# STAT

368 results

### Health

Sometimes a patient needs additional care that his or her regular physician cannot provide. In this instance, the physician can make a referral for a patient to see another physician. What are the three types of referrals? (1 point) regular, urgent, fast normal, fast, STAT ...

### statistics

survey revealed two percent of students did not select stat. for biz. suppose we select a sample of 10 students. -what is the probability that 3 students selected stat. for biz? -how many students would you expect to select stat.for biz?

Suppose that each student in stat. has a 9% chance of missing class on any given day and that student attendance is independent. In a stat. class of 20 students, find the probability that: 1) no student is absent =15.16 2) one student is absent =30 3) three student is absent =...

### Math Help

Suppose that each student in stat. has a 9% chance of missing class on any given day and that student attendance is independent. In a stat. class of 20 students, find the probability that: 1) no student is absent 2) one student is absent 3) three student is absent 4) at least ...

### math

The probability that a person has immunity to a particular disease is 0.3. Find the mean and standard deviation for the random variable x, the number of people who have immunity in samples of size 28. This is a binomial distribution. mean= 28*.3 standard deviation= sqrt (28*.3...

### algebra 2

Question: Write the equation of a cubic function that has the x-intercepts of -4, 2, and 5 and passes through the point (6,20) My Answer: y = .5x^3-1.5x^2-9x+20 What I did: Put the x-intercepts and given point into stat plot (on calculator) then hit stat -> calc -> cubic...

### Prob/Stat

If P(A) = .3 and P(B) = .4 and P(AandB) = .2 what is P(A/B)? P(B/A)? Are A and B indepentent?

### Stat

P(A)=.10, P(B)=.30, P(C)=.40, P(D)=.10, P(F)=.10. Determined the expected grade and variance for the course.

### stat

I posted a question but never got an answer.

### chemistry

which element has the ground-stat electron configuration [Ar]4s^2 3d^10?

### STAT

A random variable X2 assumes only positive value.?

### stat

The mean of a normal probability distribution is 60; the standard deviation is 5

### stat

When rolling a die, is this an example of a discrete or continuous random variable?

### juvenile deliquency

Compare and contrast the stat and local diversionary programs

### Math- Prob Stat

How do you determine if a raffle or casino game is fair?

### probability

A coin is biased such that a head is thrice as likely to occur as a tail. Find the probability distribution of heads and also find the mean and variance of the distribution when it is tossed 4 times. See http://www.stat.yale.edu/Courses/1997-98/101/binom.htm Let p be the ...

### Stat B

How many standard deviations away from the mean do the quartiles lie in any normal distriubiton?

### stat

Standard deviation for the following sets and compare the differences. first 7 #'s 57 61 57 57 58 57 61 second 7#'s 61 52 69 64 46 54 47

### stat

Use table A - 2 to find the probability of a randomly selected value is between 0.7 and 1.98.

### stat

A 95% confidence interval for a difference in proportions p1-p2 if the samples have n1=70 with p^1=0.64 and n2=90 with p^2=0.58, and the standard error is SE=0.08.

### stat

The total area under the normal distribution curve is equal to a probability of____

### Stat

Please help with this problem, not sure calculate it. Consider the standard normal distribution and find P(-1.5 < Z < 2.35).

### stat

let x and y be continuous random variables having joint density f(xy)=a^2 e^-ay, 0<=X<=Y. Find the marginal densities of X an Y.

### stat math

Stat hw question help me please? In a high profile murder case a sample of the general public's opinions concerning the guilt or innocence of the defendant is taken. A sample of n=100 males results in 62% of the respondents beliving that the defendant is guilty, while a sample...

### health

what is a catchy starting sentence to stat talking about " hip replacement system recall"?

### stat

couple plans to have four children what is the probability that three are girls and one is a boy

### Math

For a stat class the mean of the midterm is 75 with a standard deviation of 7. What percentage of students scored between 67 and 83

### Stat

In statistic regressions, does "standard error" mean the residual (vertical distance of each point from the regression line)?

### Math(Stat)

If the tube were guaranteed to last for 600 hours, what percent of the tubes may have to be replaced under the guarantee

### STAT

Let X be equal to the number of heads from tossing a coin twice. Verify that the following is the probability mass function of x. p(X x)=1/2(2-x)x!

### STAT

Determine the mean and standard deviation of the random variable for which the probability mass function is defined as follows: P(X=x)= x-2/30 if x=3,12,21

### Stat

What particular measure of correlation would be most appropriate for use with two variables measured at an ordinallevel?

### stat

if the heights of men follow a normal distribution, and 99.7% fall between 5" and 7" what is the estimate standard deviation of the height?

### STAT

Explain what each of the three most widely used measures of central tendency indicate to a psychological researcher.

### Stat

three identical chips, each with 0 on one side and 1 on the other, are the tossed simunltaneously. a. write the sample space

### Stat

the teacher wants me to make a survey questions about a sample and get a statistical data from it, how? including variance and standard deveriation. thanks

### Stat College

what proportion of a normaql distribution is located between each of the following z- score boundaries? a. z= -0.50 and z = +0.50 b. z= - 0.90 and z= +0.90 c. z= -1.50 and z= +1.50 How will I know the question has been answered

### HIT stat

Present, in your own words, how information systems help support the risk management function of a healthcare organization

### statistic

A power model is shown below. Determine the residual for the observed data x = 7 and y = 70. stat answer question 9 (1 point) 71.37 1.37 1.85 –1.37

### stat

a sample of 150 adults is composed of 100 women and 50 men. estimate the standard error of the proportion for the female population

### stat

a how to solve the problem when on 100 point examination with mean 60, SD 10, if there are 5% A, 5% F, 15% B, 15% D, and 60% C, find the scores that devide the distribution into those catagories.

### stat

Find the area under the standard normal curve to the left of z = 1.88, P(z < 1.88). (Give your answer correct to four decimal places.)

### Stat

the four wealthiest people in a particular country are 46,33,27,15 assume that samples of size n=2 are randomly selected with replacement from this population of 4 values?

### grammar

after graduating from te dog acadeny wivues decide to stat is own rock and roll band identify declarative or interrogative

### stat

2. You just bought a used truck for \$10,000 and it loses value at a rate of 10% per year. What is it worth two years later?

### STAT

Jet blue states the average air fare from Toronto to LA is \$1455 with a SD of \$123.56. What is the 99% confidence interval with a sample size of 64 airfares

### intermediate algebra

Solve uing the subtitution method. Show your work. If the system has no solution or an infinite number of solutions, stat this,3x-15y=-12 3x+24y=-12

### Stat

a large no. of bonobos were found to be normally distributed with a mean of 46 and a variance equal to 9. if each of their scored is increased by 5 points, what percentage of the new scores is less than 50?

### stat

Given the Variable X measured at a Nominal Level, what descriptive statistical indice would you give if asked to provide the most representative value of the se

### stat

Explain why using the t statistic may be an appropriate alternative to using a z-score

### stat

A set of n = 5 pairs of X and Y values has SX = 10, SY = 20, and SXY = 10. For this set of scores, what is the value of SP?

### stat

Find the sample variance s2 for the following sample data. Round your answer to the nearest hundredth. x: 23 17 12 35 29

### stat

A sample consists of the following data 7,11,12,18,20,22,25. What is the sample variance?

### MATH

I NEED HELP WITH MY LEAP MATH MIDTEST QUESTIONS STAT!

### stat

Help my name is Gee and i have posted several question on and ive waited for help and no one will answer can someone please assist me. My post were on Sept 13 and 18 2012 thank you

### Stat

when you are comparing two sets of data, and one set is strongly skewed and the other is symmetric, which measures of the center and variation should you choose for the comparison?

### Help with College Stat class

c) There is a correlation between students’ levels of anxiety and the number of days they are absent from school (r = 0.53, p = 0.31). Interpret if this result was statistically significant and explain why or why not.

