5) Accounting data for sales showed that in randomly selected 15 stores thequantities of products sold are:509, 517, 502, 629, 830, 911, 847, 803, 727, 853, 757, 730, 774, 718, 904Unsatisfied with those results, a company decided to start advertisingcampaign. After the campaign finished, the number of products sold inthese same stores were:517, 508, 523, 730, 821, 940, 818, 821, 842, 842, 709, 688, 787, 780, 901Did the advertising campaign produce statistically significant results?

A hypothesis which is tested for plausible rejection is called the Null Hypothesis (typically…

Answered: 5) Accounting data for sales showed…

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 mayor running for re-election claims that during his term, average municipal taxes have fallen by $125. A conscientious statistician wants to test this claim. He surveys 37 of his neighbors and finds that their taxes decreased (in dollars) as follows: 121, 139, 121, 125, 118, 145, 141, 91, 127, 136, 144, 154, 131, 139, 139, 125, 108, 130, 125, 106, 137, 148, 154, 134, 137, 112, 96, 114, 114, 126, 133, 129, 94, 129, 148, 163, 121 The statistician assumes a population standard deviation of $19. Do you think the statistician should reject the mayor's claim? Why or why not? Step 1: State the hypothesis. ?v= Step 2: Determine the Features of the Distribution of Point Estimates Using the Central Limit Theorem. By the Central Limit Theorem, we know that the point estimates are [Select an answer with distribution mean and distribution standard deviation Step 3: Assuming the Claim is True, Find the Probability of Obtaining the Point Estimate. P? ✓ ? ♥ = P(? ? ♥
To count whale populations, the "capture" is done by means of a photograph, and the "tagging" is done by identifying each each captured whale through their unique individual pigmentation and markings. To estimate the population of gray whales in a region of the Pacific between Northern California and Southeast Alaska, 121 gray whales were "captured" and "tagged" in 2007. In 2008, 172 whales were "recaptured". Of these, 76 had been "tagged" in the 2007 survey. Based on these figures, estimate the population of gray whales in the region. There were approximately Answer gray whales in the region.
25.) 90% of all dogs have city licenses. If 7020 licenses have been issued, how many dogs are there in the city? 25.)
Here is a list of 27 scores on a Statistics midterm exam:20, 30, 31, 32, 46, 48, 49, 52, 54,20, 30, 31, 32, 46, 48, 49, 52, 54,59, 61, 69, 71, 73, 74, 79, 81, 81,59, 61, 69, 71, 73, 74, 79, 81, 81,81, 85, 86, 87, 88, 91, 94, 96, 9781, 85, 86, 87, 88, 91, 94, 96, 97Find Q3 = Find Q1 =
The five number summary for the populations of the 50 US states, in millions of people, is (0.506, 1.660, 4.170, 6.676, 35.842). The table shows all 50 populations listed in order. 0.506 0.621 0.636 0.658 0.771 0.830 0.927 1.080 1.262 1.299 1.315 1.395 1.748 1.813 1.903 2.333 2.421 2.734 2.750 2.901 2.953 3.499 3.524 3.591 4.142 4.198 4.507 4.525 4.602 5.097 5.504 5.561 5.740 5.760 5.893 6.207 6.227 6.407 7.481 8.540 8.685 8.918 10.104 11.450 12.394 12.712 17.385 19.281 22.472 35.842 How many people are in the smallest state? Calculate the IQR. Any state’s population that is more than Q3 + 1.5∗IQR is considered an outlier. Similarly, any population less than Q1 – 1.5∗IQR is an outlier. Determine whether there are any outliers, and, if so, identify them
Seven percent of those who invest in mutual funds consider corporate stocks to be “very safe”, 58% consider them “relatively safe”, 24% consider them “not very safe”, 4% consider them “not safe” and 7% "They are not safe at all." Business / Week / Harris asked 550 mutual fund investors how they would rate corporate bonds for safety. The answers were the following Seguridad Frecuencia Very safe 62 Relatively safe 323 Not very safe 76 Not safe 26 Not safe at all 63 Does the attitude of mutual fund investors differ from corporate bonds from their attitude to corporate stocks? Support your conclusion by giving a statistical test. Use α = 0.01. For this problem you must present: -Hypothesis-Result of the expected values, residuals and the calculation of the test statistic.-Analysis of the results in the chi square test and its conclusion in applied terms of the problem
A survey of enrollment at 35 community colleges across the United States yielded the following figures†. 6414; 1550; 2109; 9350; 21828; 4300; 5944; 5722; 2825; 2044; 5481; 5200; 5853; 2750; 10012; 6357; 27000; 9414; 7681; 3200; 17500; 9200; 7380; 18314; 6557; 13713; 17768; 7493; 2771; 2861; 1263; 7285; 28165; 5080; 11622 A school with an enrollment of 22,900 would be how many standard deviations away from the mean? (Round your answer to two decimal places.)
The number of cities with populations of 75,000 or more is depicted in the histogram. How many cities have between 100,000 and 499,999 people? A: 75,000-99,999 180- 160- 140- 120- * 100- 80- 60- 40- 20- 0- В: 100,000-199,999 C: 200,000-499,999 D: 500,000-999,999 E: 1 million or more A E Population of city ..... cities have a population between 100,000 and 499,999 people. (Type a whole number.) Number cities
A mayor running for re-election claims that during his term, average municipal taxes have fallen by $150. A conscientious statistician wants to test this claim. She surveys 45 of her neighbors and finds that their taxes decreased (in dollars) as follows: 149, 135, 147, 147, 160, 146, 165, 144, 142, 159, 138, 185, 143, 164, 143, 154, 163, 151, 171, 156, 133, 145, 180, 172, 166, 167, 149, 144, 154, 172, 138, 168, 179, 151, 131, 165, 114, 140, 162, 151, 136, 152, 157, 154, 136 The statistician assumes a population standard deviation of $13. Do you think the statistician should reject the mayor's claim? Why or why not? Step 1: State the hypothesis. ? Step 2: Determine the Features of the Distribution of Point Estimates Using the Central Limit Theorem. By the Central Limit Theorem, we know that the point estimates are [Select an answer distribution mean with and distribution standard deviation Step 3: Assuming the Claim is True, Find the Probability of Obtaining the Point Estimate. P? ✓ ? ✓…

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