Sarah has some grapes. She gathers 3 more grapes. She now has 40 grapes.

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

2 years ago

I need to know what 9+10 is

Dvinal [7]

Answer:

There is a few ways to answer this:

The actual and simple way: 19

The way we use for fun, (meme way): 910

7 0

2 years ago

Read 2 more answers

Biologists have found that the number of chirps some types of cricket make per minute depends upon the temperature this relation

Alex Ar [27]

Answer: Crickets make 172 chirps/min at 80 degrees Fahrenheit

Step-by-step explanation:

Step 1

Using the point slope formulae for Linear functions , we have that

y - y1 = m(x - x1)

where x and y are two points representing the temperature and chirps /min respectively

And

m= slope

Step 2 : Finding the slope , m

where x1=60

y1=92

x2= 75

y2=152

m= (y2-y1)/ (x2-x1)

= (152- 92)/(75-60)

=60/15 =4

Bringing down the point/slope formula and imputing the known values to find our equation to show the relationship cricket make per minute and the temperature

y - y1 = m(x - x1)

y - 92= 4(x - 60)

y - 92 = 4x -240

y = 4x - 240 + 92

y = 4x - 148

Step 3

To find the number of chirps be per minute (y) if the temperature is 80 degrees Fahrenheit( x)

y = 4(80) - 160

y = 320 - 148

y = 172 chirps/min at 80 degrees Fahrenheit

6 0

2 years ago

Misty bought 3 CDs. The country music CD cost $12. The rock music CD cost 2/3 as much as the country music CD. The platinum edit

kaheart [24]

Country music : $ 12
rock music : 2/3 * 12 = 24/3 = $ 8
platinum : 2 * 8 = $ 16

the total cost is : (12 + 8 + 16) = $ 36

the hidden question ??

6 0

2 years ago

Sofia measures the length of her car as 16 feet. What is the greatest possible error? ______ feet What is the margin of error? _

Genrish500 [490]

Answer:

Sofia measures the length of her car as 16 feet.

What is the greatest possible error?

What is the margin of error?

Step-by-step explanation:

3 0

2 years ago