is interested in comparing the mean sales revenue perA companysalesperson at two different locations. The manager takes a random sample of10 salespeople from each location independently and records the salesrevenue generated by each person during the last four weeks. He decides touse a t-test to compare the mean sales revenue at the two locations.Which of the following assumptions is necessary for the validity of the t-test? *The population of the sales records at each location is normally distributed.The population standard deviations at both locations are not equal.None of theseThe population of the difference in sales records computed by pairing onesalesperson from each location is normally distributed.The population standard deviations at both locations are known.The population standard deviations at both locations are equal.

It is given that the statements about to the assumptions is necessary for the validity of the…

Answered: Which of the following assumptions is…

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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The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days and a standard deviation of 17 days. In what range would you expect to find the middle 50% of most pregnancies? Between and If you were to draw samples of size 43 from this population, in what range would you expect to find the middle 50% of most averages for the lengths of pregnancies in the sample? Between and Enter your answers as numbers. Your answers should be accurate to 1 decimal places.
Which of the following statements are true? It is okay to use the median to estimate the mean since both are a measure of the center of a distribution. It is okay to use the standard deviation to estimate the IQR since both are measures of variability. Point estimates based on a sample are sometimes far from a parameter's value. i only ii only iii only i and ii i and iii i, ii, and iii
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The lengths of pregnancies in a small rural village are normally distributed with a mean of 270 days and a standard deviation of 13 days.In what range would you expect to find the middle 68% of most pregnancies?Between and If you were to draw samples of size 47 from this population, in what range would you expect to find the middle 68% of most averages for the lengths of pregnancies in the sample?Between and Enter your answers as numbers. Your answers should be accurate to 2 decimal places.
B. Simple Correlation The monthly income of a person (y) is related to the age of the person(x). Along with higher age of a person goes also higher monthly income. But while there is a positive correlation between age and income, we cannot say that age causes the income of a person. Further, we cannot say the income of a person depends on that person's age. Given the sample data below: (show your solutions) a. Solve for the correlation r b. Test the significance of r Case # Y (Income) in thousands (Age) in years 1 9. 28 18 44 3 20 62 4 12 32 15 27 6. 25 55 10 24 26 12 9. 17 35 10 16 37 Total 154 370
Guadalajara Tours' daily sightseeing trip has a capacity of 55 people. Each day, tour officials record the number of people making the trip. The data for a selection of 22 summer days are as follows. 31, 36, 41, 42, 43, 43, 46, 46, 46, 47, 47, 49, 51, 51, 51, 51, 52, 52, 52, 54, 54, 54 Send data to calculator Send data to Excel Frequency 10 10- 6- 4 30 35 40 45 50 55 Number of people on trip O Mean (a) For these data, which measures of central tendency take more than one value? Choose all that apply. O Median OMode ONone of these measures OMean (b) Suppose that the measurement 31 (the smallest measurement in the data set) were replaced by 15. Which measures of central tondonc uld bo offoctod hv the chan OMedian Mode Explanation Check O 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use Privacy Acce O Type here to search 99+ 88 4. 2.
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help me answer all of thew questions in the pictures it is all one big question
In the US, 46.2% of all people have type O blood, 39.1% have type A blood, 10.4% have type B blood and 4.3% have type AB blood. A researcher wants to see if the distribution of blood type is different for millionaires. The table below shows the results of a random sample of 3116 millionaires. What can be concluded at the a = 0.01 significance level? a. Complete the table by filling in the expected frequencies. Round to the nearest whole number: Frequencies of Blood Type Outcome Frequency Expected Frequency 1434 A 1224 В 310 AB 148 b. What is the correct statistical test to use? Select an answer V c. What are the null and alternative hypotheses? Но: O Blood type and income are independent. O The distribution of blood type for millionaires is not the same as it is for Americans in general. O The distribution of blood type for millionaires is the same as it is for Americans in general. O Blood type and income are dependent.
The lengths of pregnancies in a small rural village are normally distributed with a mean of 265 days and a standard deviation of 16 days. In what range would you expect to find the middle 95% of most pregnancies? Between and If you were to draw samples of size 59 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? Between and Enter your answers as numbers. Your answers should be accurate to 1 decimal places. Question Help: Message instructor Submit Question 824 tv esc 20 888 F1 F2 F3 F4 F5 F6 @ # $ % & 1 2 4 Q W Y T
Which of the following statements is not true? There is only one median for each variable. One definition of the median states that, for an odd number of observations, the median is the middle score when scores are placed in order of magnitude. Another term for the median is 50th percentile. The median is generally more sensitive to (i.e., affected by) the presence of a few extreme observations than is the mean.
Big Blossom Greenhouse was commissioned to develop an extra large rose for the Rose Bowl Parade. A random sample of blossoms from Hybrid A bushes yielded the following diameters (in inches) for mature peak blooms. 2 in, 3 in, 3 in, 8 in, 10 in, 10 in

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