### stat in psyc

A normal distribution has µ = 80 and standard deviation = 10. What is the probability of randomly selecting a score greater than 90 from this distribution

### stat

When a confidence interval for a population proportion is constructed for a sample size n = 100 and the value of, p = .4 the interval is based on the (Points : 1)

### English

I need help finding a chart/stat about how many students go for online education instead of face-to-face and the progress of it.

### Prob&Stat

If 52% of the customers at a certain grocery store regularly use coupons, what is the approximate standard deviation of the sampling distribution of the proportion for samples of size 240? 2.1% 3.2% 4.7% 10.4%

### stat

a credit card company estimated that 62% if its customers are males. The company is considering a randomly selected sample of five people.

### stat probability

A coin is tossed 4 times. Find the probability that the 4th toss is a tail, given that the first 3 tosses were all heads.

### STAT

The score on a test are normally distributed with a mean of 75 and a standard deviation of 6. If the professor wishes to give A’s to the top 4%, what would be the cutoff score be for A’s?

### stat

Assume that the table below represents the distribution of X. Note that X is a discrete random variable. The second column reports the number of observations for each value of X. Based on this information, what is the variance of X? X n 20 10 25 10 30 5 15 10 10 5

### STAT

If ì1 and ì2 represent the mean depression score for male teens and female teens respectively, which of the following is the appropriate pair of hypotheses in this case? (a) (b) (c) (d) (e) Both (c) and (d) are correct.

### stat

wolf has an average weight of 44 lbs. with a standard deviation of 3 lbs. what percent of wolves weigh under 40 lbs.?

### Stat

For a sample of 200 patients diagnosed with allergies, 25 were men. What is the 90% confidence interval for the population proportion? I set this up and got the answer of .087 -.16. The book has .091-.17. Could use help---I must be missing something.

### College Stat

A pair of fair dice is rolled. What is the probability of each of the following? (Round your answers to three decimal places.) (a) the sum of the numbers shown uppermost is less than 5 and (b)at least one 5 is cast

### Stat Help

The Momoland Springs Company claims that there are at most 1 ppm (parts per million) of benzene in their water. Test at a=.10 n=25 = 1.10 ppm s = .20 ppm

### stat

please help!! pretty please!! i need to know how to this problem ASAP! suppose you pay \$1.00 to roll a fair die with the understanding that you will get back \$3.00 for rolling a 5 or a 1, nothing otherwise. what is your expected value?

### stat probability

The number of movies shown in different theatres on Saturday morning in a small city is given in the following. x P(x) 1 0.15 2 0.20 3 0.30 4 0.10 What is the mean distribution (or expectation) of the data given above?

### stat

given an exponential distribution with mean = 30 what is the probability that the arrival time is a) less than X = 0.1 B) greater than X = 0.1 c) between X=0.1 and X =0.2 d) less than X =0.01 or greater than X = 0.2

### STAT 250..Help!

What is the probability of randomly selecting a z-score less than z = 0.80 from a normal distribution? a)-0.2119 b)0.7881 c)0.2119 d)-0.7881

mu1 - mu2 >0 is a two tail test or right tail test??

### STAT 250..Help!

What is the probability of randomly selecting a z-score less than z = –0.80 from a normal distribution? a)-0.2119 b)0.7881 c)0.2119 d)-0.7881

### prob. & stat

A traveler has 7 pieces of luggage. How many ways can he select 3 pieces of luggage for a trip? a. 5040 b. 210 c. 35 d. 28

### stat

about 35% of a population has blue eyes if four different people are randomly selected what is the probability that they all have blue eyes?

### stat probability

Find the mean of the distribution shown. x 2 5 7 P(x) 0.28 0.42 0.30 What is the mean and the standard deviation of this distribution?

### Stat & Prob.

Show that if Cov(X,Y)=0, then the correlation coefficient satisfies p(X+Y, X-Y)=Var(X)-Var(Y)/ Var(X)+Var (Y)

### Stat

α=0.05 for a two-tailed test. Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. Is the correct answer +/- 1.96?

