1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Arlecino [84]
3 years ago
14

A statistic is said to be unbiased if

Mathematics
1 answer:
xxMikexx [17]3 years ago
8 0

Answer:

A statistic is said to be unbiased if the mean of its sampling distribution is equal to the true value of the parameter being estimated.

Step-by-step explanation:

A parameter is a number that describes the population.  

A statistic is a number that describes a sample.  

A statistic used to estimate a parameter is unbiased if the mean of its sampling distribution is exactly equal to the true value of the parameter being estimated. For example, the mean of a sample is an unbiased estimate of the mean of the population from which the sample was drawn.

A statistic is biased if its expected value is not equal to the parameter.

You might be interested in
Students sold books to the local library as a part of a school drive. paper books were brought for $1.45 each. The library spent
nalin [4]

Answer:

213 books

Step-by-step explanation:

Paper books = $1.45 each

$ 1.45 = 1 paper book

$ 1 = 1/1.45 paper book

$98.6 = 98.6/1.45 paper books

$ 98.6 = 68 paper books

Hardback books = $ 2.25 each

$2.25 = 1 Hardbook

$1 = 1/2.25 hardbook

$ 328.10 = 328.10/2.25 hardbooks

$ 328.10 = 145.822 hard books

Number of books cannot be a decimal number, so the value has to be estimated to a nearer whole number.

$ 328.10 = 145 hard books

Total number of books bought = (145 + 68)books= 213 books (Answer)

4 0
3 years ago
Solve this A tourist starts off from town A and travels for 50km on a bearing of N80°W to town B.At town B ,he continues for ano
VLD [36.1K]

Answer:

The point C is 12.68 km away from the point A on a bearing of S23.23°W.

Step-by-step explanation:

Given that AB is 50 km and BC is 40 km as shown in the figure.

From the figure, the length of x-component of AC = |AB sin 80° - BC cos 20°|

=|50 sin 80° - 40 cos 20°|=11.65 km

The length of y-component of AC = |AB cos 80° - BC sin 20°|

=|50 cos 80° - 40 sin 20°|= 5 km

tan\theta= 5/11.65

\theta=23.23°

AC= \sqrt{5^2+11.65^2}=12.68 km

Hence, the point C is 12.68 km away from the point A on a bearing of S23.23°W.

8 0
2 years ago
How should this model be completed to represent 820 ÷ 17
EleoNora [17]

Answer: 820/17 lol

Step-by-step explanation: coz I juss know

5 0
3 years ago
What did the pyramids show about the old kingdom dynasties of egypt?
igor_vitrenko [27]
Here is the answer to the given question above. The pyramids show <span>strong leadership and economy, government, good supply of stone, well developed math and engineering skills of the old kingdom dynasties of Egypt. Hope this answers your question. Have a great day!</span>
3 0
3 years ago
Use the Pythagorean Theorem to find the length of the leg in the triangle shown below. The figure shows a right triangle with on
Natali5045456 [20]

Answer:

36

Step-by-step explanation:

you would just to 39^2-15^2 which is 1296 and the square root of that is 36 so 36 would be the answer

3 0
3 years ago
Read 2 more answers
Other questions:
  • Find the slope of the line that passes through the following points
    14·1 answer
  • The width of a rectangle is 6 in. less than its length. The perimeter is 68 in. What is the width of the rectangle?
    8·2 answers
  • a case of water bottles contains 36 bottles. each bottle contains 8 ounces. if helen buys 12 cases of water bottles, how many ou
    5·1 answer
  • You have used 500 quarts of water 85% of water remain how many quarts of oil
    10·1 answer
  • Johan always wears a shirt, pants, socks, and shoes. He owns 20 pairs of socks, 5 pairs of shoes, 10 pairs of pants, and 8 shirt
    12·2 answers
  • the hiking club plans to go camping In a state park where the probability of rain on any given day is 0.7. which expression can
    9·1 answer
  • Of the 68 students on a field trip 17 students bring a camera. What percent of the students bring cameras?
    9·1 answer
  • PLEASE HELP I HAVE A 31 IN MATH THIS IS A REALLY IMPORTANT TEST
    5·2 answers
  • I had 3 apples. I add 2 more apples. How many apples do I have?
    6·1 answer
  • A school fundraiser needs to raise a total of $1000. The students are selling artwork for $25 a piece. They have already raised
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!