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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:

You might be interested in
which one of the following examples represents a repeating decimal A. 1.111114 B. 0.777777 C. 4.252525 D. 0.123123
elena-s [515]
Actually, i think something is missing here:

You need either a parenthesis or some dots at the end to determine this. A repeating decimal can have one repreating digit:

0.(7): 0.777777...

two:

0.(45): 0.45454545454545....

or more: so potentially all of them can be repeating, even a!

it could be: 1.(111114)

or: 1.111114111114111114111114111114111114111114111114111114111114111114111114111114...

proably B. is the most typical of repeating decimals (choosed this one if you have to), but in reality, you need more information... did you copy the question exactly?
7 0
3 years ago
Twenty times a square of a positive integer plus 50 equals negative 40 times the square of the positive integer plus one-hundred
rusak2 [61]
20x^2+50 = -40x^2+110x [ Taking x as the unknown positive integer ]
4 0
3 years ago
Karen bought 4⁄5 pound of broccoli and 2⁄10 pound of cauliflower. How many more pounds of broccoli did she buy?
Nitella [24]

Answer:

6/10 or 3/5

Step-by-step explanation:

4/5 = 8/10

8/10 - 2/10 = 6/10 or 3/5

6 0
3 years ago
Read 2 more answers
4/4 times 1/2 PLEASE HURRY ILL MARK BRAINLIEST
mars1129 [50]

Answer: 1/2

Step-by-step explanation:4

4

×  

1

2

=  

1

2

Result in decimals: 0.5

Calculation steps:

4

4

×  

1

2

=  

4 × 1

4 × 2

=  

4

8

=  

4 ÷ 4

8 ÷ 4

=  

1

2

Further explanation

For the problem:

4

4

×  

1

2

= ?

Multiply all of the numerators by each other. Do the same with the denominators and form a new fraction with these values:

4 × 1

4 × 2

=  

4

8

The Greatest Common Factor (GCF) of 4 and 8 is 4. The result can be simplified by dividing both the numerator and denominator by 4.

4

8

=  

4 ÷ 4

8 ÷ 4

=  

1

2

The result is:

4

4

×  

1

2

=  

1

2

8 0
3 years ago
Read 2 more answers
Which angle pairs are supplementary? Check all that apply.
Greeley [361]

Answer:

4 and 3, 4 and 5, 3 and 6

Step-by-step explanation:

Those angles make 180 degrees.

3 0
3 years ago
Read 2 more answers
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