distribution. Forty samples of n=25 people were taken from this population for non-refundable draws. Find the arithmetic mean and variance of the distribution of the sample means O a) 86 and 4.41 O B) 75 and 1,181 OC) 65 and 1.62 OD) 56 and 2.88 O TO) 70 and2.31

distribution. Forty samples of n=25 people were taken from this population for non-refundable draws. Find the arithmetic mean and variance of the distribution of the sample means O a) 86 and 4.41 O B) 75 and 1,181 OC) 65 and 1.62 OD) 56 and 2.88 O TO) 70 and2.31

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Q According to a recent article about individuals who have credit cards, the mean number of cards per person with credit cards is 4. To test this result a random survey of 60 individuals who have credit cards was conducted. The survey only includes the number of credit cards per participant. The results of the survey are attached below. (a) What is the variable of interest in this study? Is it qualitative or quantitative? (b) Do the results of the survey imply that the mean number of cards per individual is less than 4? Use the a= 0.05 level of significance. Click the icon to view the data from the survey. C (a) What is the variable of interest in this study? Is it qualitative or quantitative? The variable of interest is It is a ▼variable. D Clear all Check answer Help me solve this View an example Get more help. 5:42 PM 6/18/2022 E Type here to search 3 7 S X E D C "42 $ R F % 5 T G 40 6 B Y H N C N 8 J M 9 K P 97°F Mostly sunny delete prt sc end 7 1
Find the median.
s Consider A random sample of 150 in size is taken from a population with a mean of 1640and unknown variance. The sample variance was found out to be 140. a. Find the point estimate of the population variance b. Find the mean of the sampling distribution of the sample mean
1. 2. 4. 1. 2. The distribution of a sample of 100 test scores is mound-shaped and symmetrical, with a mean of 50 and a variance of 144. 3. a) b) c) 4. d) 3. a) a) A sample of 200 people were given a test. The distribution of the test scores was mound- shaped and symmetrical with a mean of 100. One person, whose test score was 125, was found to be at the 84th percentile. b) d) Answers: b) Approximately how many scores are equal to or greater than 74? What score corresponds to the 75th percentile? If the lowest and highest scores in this sample are 14 and 89, respectively, what is the range of the scores in standard deviation units? b) Assume that the 100 test scores still have a mean of 50 and a variance of 144, but now have a strongly negatively skewed distribution. At least how many of the scores fall between 32 and 68 in this distribution? What is the Z-score of a person whose test score is 70? Approximately how many people obtained scores greater than 135? Approximately how many…
4. The ages of six junior champion chess players are 16, 11, 8, 13, 7, and 11. Using the deviation-score method(i.e., the definitional formula used in class), find:a) the range of the ages.b) the variance of the ages.c) the standard deviation of the ages 5. Add the extreme score of 4 to the ages from #4 and recompute:a) The range of the ages.b) The variance of the ages.c) The standard deviation of the ages.d) Compare the ranges and standard deviations from #4 and #5. What generalization is illustrated bycomparing these answers?
. You collected 10 years of daily data. Based on that you find first trading day of each month 's average return is 50 bps. Mean return for all days is 4 bps. Stdev across all days is 100 bps. Stdev for first day of each month only is 125 bps. Q3a. What is the mean return for trading days other than first day of the month? Q3b. Take the difference in sample mean for first day vs. other days. This is your point estimate for the difference b/w two types of days. What is that point estimate? What is stdev for the point estimate? Q3c. What is the probability of observing the point estimate above under the null hypothesis that the true difference is zero (this is known as p-value)? Q3d. What is the 95% Confidence interval for the point estimate? At 95% confidence, should you reject or accept that first days’ mean return is not different from other days of the month?
Q1. Draw all possible samples each of size 2 from the population 12, 6, 24, 30, 18 using sampling with and without replacement. Show that the mean of all sample means is equal to population mean and variance.
Q.6. The median of the following incomplete frequency distribution is 4, what is the frequency of 8? X 1 3 4 6. 7 8 F 3 4 4 3 2
b) The Mean Deviation (M.D) for the following homogeneous data (16, 15, 17, :12, 18, 10, 9, 35) is 3.204 O 3.125 O 5.125 5.204 O none of all above O
Q4. The number of books checked out from the library from 9 students are as follows: 0, 1; 2; 3; 4; 4; 8; 10; 11Find the arithmetic mean, Geometric mean and Harmonic mean.Can we calculate the all the averages for the above data, if not why not?
If the variance is 64, then what will be the value of o? O a. 4096 O b. 128 Oc.8 O d. 32
Greg actually has a GPA of 4.60 What is the residual score? A) 2.59 B) -4.06 C) -3.06 D) 1.42 How much of the variance in GPA can be explained by the variance in social contacts? A) 20.00% B) 40.00% C) 16.00% D) 63.24% What is the standard error of the estimate? A) 2.23 B) 3.35 C) 2.43 D) 3.07