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Students at a major university in Southern California are complaining about a serious housing crunch. Many of the university's students, they complain, have to commute too far to school because there is not enough housing near campus. The university officials' response is to perform a study. The study, reported in the school newspaper, contains the following histogram summarizing the commute distances for a sample of 100 students at the university:
commute distance in miles: Frequency:
0-4 26
4-8 26
8-12 19
12-16 13
16-20 11
20-24 5
Based on the histogram, find the proportion of commute distances in the sample that are at least 16 miles. Write your answer as a decimal, and do not round your answer.
From her firm’s computer telephone log, an executive found that the mean length of 64 telephone calls during July was 4.48 minutes with a standard deviation of 5.87 minutes.
if two televisions are randomly selected, compute the probability that both televisions work. what is the probability that at least one does not work?
Suppose a major real estate development corporation has hired you to research the features of housing for which people will pay the most in making a home purchasing decision.
If all the other quantities remain the same, how does the indicated change affect the width of the confidence interval?
The life expectancy of Timely brand watches is normally distributed with a mean of four years and a standard deviation of eight months.
what do we mean when we say that a statistical result is significant? what is the difference between a statistically
in a survey of women in a certain country ages 20-29 the mean height was 64.5 inches with a standard deviation of 2.91
consider the type of clothes dryer gas or electric purchased by each of ve di erent customers at a certain store.a. if
Suppose we have a population with the mean of 100 and a standard deviation of 28.We take repeated samples of size 49 and calculate the mean of each sample to form a sampling distribution. Find the mean and standard deviation of the sampling distrib..
five students performed a kjeldahl nitrogen analysis of a protein sample. the following weight nitrogen values were
It has been observed that the number of particles emitted by a radioactive substance which reach a given portion of space during time t follows closely the Poisson distribution with parameter l. Calculate the probability that: i) No particles reach..
The sample mean difference was 0.41 and Sd was 0.387.
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