Last week, a political campaign aired a new TV ad promoting its candidate. Thead was aired a different number of times depending on the region. To decide howmany times to air the ad next week, the campaign manager looked at the impactthe ad had made in the different regions.She tracked the number of times the ad had run in each region, x, and theincrease of the candidate's approval rating in those regions, y.Ads run Approval rating increase6209.6121814101819Round your answer to the nearest thousandth.

Given information: Ads run(x) Approval rating increase(y) 6 20 9 6 12 18 14 10 18 19…

Answered: Last week, a political campaign aired a…

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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↑ A survey was conducted by a website on which online music channels subscribers use on a regular basis. The following information summarizes the answers. 11 listened to rap, heavy metal, and alternative rock. 18 listened to rap and heavy metal. 20 listened to heavy metal and alternative rock. 16 listened to rap and alternative rock. 25 listened to rap. 40 listened to heavy metal. 31 listened to alternative rock. 20 listened to none of these three channels. a. How many people were surveyed? b. How many people listened to either rap or alternative rock? c. How many listened to heavy metal only? a. How many people were surveyed?
ps15
If John for does a phone poll of 900 Americans and ask each the highest earned education degree(none, fed, bs diploma, associates degree, or bachelor degree earned What is the variable?
A marketing manager for a large cafeteria chain wished to investigate sales of coffee (i.e., sales is the variable she is trying to understand). Fourteen cafeterias that were similar in such respects as volume of business, type of clientele, and location were chosen for data collection. Data were collected on sales of coffee (in hundreds of gallons) and the number of coffee dispensers within the cafeteria. The results are shown below. Sales Number of Dispensers 631.9 1 628 1 692.5 2 688.4 2 747.4 3 773.3 3 791.4 4 803.4 4 838.7 5 879.6 5 881 6 841.1 6 860.6 7 883.8 7 Create a scatter plot and then fit a quadratic model to predict sales from the number of dispensers. If we define y to be sales (in hundreds of gallons) and x to be the number of dispensers, what is the correct quadratic model? Group of answer choices a. y=-6.397x2+92.85x+538.06 b. y=41.67x+614.829 c. y=0.022x-12.979 d. y=3.348x10-5x2-0.0292x+6.09 e. y=623.521x0.180
Of the patients in a hospital, 20% of those with, and 45% of those without myocardial infarction have had strokes. If 30% of the patients have had strokes, what portion of the patients have had myocardial infarction? Answer: |
In 2016 the Better Business Bureau settled 84% of complaints they received in the United States. Suppose you have been hired by the Better Business Bureau to investigate the complaints they received this year involving new car dealers. You plan to select a sample of new car dealer complaints to estimate the proportion of complaints the Better Business Bureau is able to settle. Assume the population proportion of complaints settled for new car dealers is 0.84, the same as the overall proportion of complaints settled in 2016. Use the z-table. a. Suppose you select a sample of 200 complaints involving new car dealers. Show the sampling distribution of p. E(p) (to 2 decimals) (to 4 decimals) b. Based upon a sample of 200 complaints, what is the probability that the sample proportion will be within 0.04 of the population proportion (to 4 decimals)? probability : = c. Suppose you select a sample of 460 complaints involving new car dealers. Show the sampling distribution of p. E(F) (to 2…
A researcher hypothesized that cytokinins and auxins supplied by tumor-inducing insects lead to the production of tumors in plants. She performed experiments in which she hypodermically injected green pepper plants to determine if she could induce tumors. In one experiment she varied the concentration of cytokinin and the ratio of auxin concentration to cytokinin concentration. She used 3 concentrations of cytokinin and 6 ratios of auxin/cytokinin. The concentrations are indexed (1-3) with 3 indicating the highest concentration of cytokinin. The 6 ratios of auxin/cytokinin varied from 0.125 to 5.0 with values greater than 1 indicating that auxin was in greater concentration than cytokinin. The resulting data are in the date file "auxcyt.csv". The measured sizes of the tumors induced (relative to controls) are given in the 3rd column ('sumdiffd'). Analyze these data testing the appropriate hypotheses and interpret the results. (Note the unequal sample sizes.) auxcyt data…
I can't understand why the data is the percentage of surveyed parents.
County officials administered a drug use survey to all junior high students in September. The officials then selected the junior high school with the highest drug usage based on this test to receive a drug education program; the other junior high schools were to be used as comparisons. The officials administered the same survey to all junior high students in June. First, draw the design, using Xs and Os.
The low temperatures in the Town of Rigby for 5 conservative days were -12, -17,-11,-12,-18 what was the mean low temperature for five days
A school superintendent wanted to know whether there were differences between the high schools in her district with regards to the proportion of students who do not live with their biological parents. She surveyed 200 students from each of the two high schools – East and West. The proportion of students from the survey at East who do not live with their biological parents is 3.4%. The proportion of students from the survey at East who do not live with their biological parents is 4.2%. Using a 95% confidence interval (2SD or Theory based), can the superintendent conclude that there is a difference between East and West with respect to the proportion of students who do not live with their biological parents. Group of answer choices Yes she can conclude there is a difference because the confidence intervals overlap. No she cannot conclude there is a difference because the confidence intervals overlap. Yes she can conclude there is a difference because the confidence intervals don’t…
A sports psychologist wants to compare the running time for athletes vs non-athletes while running 1 mile. He collects data from 226 non-athletes and 166 athletes and analyzes it using SPSS.

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