No fast food 2310 2295 2280 2340 2235 2265 2315 2291.429 34.8466
food Fast 2579 2160 2165 2580 2558 2591 2614 2518 2583.125 33.0646
Give a 95% confidence interval for the difference of the two means, (Uf - Un), where is the mean calorie intake for teens who typically eat fast food and is that for teens who do not typically eat fast food assuming two normal populations, independent random samples, and equal variances for the two populations
Answer:
Step-by-step explanation:
For "no fast food,
n1 = 9
Mean = (2310 + 2295 + 2280 + 2340 + 2235 + 2265 + 2315 + 2291.429 + 34.8466)/9
Mean, m1 = 2041
Standard deviation, s1 = √summation(x - u)²/n
summation(x - u)² =
(2310 - 2041)^2 + (2295 - 2041)^2 + (2280 - 2041)^2 + (2340 - 2041)^2 + (2235 - 2041)^2 + (2265 - 2041)^2 + (2315 - 2041)^2 + (2291.429 - 2041)^2 + (34.8466 - 2041)^2
= 4533653.14837256
s = √4533653.14837256/9
s = 709.75
For " fast food",
n2 = 10
Mean = (2579 + 2160 + 2165 + 2580 + 2558 + 2591 + 2614 + 2518 2583.125 + 33.0646)/10
Mean,m2 = 2238
summation(x - u)² =
(2579 - 2238)^2 + (2160 - 2238)^2 + (2165 - 2238)^2 + (2580 - 2238)^2 + (2558 - 2238)^2 + (2591 - 2238)^2 + (2614 - 2238)^2 + (2518 - 2238)^2 + (2583.125 - 2238)^2 + (33.0646 - 2238)^2
= 5672294.38379816
s2 = √5672294.38379816/10
s2 = 753.15
For a confidence interval of 95%, z = 1.96
The formula for confidence interval is
m1 - m2 ± z × √(s1²/n1 + s2²/n2)
= 2041 - 2238 ± 1.96 × √(709.75²/9 + 753.15²/10)
= - 197 ± 1.96 × √(55971.6736 + 56723.4923)
= - 197 ± 1.96 × 335.7
= - 197 ± 657.972
The lower end of the interval is
- 197 - 657.972 = - 854.972
The upper end of the interval is
- 197 + 657.972 = 460.972
Answer:
(0,0) and (1,4)
Step-by-step explanation:
you want to have the same slope as
y=4,which is 4.
so(4-0)/(1-0)=4/1=4
The others do not have the same slope.
Answer:
10 point separation.
Step-by-step explanation:
There are 14 points for gold and 4 points for fifth place.
Hope this helps!
Answer:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Step-by-step explanation:
26.67
Answer:35652846437467
Step-by-step explanation:simple math
Step-by-step explanation:
1.23
hdhdjdjdhdhdhjdjdjdjd
Answer:
Jill
Step-by-step explanation:
Spanish:
Necesitamos asegurarnos de que ambas fracciones tengan el mismo denominador para descubrir quién se comió la porción más grande.
Ahora podemos comparar las tres fracciones y ver cuál tiene el numerador más grande
English:
We need to make sure both fractions have the same denominator to figure out who ate the bigger portion.
Now we can compare the three fractions and see which one has the larger numerator