# A theater owner has found that 5% of patrons do not

Get college assignment help at uniessay writers A theater owner has found that 5% of patrons do not show up for the performance that they purchased tickets for. If the theater has 100 seats, find the probability that 6 or more patrons will not show up for the sold-out performance.

## If X is Uniform over the interval [0,1] then the square

If X is Uniform over the interval [0,1] then the square root of X is also uniform over the same domain. True or False

## ransportation officials tell us that 60% of drivers wear seat belts

ransportation officials tell us that 60% of drivers wear seat belts while driving. What is the probability that between 509 and 521 drivers in a sample of 900 drivers wear seat belts?

## The median is often a better representative of the central value

The median is often a better representative of the central value of a data set when the data set: A. Is Bimodal B. Is highly skewed C. Has a high standard deviation. D. Has no outliers.

## Eight tyres of different brands are ranked from 1 to 8

Eight tyres of different brands are ranked from 1 to 8 (best to worst) according to mileage performance. If four of these tyres are selected at random

## The mean weight of loads of brick is 46.0 tons with

The mean weight of loads of brick is 46.0 tons with a standard deviation of 8.0 tons. Twenty – five loads are chosen at random for a weight check. Find the probability that the mean weight of those loads is less than 44.24 tons. Assume that the variable is normally distributed.

## A independent poll of college students showed that fifty percent of

A independent poll of college students showed that fifty percent of college students watch the Winter Olympics . For a sample of 120 students selected at random, what is the mean and variance of the number of students who watch this event?

## In reviewing batting averages for minor league baseball players, it was

In reviewing batting averages for minor league baseball players, it was found that the batting average is 0.340 or 34% for a player having a good season, find the probability that the player will have a bad season by having 60 hits in 200 times at bat.

## A seed compnay has a test plot in which it is

A seed compnay has a test plot in which it is testing the germination of a hybird seed. They plant 50 rows of 40 seeds per row. After a two-week period, the researchers count how many seed per row have sprouted. They noted that least number of seeds to germinate was33 and some rows had all 40 germinates. The germination data is given below. The random variable x represents the number of seed in a row that germinates and P(x) represents the probability of selecting a row with that number of seeds germinating. Determine the standard deviation of the number of seeds per row that germinated. x: 33 34 34 36 37 38 39 40 P(x):0.02 0.06 0.10 0.20 0.24 0.26 0.10 0.02

## Twenty-eight items are randomly selected from a population of 260 items.

Twenty-eight items are randomly selected from a population of 260 items. The sample mean is 38 and the sample standard deviation 5. Develop a 90 percent confidence interval for the population mean.

## Question 2, 4 and 8

Get college assignment help at uniessay writers Question 2, 4 and 8

## Questions 2, 4 and 8

Questions 2, 4 and 8

## The mean height of all cadets who have ever entered West

The mean height of all cadets who have ever entered West Point is 69 inches

## Hi! I’ve been sick and running a 101 fever for the

Hi! I’ve been sick and running a 101 fever for the last week so I’m completely lost on this assigment. I’ve been working on it for hours and I haven’t gotten anywhere. Can somebody point me in the right direction?

## a statistics professor plans classes so carefully that the lenghts of

a statistics professor plans classes so carefully that the lenghts of her classes are uniformly distributed between 50.0 and 52.0 minutes. find the probability that a given class period runs less than 50.75 minutes.

## Hi, I’m completely lost on this question. Can you help? A

Hi, I’m completely lost on this question. Can you help? A weight–lifting coach claims that weight–lifters can increase their strength by taking a certain supplement. To test his theory, the coach randomly selects 9 athletes and gives them a strength test using a bench press. Thirty days later, after regular training using the supplement, they are tested again. The results are listed below. Test the claim that the supplement is effective in increasing the athlete’s strength. Use significance 0.10 and assume that the data are distributed normally. Before: 215 240 188 212 275 260 225 200 182 After: 225 245 188 210 282 275 230 195 190 Difference: –10 –5 0 2 –7 –15 –5 5 –8 Difference: n = 9, D¯ = –4.78, s = 6.24 What is the appropriate set of hypotheses (H0, H1)? What is the correct value of the test statistic? What is the correct P–value for this test statistic? Does the supplement significantly increase the athletes’ strength? I’m not asking you to answer it for me, I just want to understand how to do it. Thanks!!!!

## What is the point estimate of the difference between the mean

What is the point estimate of the difference between the mean annual consumption in Webster City and the national mean

## The p-value measures the support (or lack of it) provided by

The p-value measures the support (or lack of it) provided by the sample for the alternative hypothesis, and is the basis for determining whether the null hypothesis should be rejected given the level of significance.

## 1. Use the method specified to perform the hypothesis test for

1. Use the method specified to perform the hypothesis test for the population mean . A fast food outlet claims that the mean waiting time in line is less than 4.9 minutes. A random sample of 60 customers yield a sample mean of 4.8 minutes. From past studies it is know that the standard deviation is 0.6 minutes. At  = 0.05, test the fast food outlet’s claim a. Use the critical value z0 method from the normal distribution. (References: example 7 though 10 pages 385 – 388, end of section exercises 39 – 44 pages 392 – 393) (6 points) Answer: Given data 1. H0 : Ha : c 2.  = 3. Test statistics: 4. P-value or critical z0 or t0.: 5. Rejection Region: 6. Decision: 7. Interpretation:

## . CRA CDs, Inc., wants the mean lengths of the “cuts”

. CRA CDs, Inc., wants the mean lengths of the “cuts” on a CD to be 135 seconds (2 minutes and 15 seconds). This will allow the disk jockeys to have plenty of time for commercials within each 10-minute segment. Assume the distribution of the length of the cuts follows the normal distribution with a population standard deviation of 8 seconds. Suppose we select a sample of 16 cuts from various CDs sold by CRA CDs, Inc. a. What can we say about the shape of the distribution of the sample mean? b. What is the standard error of the mean? c. What percent of the sample means will be greater than 140 seconds? d. What percent of the sample means will be greater than 128 seconds? e. What percent of the sample means will be greater than 128 seconds but less than 140 seconds?

## 3. A man is on trial accused of murder in the

3. A man is on trial accused of murder in the first degree. The prosecutor presents evidence that he hopes will convince the jury to reject the hypothesis that the man is innocent. This situation can be modeled as a significance test with the following hypotheses: Ho: The defendant is innocent H1: The defendant is not innocent Suppose that the null hypothesis is rejected and alternate hypothesis is accepted. Discuss the conclusion as a Type I error, a Type II error, or a correct decision, if in fact the defendant is innocent.

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