AgesNumber of students15-18619-22623-26227-30231-34935-3810Based on the frequency distribution above, find the cumulative frequency for the class 31-34. (Yourtotal should include the frequency for this class.)Cumulative Frequency =Give your answer rounded to one decimalplace

Given Ages Number of student 15-18 6 19-22 6 23-26 2 27-30 2 31-34 9 35-38 10

Answered: Ages Number of students 15-18 6 19-22 6…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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.59. Potatoes. A high-quality product is one that is consistent and has very little variability in its characteristics. Controlling variability can be more difficult with agricultural products than with those that are manufactured. The following table gives the weights, in ounces, of the 25 potatoes sold in a 10-pound bag. (a) Summarize the data graphically and numerically. Give reasons for the methods you chose to use in your summaries. (b) Do you think that your numerical summaries do an effective job of describing these data? Why or why not? (c) There appear to be two distinct clusters of weights for these potatoes. Divide the sample into two subsamples based on the clustering. Give the mean and standard deviation for each subsample. Do you think that this way of summarizing these data is better than a numerical summary that uses all the data as a single sample? Give a reason for your answer.
The age of children in kindergarten on the first day of school is uniformly distributed between 4.88 and 5.94 years old. A first time kindergarten child is selected at random. Round answers to 4 decimal places if possible. If such a child is at the 87th percentile, how old is that child? ____ years old.
Using 68-95-99.7% rule to indicate quantities In a study of facial behavior, people in the control group are timed for eye contact in a 5-minute period. Their times are normally distributed with a mean of 183.0 seconds and a standard of 55.0 seconds. What percent of times will between 73 and 293 seconds? what percent of times will be over 238 seconds? Suppose that 800 people were assigned to this control group. How many people will be with time over 238?
Simple random sampling uses a sample of size n from a populaiton of size N to obtain data that can be used to make inferences about the characteristics of a population. Suppose that, from a population of 50 bank accounts, we want to take a random sample of four accounts in order to learn about the population. how many different random samples of four accounts are possible? Show steps in Excel
Poisson approximation of binomial distribution..
Categorical and Frequency Distribution
statistic,time series
Incidence rate in the last influenza epidermic was found to be 50 per thousand (5) of the population exposed. What should be the size of a sample to find incidence rate in the current epidemic if allowable error is 0.005 and 0.01?
Using a chi square determine if there is an association between the smoking status of mothers and colic among infants. Show all steps in the statistical procedure and provide the p-value for the test statistic Let α = 0.05.
Sampling distribution of difference between two means is normally distributed.
Range Rule of Thumb Use the results from Exercise 1 “Statistics” with the range rule of thumb to find arrival times separating those that are significantly low and those that are significantly high. Is the arrival delay time of 103 min significantly high?
The Poisson distribution gives the probability for the number of occurrences for a "rare" event. Now, let x be a random variable that represents the waiting time between rare events. Using some mathematics, it can be shown that x has an exponential distribution. Let x > 0 be a random variable and let ? > 0 be a constant. Then y = 1/B e^-x/b is a curve representing the exponential distribution. Areas under this curve give us exponential (refer to screenshot) (a) less than 20 days (i.e., 0 ≤ x < 20) (Round your answer to four decimal places.) (b) more than 50 days (i.e., 50 < x < ∞) Hint: e−∞ = 0 (Round your answer to four decimal places.) (c) between 30 and 70 days (Round your answer to four decimal places.)

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Ages Number of students 15-18 6 19-22 6 23-26 2 27-30 2 31-34 9 35-38 10 Based on the frequency distribution above, find the cumulative frequency for the class 31-34. (Your total should include the frequency for this class.) Cumulative Frequency = Give your answer rounded to one decimal place