Satistics

26 results

satistics

What is t? What is r2? n = 25 MD 4.7 s2 = 64

satistics

n=18,x=14,p=0.75 using binomial probablility

Satistics

Is this problem correct Answer: 0.90^5 = 0.6562

satistics

Rank the following data in increasing order and find the position and value of the 65th percentile. Please show all of your work. 2 1 6 3 4 7 0 0 0 7 5 8

Satistics

What is the probability that two 5 year old stink bugs will live to 6 years old?

History

BASED ON THE SATISTICS IN THE TEXT & YOUR KNOWLEDGE, WHICH OF THE FOLLOWING BEST DESCRIBES WHAT LIFE MIGHT HAVE BEEN LIKE FOR MOST IMMIGRANTS LIVING IN NEW YORK CITY IN THE 1800S?

satistics

Assume that the math SAT scores are normally distributed with a mean of 500 and a standard deviation of 100. If you score 560 on this exam, what percentage of those taking the test scored below you? semperfi

satistics

A test is composed of six multiple choice questions where each question has 4 choices. If the answer choices for each question are equally likely, find the probability of answering more than 4 questions correctly.

a set of integers consists of 2,3,5,7,11,12,x. if x is increased by 1 the median of the set stays unchanged. however, if x decreases by 1, the median of the set also decreases by 1. what is the value of x?

Satistics Help

A student claims that if the odds in favor of winning a game are a:b, then out of every a+b games she would win a games. Hence, the probability of the event of winning the game is a/b+b Is the student's reasoning correct? why or why not?

science

I am doing a paper on the maritime ringlet butterfly. I've been through quite a bit of sites but I can't seem to get a hold of satistics on the estimation of how many maritime ringlet butterflies remain, or even any sort of stats at all. I also can't seem to understand what ...

Satistics

Assume that the mean hourly cost to operate a commercial airplane follows the normal distribution with a mean of \$2,175 per hour and a standard deviation of \$175. What is the operating cost for the lowest 10 percent of the airplanes? (Round z value to 2 decimal places. Omit ...

satistics

Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of 0.2 inches and a standard deviation of 0.05 inches. What proportion of woodlice have antenna lengths that are more than 0.27 inches? Round your answer to at least four decimal ...

satistics

The average time a student spends studying just prior to a test is 36 minutes with a standard deviation of 5 minutes. This distribution approximates a normal curve. Find the percent of students who study just prior to the test for. a) more than 40 minutes b) between 35 and 45 ...

Probability and Satistics

Random Variables X and Y follow a joint distribution: f(x,y)=(6-x-y)/8 if 0<x<2, 2<y<4 and 0, else Find P(1<Y<3|X=1) I first got the marginal distribution for x and got (3-x)/4 (Integrated from 2 to 4)and then got the conditional dist and got (5-y)/4 and then...

Satistics

5. Give the standard deviation for the mean and median column. Compare these and be sure to identify which has the least variability? Standard deviation of Mean = 0.476169 Standard deviation of Median = 0.753937

satistics

assume the probability that an electronic device will have a type 1 defect is 1% and the probability that it will have a type 2 defect is 2%. given that these two defects are not independent ,what is the probability that an item randomly selected has both a type 1 and type 2 ...

Satistics

A company that produces detergents wants to estimate the mean amount of detergent in 64-ounce jugs at a 99% confidence level. The company knows that the standard deviation of the amounts of detergent in all such jugs is .20 ounce. How large a sample should the company select ...

Satistics

**I don't want the answer, I want to know how to set the problem up and the formula that I need to use. I am online with a tutor right now, and they can't help me. :-( The average price of a gallon of unleaded regular gasoline was reported to be \$2.34 in northern Kentucky (The...

satistics

Among a random sample of 500 college students, the mean number of hours worked per week at non-college related jobs is 14.6. This mean lies 0.4 standard deviations below the mean of the sampling distribution. If a second sample of 500 students is selected, what is the ...

Elementary Satistics

Test the following function to determine whether it is a probability function. If it is not, then make it into a probability function. (Give your answers correct to one decimal place.) R(x) = 0.2, for x = 0, 1, 2, 3, 4 (a) List the distribution of probabilities. R(0) =0 ...

Satistics

Monthly incomes of employees at a particular company have a mean of \$5954. The distribution of sample means for samples of size 70 is normal with a mean of \$5954 and a standard deviation of \$259. Suppose you take a sample of size 70 employees from the company and find that ...

Satistics

Jody checked the temperature 12 times on Monday, and the last digit of the temperature was odd six times more than it was even. On Tuesday, she checked it 18 times and the last digit was odd eight times more than it was even. Determine which series is closer to the 50/50 ratio...

Satistics

In North American, female adult heights are approximately normal with a mean of 65 inches and a standard deviation of 3.5 inches. a.) If one female is selected at Random, what is the probablility that shes has a height 70 inches or higher? b.) The heights of 50 females were ...

satistics

3.Give the mean for the mean column of the Worksheet. Is this estimate centered about the parameter of interest (the parameter of interest is the answer for the mean in question 2)? Mean 3.50 Standard deviation 1.317 4.Give the mean for the median column of the Worksheet. Is ...

Satistics

The human resources department of a consulting firm gives a standard creativity test to a randomly selected group of new hires every year. This year, 80 new hires took the test and scored a mean of 112.5 points with a standard deviation of 17.3. Last year, 55 new hires took ...

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