Stat 2

The weight of adult male grizzly bears living in the wild in the continental United States is approximately normally distributed with a mean of 500 pounds in a standard deviation of 50 pounds the weight of adult female grizzly bears approximately normally distributed with a mean of 300 pounds and a standard deviation of 40 pounds approximately what would be the weight of a female grizzly bear with the same standardized Z score as a male grizzly bear with a weight of 530 pounds

324

The commuting time for student to travel from home to a college campus is normally distributed with a mean of 30 minutes and a standard deviation of five minutes if the student leaves home at 8:25 AM what is the probability that the student will arrive at the college campus later than 9 AM

0.16

A complex electronic device contains three components a BNC the probabilities of failure for each component in any one year or 0.010. 03 and 0.04 if anyone component fails the device for fail of the components feel independently of one another what is the probability that the device will not fail in one year

0.922

A random sample of 374 United States pennies was collected in the each of each Penny was determined according to the boxplot below what is the approximate interquartile range of the ages

16

History and below displays the frequencies of waiting times in minutes for 175 patients in a dentist office which of the following could be the median of the waiting times in minutes

7.25

The residual plot from five differently scores want your question wines or Sean below which of the plots provides the strongest evidence that it's regression line is an appropriate model for the data is consistent with the assumption is required for inference for regression

Evenly dispersed

The histogram above shows the number of minutes needed by 45 students to finish playing a computer game which of the following statements is correct

Skewed to left

For roll a fair die each of the outcomes 12345 or six is equally likely read Dina green dye Road simultaneously the difference of the outcomes red to green is computed. This is repeated for a total of 500 rolls of the pair of day which of the following graphs best represents the most reasonable distribution of the differences

Symmetric prominent median

Of the following.parts which represents a set of data that has the greatest standard deviation

Hole in middle

I company sells concrete in batches of 5 yd.³ the probability distribution of X the number of cubic yard sold in the single order for concrete from this company shown in the table below the expected value of the probability distribution of X is 19.25 and the center deviation is 5.76 there's a fixed cost to deliver the concrete The Profit why in dollars for to particular order can be described by Y equals 70 5X -100 what is the standard deviation of why

432

In the design of a survey which of the following best explains how to minimize response bias

Carefully word and field test survey questions

For sample of 42 rabbits the mean weight is 5 pounds in the center deviation of weights is 3 pounds which of the following is most likely true about the weights for the rabbit in the sample

Distribution of weight to skewed to the right because the least possible weight is within two standard deviation of the mean

Data we're collecting on the mountain dollars that individual customer spend on dinner and an Italian restaurant the courthouse first step that are given below which of the following statements must be true for these customers

Have spent less than or equal to $44.27 and half speed greater than or equal to $44.27

Local companies interested in supporting environmentally friendly initiative such as carpooling among employees and company surveyed all of the 200 employees at the downtown offices employees responded as to whether or not they own a car into the location of the home where they live results are shown in the table below which of the following statements about a randomly chosen person for that these 200 employees is true

If the person owns a car here she is more likely to look elsewhere in the city then to live in the downtown area in the city

The computer output below shows the results of a linear regression analysis for predicting the concentration of zinc in parts per million from the concentration of lead in parts per million found in fish from a certain river which of the following statements is a correct interpretation of the value 19.0 in the output

Increase in concentration of zinc

A nonprofit organization plans to hold a raffle to raise funds for top rations a total of 1000 raffle tickets will be sold for one dollar each after all the tickets are sold one ticket will be selected a random and its owner will receive $50 the expected value for the next game for each ticket is -$.95 what is the meaning of the expected value in this context

They to get owners lose an average of $.95 per raffle ticket