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antiseptic1488 [7]
3 years ago
8

A school has two kindergarten classes. There are 21 children in Ms. Toodle's kindergarten class. Of these, 17 are "pre-readers"�

children on the verge of reading. There are 19 children in Mr. Grimace's kindergarten class. Of these, 13 are pre-readers. Using the plus four confidence interval method, a 90% confidence interval for the difference in proportions of children in these classes that are pre-readers is -0.104 to 0.336. Which of the following statements is correct?
A) This confidence interval is not reliable because the samples are so small.

B)This confidence interval is of no use because it contains 0, the value of no difference between classes.

C)This confidence interval is reasonable because the sample sizes are both at least 5.

D) This confidence interval is not reliable because these samples cannot be viewed as simple random samples taken from a larger population.
Mathematics
1 answer:
k0ka [10]3 years ago
7 0

Answer:

b

Step-by-step explanation:

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A small farm field is a square measuring 350 ft on a side. What is the perimeter of the field? If you double the length of each
rusak2 [61]

Answer:The new perimeter of the field is 2800 feet.

Step-by-step explanation:

The formula for determining the area of a square is expressed as

Area = 4L

Where L represents length of each side of the square.

The small farm field is a square measuring 350 ft on a side. This means that the perimeter of the field would be

Perimeter = 350 × 4 = 1400 feet.

If you double the length of each side of the field, the new length would be

350 × 2 = 700 feet.

The new perimeter of the field would be

700 × 4 = 2800 feet

8 0
3 years ago
Solve the system. x – y +z = 14 y +z = 15 z = 7 Enter your answer as an ordered triple.​
Firdavs [7]

Answer:

All you have to do is find out the answer on your own buddy.

Step-by-step explanation:

7 0
3 years ago
A yardstick casts a shadow of 24 in. At the same time a telephone pole casts a shadow of 20 ft 8 in. What is the height of the t
finlep [7]

Answer:

372 inches

Step-by-step explanation:

(1 yd = 36 in., and 1 ft = 12 in.)

1 yard stick = 24 in

This means , height of 36 inches casts a shadow of 24 Inches

At the same time a telephone pole casts a shadow of 20 ft 8 in

1 ft = 12 in

Hence,

Convey 20ft to inches

1 ft = 12 in

20 ft = 20 × 12 inches

= 240 inches

Total shadow of the telephone pole = 240in + 8 in = 248 = 248 inches

Hence,

Height/Length of shadow = Height/Length of shadow

36/24= x /248

Cross Multiply

24 × x = 36× 248

x = 36 × 248/24

x = 372 inches

The height of the telephone pole, to the nearest inch is 372 inches

5 0
3 years ago
0.54 + 17/100 = blank/100 + 17/00
krek1111 [17]

Answer:

54 i think

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Select all the expressions that are equivalent to 4b:
Alinara [238K]

Answer:

No. 1 , 3 and 5 is correct.

8 0
3 years ago
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