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1) In a random sample of 50 students, the average income is found to be 6,500. The income is known to be normally distributed with population standard deviation 1000. Find the 95% confidence interval for the income of students. Round to the nearest hundredth.
2) In a random sample of 30 people, the mean height is 68.4 inches and the sample standard deviation is 4.2 inches. The population standard deviation is not known. Find the 95% confidence interval for the heights. Round to the nearest hundredth.
3) For a random sample of 50 students, it is found that 75% travel for spring break. Find the 95% confidence interval for the proportion of students who travel for spring break. Round to the nearest hundredth.
A part is produced with a mean of 6.2 ounces and a standard deviation of 0.2 ounce. What is the probability that the weight of 100 such items is between 6 l6 and 624 ounces?
A management recruiter wants to estimate a linear regression relationship between an executive's experience and the salary the executive may expect to earn after placement with an employer.- Is there a linear relationship between the experience and..
A sequence of n independent sample pH determinations will be made. Suppose each sample pH is a random variable with expected value m and standard deviation .1.
Approximate y(1) using Euler's method and step sizes of 0.2. Perform these calculations by hand. What is the exact value of y(1)?
Research shows that 14.3% of persons 20-25 years old and 59.9 % of persons 60-65 years old vote. What is the absolute increase from the younger group to the older group to the nearest point?
In a study to determine the performance of processing machines used to add raisins to trial-size "Raisin Bran" cereal boxes, (see Example 12.3 in Chapter 12), 6 sample boxes are taken at random from each machine's production line and the number ..
Many organizations adopt a targeted recruitment strategy. As an example, Home Depot, CVS, and Walmart have targeted older workers in their recruitment efforts. This includes advertising specifically in media outlets frequented by older individuals..
1. distinguish between classification and tabulation of data. what are the types of classification of data?2. calculate
The researcher then records the level of activity for each child during a 30 minute session on the playground. Is this an experimental or a correlation study? Explain your answer.
there are 20000 eligible voters in york county south carolina. a random sample of 500 york county voters revealed 350
(a) Show that the game is progressively bounded. (b) Find the sets N and P. (c) Describe the winning strategy.
perform the two anova tests. include the anova table and an explanation of your results. be sure to write full
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