Frito-lay fills bags of tortilla chips that are labeled with a net weight of 288.5 grams. a random sample of 24 bags is selected and found to have an average net weight of 289.7 grams and a sample standard deviation of 5.6 grams. use a 95% confidence interval to investigate whether the filling process is working properly.

It will reject the null hypothesis.

Step-by-step explanation:

Since we have given that

Hypothesis:

n = 24

Average mean = 289.7 grams

Standard deviation = 5.6 grams

We need to find the 95% confidence interval.

Since n = 24 <30 , so we will use t test.

Now, degrees of freedom = n- 1 = 24-1 =23

So,

Since t(calculated)>t

1.05>0.685

So, it will reject the null hypothesis.

7

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional