In a small town of 2535 people, 1859 consider themselves "conservative" on the political spectrum.What percentage of the town consider themselves "conservative"?Answer:%Next, we select a sample of 136 individuals from this town. Suppose we were to use a normal distribution toapproximate the number of "conservatives" in this sample.What is the mean and standard deviation of this distribution?Mean=Standard Deviation=Round all answers to two decimals.

Answered: Image /qna-images/answer/8f9e6324-8ba3-4fcd-b4d0-59ad7fc8c9dd.jpg

Answered: In a small town of 2535 people, 1859…

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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Which of the following is an example of doing inferential statistics? You calculate the average grade on an exam in a class of 5th grade math students to see if they did better or worse than last year. You lookup the median and the standard deviation of the age for the U.S. population from U.S. Census data. You use a sample of homes in Rancho Cucamonga to draw a conclusion about the mean home price for all Rancho Cucamonga homes. You compare the distributions of scores for two Social Science 10 classes to see which class did better on the exam.
In order to set rates, an insurance company is trying to estimate the number of sick days that full time workers at an auto repair shop take per year. A previous study indicated that the standard deviation was 3.3 days. How large a sample must be selected if the company wants to be 99% confident that the true mean differs from the sample mean by no more than 1 day? 73 157 90 52
The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days and a standard deviation of 15 days.In what range would you expect to find the middle 95% of most pregnancies? Round each answer to the nearest day. If you were to draw samples of size 52 from this population, in what range would you expect to find the middle 95% of most averages for the lengths of pregnancies in the sample? Round each answer to the nearest tenth of a day.
Ch 8 FRQ ( The distribution of average speeds of the top 53 drivers in NASCAR is roughly symmetric, unimodal, and bell-shaped, with a mean of 184.8 mph and a standard deviation of 7.2 mph. In the space above, draw a Normal Curve, from z=-3 to z=+3. Draw vertical lines at the mean and each whole number standard deviation above and below the mean. Write two rows of numbers under the base line; one row with the number of standard deviations above and below the mean (z-scores), and a row under that with the actual values for this problem. ] What percent of drivers would you expect to have speeds below 199.2 mph ? Show all work. s] What is the area under the curve to the left of a speed of 170.4mph Show all work. What is the probability that a driver selected at random will have a speed below 172.0 mph ? Show all work. B] What percent of drivers would you expect to have a speed above 177.0 mph ? Show all work. How many drivers would you expect to have speeds between 170.4 mph and 177.0 mph…
For the following situation, find the mean and standard deviation of the population. List all samples (with replacement) of the given size from that population and find the mean of each. Find the mean and standard deviation of the sampling distribution and compare them with the mean and standard deviation of the population. The word counts of five essays are 508, 634, 545, 611, and 577. Use a sample size of 2. O The mean of the population is 575 (Round to two decimal places as needed.) The standard deviation of the population is 45.10. (Round to two decimal places as needed.) Identify all samples of size 2 with the correct accompanying means below. O A. 508, 611, x = 559.5 O B. 634, 508, x = 571 OC. 611, 634, x = 622.5 O D. 577, 508, x = 542.5 O E. 611, 611, x = 611 OF. 508, 545, x = 526.5 OG. 545, 577, x = 561 O H. 577, 624, x = 600.5 O I. 545, 508, x = 526.5 J. 545, 634, x = 589.5 K. 577, 545, x = 561 O L. 634, 611, x = 622.5 O M. 577, 611, x= 594 O N. 611, 577, x = 594 O O. 611,…
Joey and Dee Dee bowled five games at the Rock 'n' Bowl Lanes. Their scores are given in the following table. Joey 143 170 219 157 146 Dee Dee 183 166 188 143 160 (a) Find the mean score of each bowler. (Round the answer to one decimal place.) Joey X = Dee Dee x = (b) Find the standard deviation of each bowler's scores. (Round the answer to one decimal place.) Joey S = Dee Dee s =
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Please show the steps to solve the problems 28 a, b, and c.
D Question 24 The weights of cats is Normally Distributed. The mean weight is 10 lbs with a standard deviation of 0.2 lbs. Draw the normal curve and fill in the cut scores and percentages. Then answer the questions below: Based on a sample of 600 cats, how many would you expect to weigh more than 10.4 lbs? Based on a sample of 600 cats, how many would you expect to weigh at least 9.8 lbs. but not more than 10.2 lbs? Based on a sample of 600 cats, how many would you expect to weigh more than 10 lbs?
The average income in a state was $64 comma 64,000 per person per year. Suppose the standard deviation is $29 comma 29,000 and the distribution is right-skewed. Suppose we take a random sample of 100 residents of the state. Complete parts (a) and (b) below. a. What value should we expect for the sample mean? Why? b. What is the standard error for the sample mean?
Question 2, a. & b
Question 3 Match the questions with answers. Use this sample data for all questions: Table 2: Time taken in seconds. Sample 290, 340, 150, 300, 200, 100, 400, 500, 600, 89, 94 What is the mean for table 2? A. 278.45 What is the median for table 2? B. no mode v What is the mode for table 2? C. 172.06 v What is the sample standard deviation for table2 ? D. -0.46 Calculate the 75th percentile for table 2. E. 622.58 v What is the interquartile range for table 2? F. 290.00 What is the z score for an x value of 200 using table 2? G. 0.46 v Using the empirical rule to find the range of values containing 95% of the data from table 2, what is the upper value of the range? Hint: use the mean and standard deviation you previously calculated. H. 794.64 I. 177.95 J. 400.00 K. 300.00 L. 198.38 M. 100 N. 370

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