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Annette [7]
3 years ago
12

A survey of the mean number of cents off that coupons give was conducted by randomly surveying one coupon per page from the coup

on sections of a recent San Jose Mercury News. The following data were collected: 20% 75c; 50c; 65c; 300; 55 40C; 40C; 30C; 55, $1.50; 400; 65; 40C. Assume the underlying distribution is approximately normal. a. b. c. d. Define the random variables X and X in words. Which distribution should you use for this problem? Explain your choice. Construct a 95% confidence interval for the population mean worth of coupons. i. State the confidence interval

Mathematics
1 answer:
Luda [366]3 years ago
5 0

Answer:

Explanation has been given in the attachment.

Step-by-step explanation:

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If f(1) = 13 and f '(x) ≥ 3 for 1 ≤ x ≤ 3, how small can f(3) possibly be?
tangare [24]

Answer:

The answer to this question is 19.

Step-by-step explanation:

Given that :

f(x)=13.

f'(x)=3.   1 ≤ x ≤ 3.

Integrate

∫f'(x) dx=∫3 dx

f(x)=3x+c        1 ≤ x ≤ 3.

f(1)= 3+c  

c=13-3 =10.

f(x)=3x+10  1 ≤ x ≤ 3.

now ,

f(3)=3(3)+10=19.

So f(3) is at least 19.

6 0
3 years ago
In an orchard, there are 14 apple trees, 26 orange trees, and a cherry tree. What is the ratio of apple trees to cherry trees?
AlladinOne [14]

Answer:

The ratio of apple to orange is 3 to 7 because if you simplify 15 to 21, you get that answer.

Step-by-step explanation:

5 0
3 years ago
Im literally the most desperate person on the planet right now, this is due tomorrow please help:
11111nata11111 [884]

Answer:

6 lbs gummy bears (x), 2 lbs jelly beans (y), and 5 lbs gobstoppers (z)

Step-by-step explanation:

hope this helps

3 0
3 years ago
Peggy had three times as many quarters as nickels. She had $1.60 in all. How many nickels and how many quarters did she have?. .
Andru [333]

Let

n-------> the number of nickels

q------> the number of quarters

we know that

1\ quarter=\$0.25\\1\ nickel=\$0.05

so

0.05n+0.25q=1.60 ----> equation A

q=3n ----> equation B

substitute equation B in equation A

0.05n+0.25[3n]=1.60

0.05n+0.75n=1.60

0.80n=1.60

n=2

Find the value of q

q=3*2=6

therefore

<u>The answer part a) is</u>

the number of nickels are  2  and the number of quarters are 6

<u>the answer Part b) is</u>

The expressions that represents the number of quarters is

q=3n


5 0
3 years ago
Read 2 more answers
Write as a unit rate: 66 miles to 3 gallons *
gladu [14]

Answer: 22 miles per gallon

Step-by-step explanation: 66/3 = 22.

6 0
3 years ago
Read 2 more answers
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