2. Let Y1, Y2,.. , Y, be a random sample from N(0, 1), and let Y = E Y. Let Y6 be anotherindependent observation from the same population.a. What is the distribution of U = EY?? Explain using the concepts discussed in class.%3Db. What is the distribution of V = E(Y: – Ỹ)? Explain using the concepts discussed in class.c. What is the distribution of W = V6)Ya? Explain using the concepts discussed in class.

Given that Y1,Y2, . . ., Y5be a random sample from N0,1, and Y¯=15∑i=15Yi.

Answered: 2. Let Y1, Y2, Ys be a random sample…

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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Students in an introduction to statistics course were asked to describe their politics as "Liberal," "Moderate," or "Conservative." The results are shown in the table. Complete parts a through d below. Sex Female Male Total L 40 51 91 L % M 37 41 78 a) Find the conditional distribution (percentages) of political views for the females. L C 10 21 31 M % Total 87 113 200 Females % (Round to one decimal place as needed.) b) Find the conditional distribution (percentages) of political views for the males. C % D C % M % Males (Round to one decimal place as needed.) c) Make a graphical display that compares the two distributions. Choose the correct display below.
6. A distribution of a variable X has the following characteristics: 1%: 0 25%: 0 50%: 0 75%: 4.75 99%: 11.25 Which of the following best describes the distribution of X? A.) Left-skewed B. Symmetric C. Right-skewed D. Uncertain
Let assume that x ̅ ~ N (50, 2) and x ~ N (50, 20), what is the sample size? Assume that x represents some population. A. 100 B. 20 C. 200 D. 50
11. Thomas is studying the relationship between fitness and emotional well-being in children. One of his DVs is each child's weight. For his population of interest, u=85 (in pounds) and o = 8. Suppose Thomas repeatedly takes random samples of 225 children from this population, and for each sample he calculates the mean. А. What will be the shape of the distribution of sample means? a. positively skewed b. negatively skewed c. normal d. it's impossible to tell without knowing the shape of the original population distribution В. What will be the mean of the distribution of sample means? C. What will be the standard error of the distribution of sample means? D. Suppose Thomas increased the sample size from 225 to 300. What would happen to the standard error? a. it would increase b. it would decrease c. it would stay the same d. it's impossible to tell without knowing the shape of the original population distribution
A teacher predicts what the distribution of grades on the final exam will be and they are recorded in the table below. Grade Proportion A 0.25 B 0.30 C 0.35 D 0.10 The actual distribution for a class of 20 is in the table below. Grade Frequency A 7 B 7 C 5 D 1 State the null and alternative hypotheses. H0: The distribution of frequency for each grade is the same.Ha: The distribution of frequency for each grade is not the same. H0: The observed class grades do not fit the expected grades.Ha: The observed class grades fit the expected grades. H0: The observed class grades fit the expected grades.Ha: The observed class grades do not fit the expected grades. H0: The distribution of frequency for each grade is not the same.Ha: The distribution of frequency for each grade is the same.
After probability, part b is I also am asked to solve for “the mean of sampling distribution
In a study, it was found that 42.5% of the population drink soda at least once a day. You randomly select 8 people. Let X be the number of people in the sample that drink soda at least once a day.Then X has what distribution?
(Extra credit) 14. Let X denote the number of times a control machine malfunctions: 1, 2, 3 on any given day. Let Y denote the number of times a technician is called on an emergency call. The joint distribution of X and Y are:
Are phone calls equally likely to occur any day of the week? The day of the week for each of 420 randomly selected phone calls was observed. The results are displayed in the table below. Use an a = 0.05 significance level. a. Complete the rest of the table by filling in the expected frequencies: Frequencies of Phone Calls for Each Day of the Week Outcome Frequency Expected Frequency Sunday 61 Monday 70 Tuesday 69 Wednesday 50 Thursday 40 Friday 64 Saturday 66 b. What is the correct statistical test to use? Select an answer ✓ c. What are the null and alternative hypotheses? Ho: The distribution of phone calls is not uniform over the days of the week. Phone calls and days of the week are dependent. Phone calls and days of the week are independent. O The distribution of phone calls is uniform over the days of the week.
I need help with parts c-e
in "a" the blank is "z" and "t" distribution
NEED HELP WITH: E,F,G

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