics
1 answer:
mel-nik [20]3 years ago
5 0
Never true.

the sum of 3 odd numbers is always odd

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Joey participated in a standardized reading test. He scored in the middle of the third stanine in a normal distribution. All of
GarryVolchara [31]

Answer:

b. His t-score is 40.

Step-by-step explanation:

The middle of the third stanine in a normal distribution means that the standard of nine that is applied has the middle of the third count.

It means that if we divide the normal distribution with the standard of nine we will find the score to be  the middle of the  third division.

So it will be (1/3*9=3) more than 3.

Which in normal distribution will be more than 30.

The t distribution is approximately normal when the number of degrees of freedom is greater than 30 .

So the best answer is that <u>His t-score is 40 </u>  ( choice b).

4 0
3 years ago
The accounting department analyzes the variance of the weekly unit costs reported by two production departments. A sample of 16
dusya [7]

Answer:

F=\frac{s^2_2}{s^2_1}=\frac{5.5}{2.5}=2.2

Now we can calculate the p value but first we need to calculate the degrees of freedom for the statistic. For the numerator we have n_2 -1 =16-1=15 and for the denominator we have n_1 -1 =16-1=15 and the F statistic have 15 degrees of freedom for the numerator and 15 for the denominator. And the P value is given by:

p_v =2*P(F_{15,15}>2.2)=0.138

For this case the p value is highert than the significance level so we haev enough evidence to FAIL to reject the null hypothesis and we can conclude that the true deviations are not significantly different

Step-by-step explanation:

Information given

n_1 = 16 represent the sampe size 1

n_2 =16 represent the sample 2

s^2_1 = 2.5 represent the sample deviation for 1

s^2_2 = 5.5 represent the sample variance for 2

\alpha=0.10 represent the significance level provided

The statistic is given by:

F=\frac{s^2_2}{s^2_1}

Hypothesis to test

We want to test if the variations in terms of the variance are equal, so the system of hypothesis are:

H0: \sigma^2_1 = \sigma^2_2

H1: \sigma^2_1 \neq \sigma^2_2

The statistic is given by:

F=\frac{s^2_2}{s^2_1}=\frac{5.5}{2.5}=2.2

Now we can calculate the p value but first we need to calculate the degrees of freedom for the statistic. For the numerator we have n_2 -1 =16-1=15 and for the denominator we have n_1 -1 =16-1=15 and the F statistic have 15 degrees of freedom for the numerator and 15 for the denominator. And the P value is given by:

p_v =2*P(F_{15,15}>2.2)=0.138

For this case the p value is highert than the significance level so we haev enough evidence to FAIL to reject the null hypothesis and we can conclude that the true deviations are not significantly different

5 0
3 years ago
Simplify 9-[3+2•3] if anyone could help me with this question
Butoxors [25]

do what is in the parenthesis first and you multiply first. 3x2 is 6. 6+3 is 9. 9-9 = 0

I think the answer is 0


3 0
3 years ago
The area of a triangle is 24 sq. inches. If the base of the triangle is 6 inches, what is its height?
il63 [147K]
Area of triangle = 0.5 base height


24 = 0.5 x 6 height 

height = 8 inches
5 0
3 years ago
Read 2 more answers
Have a nice day;) it’s ok to be tired but keep pushing. Just a lil while more
Savatey [412]

Answer:

thx

Step-by-step explanation:

6 0
2 years ago
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