Salaries for teachers in a particular elementary school district are normally distributed with a mean of $41,000 and a standarddeviation of $6,200. We randomly survey ten teachers from that district.O Part (a)In words, define the random variable X.O the salary of an elementary school teacher in the districtO the number of teachers in the districtO the number of teachers in an elementary school in the districtO the number of elementary schools in the districtO Part (b)O Part (c)O Part (d)Give the distribution of EX. (Round your answers to two decimal places.)EX - NV410006200O Part (e)Find the probability that the teachers earntotal of over $400,000. (Round your answer to four decimal places.)O Part (f)Find the 90th percentile for an individual teacher's salary. (Round your answer to the nearest whole number.)O Part (g)Find the 90th percentile for the sum of ten teachers' salary. (Round your answer to the nearest whole number.)O Part (h)If we surveyed 70 teachers instead of ten, graphically, how would that change the distribution in part (d)?O The distribution would shift to the right.O The distribution would become an exponential curve.O The distribution would shift to the left.The distribution would not change.O The distribution would be a more symmetrical normal curve.O Part (i)If each of the 70 teachers received a $3000 raise, graphically, how would that change the distribution in part (b)?O The distribution would shift to the right.O The distribution would take a wider shape.O The distribution would shift to the left.O The distribution would take a more narrow shape.O The distribution would not change.

Mean μ=41000, standard deviations σ=6200, n=10 Note: According to Bartleby guidelines expert solve…

Answered: deviation of $6,200. We randomly survey…

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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Evaluation 1. Samples of size n were randomly selected from the population with means and variances given below. In each case, find the mean, variance, and the variance of the sampling distribution of the means. a. n = 49; μ = 25; o² = 6.25 b. n = 55; μ = 10; o² = 9 2. A random sample of n = 100 measurements is obtained from a population with μ = 55 and o = 20. Describe the sampling distribution of means by computing the (a) mean of the sampling distribution of means μ, (b) variance of the sampling distribution of means o, and the (c) standard deviation of the sampling distribution of means o.
Using inferential statistics, the goal is usually to generalize from a to a population; sample DV; IV data; variable sample; population
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? QUESTION At the distribution hub of a major grocery store chain, a large shipment of honeydew melons has arrived.A worker chooses a random sample of 8 of the melons and records their weights (in kg) as shown below. 2.4, 3.4, 3.0, 3.6, 1.3, 3.2, 3.7, 3.5 Send data to calculator (a) Graph the normal quantile plot for the data. To help get the points on this plot, enter the data into the table in the correct order for a normal quantile plot: Then select "Compute" to see the corresponding area and z-score for each data value. Index Data value Area Z-Score 1 3 4 5 7. Compute (h) Looking at the normal quantile nlot. describe the nattern to the plotted noints. Choose the hest answer Start O 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center arch G ALEKS - Britney Fri. PIISC Insert F10 F12 6. 7 3 Y R K H. D F B C Alt Ctrl Hom OO O O OO
The distribution is skewed right. The spread of the distribution is from 1 to 5. The distribution is symmetrical. The distribution is skewed left.
A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 45.0 and 55.0 minutes. Find the probability that a given class period runs between 51.25 and 51.75 minutes. Find the probability of selecting a class that runs between 51.25 and 51.75 minutes. (Round to three decimal places as needed.)
both
pls answer C
IH a lårge population of fish, the proportion of angel fish is Let P be the random variable that represents the sample proportion of angel fish for samples of size n drawn from the population. Find the smallest integer value of n such that the standard deviation of P is less than or equal to 100
K A study was done on proctored and nonproctored tests. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal A. Ho H1 H2 H₁ H₁ H₂ ỌC. Hồ Hi-12 H₁: Hy > H₂ 0 в. Но 141=12 H₁ H₁ H₂ O D. Ho 11 #₂2 H₁ H1 H₂ The test statistic, t, is (Round to two decimal places as needed) The P-value is (Round to three decimal places as needed.) State the conclusion for the test. Proctored Nonproctored H 144 n 34 CIXS 77.58 11.08 12 31 81.91 21.24 A. Reject Ho There is sufficient evidence to support the claim that students taking nonproctored tests get a higher mean score than those taking proctored tests. OB. Fail to reject Ho. There is sufficient evidence to support the claim that students taking nonproctored tests get a higher mean score than those taking proctored tests. C. Fail to reject Ho. There is not sufficient evidence to support the…
7th
Find the mean and standard deviation for household size (use 7 for "7 or more") value for the random variable the percentages must be converted to decimals for this calculation

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