Recent questions in Pre-Algebra

Ratios, rates, proportions
Answered

York
2021-02-05

Wierzycaz
2021-02-05

"There exists a negative real number z such that -3

opatovaL
2021-02-05

Measurement
Answered

Chesley
2021-02-04

a) A single measurement is made on this scale. What are the bias and uncertainty in this measurement?

b) Four independent measurements are made on this scale. What are the bias and uncertainty in the average of these measurements? c) Four hundred independent measurements are made on this scale. What are the bias and uncertainty in the average of these measurements?

d) As more measurements are made, does the uncertainty get smaller, get larger, or stay the same?

e) As more measurements are made, does the bias get smaller, get larger, or stay the same?

Decimals
Answered

Nannie Mack
2021-02-04

a) What is the probability that all three have operated heavy machinery while under the influence of alcohol?

b) What is the probability that at least one has not haavy operated heavy machinery while under the influence of alcohol?

c) What is the probability that none of three have operated heavy machinery while under the influence of alcohol?

d) What is the probability that at least one has operated heavy machinery while under the influence of alcohol?

Reading and interpreting data
Answered

foass77W
2021-02-04

Fractions
Answered

preprekomW
2021-02-03

Ratios, rates, proportions
Answered

Lewis Harvey
2021-02-03

Decimals
Answered

texelaare
2021-02-03

Factors and multiples
Answered

nicekikah
2021-02-02

amanf
2021-02-01

Which expression below is equivalent to

(A)

(B)

(C)

(D)

Decimals
Answered

mattgondek4
2021-01-31

Marvin Mccormick
2021-01-31

. The imaginary unit i is defined as i = _______ , where i2i

= _______ .

Decimals
Answered

Trent Carpenter
2021-01-31

factor in determining the usefulness of an examination as a measure of demonstrated ability is the amount of spread that occurs in the grades. If the spread or variation of examination scores is very small, it usually means that the examination was either too hard or too easy. However, if the variance of scores is moderately large, then there is a definite difference in scores between "better," "average," and "poorer" students. A group of attorneys in a Midwest state has been given the task of making up this year's bar examination for the state. The examination has 500 total possible points, and from the history of past examinations, it is known that a standard deviation of around 60 points is desirable. Of course, too large or too small a standard deviation is not good. The attorneys want to test their examination to see how good it is. A preliminary version of the examination (with slight modifications to protect the integrity of the real examination) is given to a random sample of 20 newly graduated law students. Their scores give a sample standard deviation of 70 points. Using a 0.01 level of significance, test the claim that the population standard deviation for the new examination is 60 against the claim that the population standard deviation is different from 60.

(a) What is the level of significance?

State the null and alternate hypotheses.

(b) Find the value of the chi-square statistic for the sample. (Round your answer to two decimal places.)

What are the degrees of freedom?

What assumptions are you making about the original distribution?

We assume a binomial population distribution.We assume a exponential population distribution. We assume a normal population distribution.We assume a uniform population distribution.

Measurement
Answered

Tyra
2021-01-31

Getting your pre Algebra solved becomes much easier when you have all the answers to your questions by taking a closer look at the various examples dealing with Pre-Algebra subjects. We have intentionally collected the list of pre-algebra equations and various solving equations with decimals problems to help you see various examples that explain how certain solutions are found. Still, if something sounds unclear or you are concerned about some solution that has been provided, approach pre-algebra with reverse engineering approach (going backwards).