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Normal Distribution
THIS IS ONE SINGLE QUESTION WITH 2 STEPS. PLEASE, PLEASE HELP! I DON'T UNDERSTAND THIS ONE.
Exam scores in a MATH 1030 class is approximately normally distributed with mean 86 and standard deviation 6. Round answers to the nearest tenth of a percent.
a) What percentage of scores will be less than 88? %
b) What percentage of scores will be more than 81? %
c) What percentage of scores will be between 80 and 87?%
Newgroveton is a community of 445,000. In the most recent year, there were 750 new cases of disease A in the community.
a. What is the area between 415 pounds and the mean? b. What is the area between the mean and 395 pounds? c. What is the probability of selecting a value at random and discovering that it has a value of less than 395 pounds?
Around the 5th century B.C.E., there was a massive explosion of philosophic writing in a variety of settings. These writings were influenced by political and social challenges, and they in turn influenced culture. In this assignment, you will crea..
In a random sample of n = 500 adults, 300 individuals say that they believe in love at first sight.- Calculate the value of P^ = sample proportion that believes in love at first sight.
Find out the probability that a randomly picked student has scored 105 or above, what is the z-value that you should look up on the normal distribution table?
Discuss a hospitals total maintenance costs, and use regression analysis to estimate the fixed cost element of maintenance and the variable cost associated with the number of patient-days.
Voters Voter registration records show that 41% of voters in a state are registered as Democrats. To test a random digit dialing device, you use it to call 250.
Find the 95% confidence interval for the experience of a new individual (from the same population from which the data were drawn) who is 50 years old.
For a sample of 20 stations last Tuesday the correlation was .78. At the .01 significance level is the correlation in the population greater than 0? t= .78-20.00/.01SQRT 20=?
A pair of dice is rolled. The sum of the faces on top is observed. What are the expectation, variance, and standard deviation of the observed sum? The Expectation and Variance Template attached to the main posting is optional and recommended.
These two questions related to Basic Statistics. The first question discuss about increasing scores and correlation widely spreading out
a what is the interpretation of the intercept in regressions 1 and 2? is the intercept meaningful?b please
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