### stat

The emission of 10 engines is found to be: 15.6, 16.2, 22.5, 20.5, 16.4, 19.4, 16.6, 17.9, 12.9, 13.9. The mean emission must, according to regulations, be u (mean) greater than 20 parts per million. Test this at a significance level of a equal to 0.01

### prob. & stat

A group of 150 students were asked to identify 55 flowers. The relative frequency table shows the results. About how many students identified at least 42 flowers? 0-6 5 7-13 14 14-20 6 21-27 11 28-34 19 35-41 29 42-48 13 49-55 3

### Math - Stat !!!!

A 3 x 5 table is considered to test the association of two variables having 3 and 5 categories respectively. A Chi-square test statistic with value 19.0 was obtained. What is the degrees of freedom associated with this test?

A linear model can be used to describe the relationship between fuel economy(mpg) and horsepower (hp) for certain automobile models. mpg=46.868-0.0838 hp R^2=75.5% 1) Give the symbol and the value of the correlation coefficient.

### stat

Draw a vertical line through a normal distribution for each of the following z- score locations. Determine whether the body is on the right or left side of the line and find the proportion in the body. (a). z = 2.20 (b) z = 1.60 (c) z = -1.50 (d) z = - 0.70

### Chemistry

Consider the last electron in B: Values for n,l,and ml of 2,0,0 cannot be used. Why not? so is this the same answer as lithium. The ground stat cant have l=2 since it has no p electrons? Are values of 3,0, 0 allowed? Why or why not? I would say no for the same reason. Are ...

### stat

Construct a 90% confidence interval for the population mean. Assume the population has a normal distribution. A same of 15 randomly selected math majors has a grade point average of 2.86 with a standard deviation of 0.78. Round to the nearest hundredth. Answers: a) (2.41,3.42...

### world history

How do I find the racial/ethnic, lanuage, and religious demographics of a popluation of 6 million This site lists all of that information about the countries and territories of the world. https://www.cia.gov/cia/publications/factbook/index.html Thank you for using the Hiskha ...

### College Stat

Draw a vertical line through a normal distribution for each of the following z- score locations. Determine whether the body is on the right or left side of the line and find the proportion in the body. (a). z = 2.20 (b) z = 1.60 (c) z = -1.50 (d) z = - 0.70

### stat probability

A multiple choice quiz consists of 20 questions, each with 3 possible equally likely answers. If a student guesses at the answer to each question, then the mean number of correct answers selected by the student is?

### stat

EXERCISE: THE MULTIPLICATION RULE (4 points possible) Are the following statements true or false? (Assume that all conditioning events have positive probability.) P(A∩B∩Cc)=P(A∩B)P(Cc∣A∩B)

### STAT

A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer. Find the probability that the student passes the quiz with a grade of at least 70% of the questions correct

### Math

The mean time to complete a certain stat quiz is 25 minutes, with a standard deviation of 5 minutes. Find the probability of a student taking. 1.) less than 15 minutes. 2.) Between 15 and 25 minutes. 3.)more than 25 minutes.

### probability and statistics.

So here I am trying to do my prob/stat homework and I keep coming across this word that I don't understand. The word is "inferior". My book has no glossary and I cannot find a definition that makes sense.Can somebody help me understand?

### stat

What is the probability of getting a license plate that has a repeated letter or digit if you live in a state that has four letters followed by three numerals followed by two letters? (Round to the nearest whole percent.)

### stat mech

how to solve this problem 3. Five moles of an ideal monatomic gas with an initial temperature of 127 °C expand and, in the process, absorb 1200 J of heat and do 2100 J of work. What is the final temperature of the gas?

### Stat

Suppose there are 2 black, 3 white, and 5 red marbles in an urn. You reach in and randomly select 3 marbles without replacement. And let X be the number of black marbles. Find the probability table for X.

### Stat

The lengths of pregnancies in a small rural village are Normally distributed with a mean of 268 days and a standard deviation of 12 days. What percentage of pregnancies last beyond 290 days?

### Maths, mechanics, stat

A molecule has a rotational inertia 14000amupmsquare spining at an angular speed of 4. 30x10exponent12 radpersecond a) express the rotational inertia in kgmsq b)calculate rotational kinetic energy in EV.

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