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hammer [34]
3 years ago
13

As we study random variables, the idea of z-scores will come up again. What is a z-score (in words) and what is the formula for

finding a z-score?
Mathematics
1 answer:
arsen [322]3 years ago
7 0
For a confidence interval with level C, the value p is equal to (1-C)/2. A 95% confidence interval for the standard normal distribution, then, is the interval (-1.96,1.96), since 95% of the area under the curve falls within this interval. <span>The point estimate for the </span>population proportion<span> is the sample proportion, and the margin of error is the product of the Z value for the desired confidence level (e.g., Z=1.96 for </span>95%<span> confidence) and the standard error of the point </span>
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Last year, the tree in Pedro's front yard was 5.6 feet tall. This year, the tree is 2 feet less than the hight of Pedro's house.
Ede4ka [16]
It actually doesn't matter how tall is Pedro's try last year. This year it is 2 feet less than his house, which doesn't grow. 
17-2=15feet
5 0
3 years ago
Read 2 more answers
Two exterior angles of a triangle equal 100° and 150°. Find all the interior angles.
Papessa [141]

Answer:

The interior angles are  80°, 30° and 70°.

Step-by-step explanation:

The sum of interior angle of a triangle is 180°. Two exterior angle of the triangle is given as 100° and 150°.  The exterior angle of a triangle is equal to the sum of the opposite interior angle. The exterior angle is the angle between one side of a triangle .

Since angle on a straight line = 180°

Two interior angles can be calculated as follows

180 - 100 = 80°

180 - 150 = 30°

2 interior angles are known.

Note the sum of interior angle of a triangle is 180°

since 2 interior angle are known the third angle can be calculated as follows

180 - 80 - 30 = 70°

The interior angles are  80°, 30° and 70°.

3 0
4 years ago
Lauren bikes 1 1/3 mi in 1/10 hour. what is her rate of speed in miles per hour?
Natasha2012 [34]
1 1/3 miles 1/10 of an hour = 60/10 = 1 1/3 miles every 6 minutes
Thus she travels 10*6=60 Minutes = 10* 1 1/3 miles per hour = 13.3333 or 13 1/3 miles per hour.
7 0
4 years ago
College student makes decorative Styrofoam Lions and Husky's which she sells each year. Each one uses 8 oz of Styrofoam and take
Travka [436]

Answer:

She should make 122 Styrofoam lions and 268 Styrofoam Husky's

The maximum profit, she makes is  $1109

Step-by-step explanation:

The given information are;

The volume required to make each lion = 8 oz

The time it takes to make each lion = 35 minutes

The amount of profit each lion brings = $2.50

The volume required to make each Husky = 12 oz

The time it takes to make each Husky = 20 minutes

The amount of profit each Husky brings = $3

Let the number of lion Styrofoam cups she makes = x

Let the number of Husky Styrofoam cups she makes = y

Therefore, we have;

x × 35 + y × 20 = 9650..........(1)

x × 8 + y × 12  = 3840.............(2)

Dividing equation (2) by 8 and making x the subject, we get;

x × 8/8 + y × 12/8  = 3840/8

x + 4/3·y = 480

x = 480 - 4/3·y

Substituting the value of x in equation (1) gives;

(480 - 4/3·y) × 35 + y × 20 = 9650

16800 - 80/3·y = 9650

y = 268.125

x = 480 - 4/3·y  = 480 - 4/3×268.125 = 122.5

Therefore, she can make 122 Styrofoam lions and 268 Styrofoam Husky's

The maximum profit, she makes is therefore given by the following equation;

The maximum profit = 122 × 2.5 + 268 × 3 = $1109.

5 0
3 years ago
What number is 3.4 more than 7.3?
finlep [7]

Answer: 3.4+7.3= 10.7

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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