Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Like many behaviours, the proportion of drivers who use seat belts varies with factors such as age, sex, ethnicity and local laws. As part of a broader study, investigators observed a random sample of 117 female, Hispanic drivers in Boston; of these, 68 used their seat belts. What is the proportion of seat belt users in this sample? What is the proportion of non-users? Show that calculation of confidence intervals (CI) is legitimate for this sample (i.e. that use of the Normal approximation to the binomial is safe) then calculate the 95% and 99% CIs for the proportion of all female Hispanic drivers in Boston who wear seatbelts. Why is the 99% CI wider than the 95% CI?
For the experiment above, let X denote the number of hearts that are drawn. For this random variable, find its expected value and standard deviation.
Solution utilizing graphical method. Compute the following linear programming problem. Among which of the following points (X, Y) is not a feasible corner point.
In a sample of 20 men, the mean height was 178 cm. In a sample of 30 women, the mean height was 164 cm. What was the mean height for both groups put together?
Can we reject the hypotesis that the birthays are equally during each season of the year? use the 0.10 level of significance
At the .05 level of significance, is there convincing evidence that the number of absences per employee has increased?
Could this information be viewed as representing the ratio scale of measurement? If so , explain why. If not, why not.
Consider the following statement and discuss its implications. 'It is possible for a statistically significant result to be of no particular practical significance, depending on the context of the analysis.'
The 30 members of an orchestra were asked how many instruments each could play. The results are set out in the frequency distribution. Calculate the mean number of instruments played:
Conceptually we would expect the probability of newborn males and females to be the same. However, census reports indicate that the ratios of males and females in various countries do not conform to the theoretical prediction.
There a flu epidemic that is spreading across SF County. You are a principle and are in charge of 32 teachers. You want to plan ahead and be able to estimate how many substitute teachers the school may need during this epidemic.
Is spine bone density is normally distributed in young women with a mean of 1.0 g/cm 2 and a standard deviation of .10 g/cm 2 , then how many young women out of 100 would you expect to have bone densities less than .85 g/cm 2 ?
A geologist you spoke with is concerned about the rate of land erosion around the base of a dam. Another geologist is studying the magma activity within the earth in an area of New Zealand known for its volcanic activity.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd