A lunch bar has an average sales amount of $8.51. Themanager initiates staff training to try to get them to sellmore extras (chips, drinks etc), and after this training, asample of 54 customers had the following samplestatistics: top enclose x space equals space9.21 and s== 2.37 Assume our question of interest is: "is theresignificant evidence that the mean amount spent bycustomers has increased?" Calculate the observed valueof the test statistic (correct to 2dp).

Calculate for the observed value of money test statistic Let:t = test statistic Formula:t =…

Answered: A lunch bar has an average sales amount…

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 consumer research group purchased identical items in eight drugstores. The mean cost for the purchased items was $113.49. The mode was $112. Using the empirical relationship among mean, median, and mode, estimate the median and comment on the skewness of the distribution.
It is known that average house prices today is $371,040 higher compared to 10 years ago and median in the current time also $382,000 higher than house prices 10 years ago. Provide an interpretation of the change of mean and median based on the information above. Compare and contrast these values and comment on the distribution of the increases in house prices.
What is the relationship between a person's income and their level of education, and how can this be measured using statistical methods?
Please see below for the question details. I got 34.32 for the interest, but I also got 19.68 and 32 when I reworked the problem; Please help!!!! Because of the relatively high interest rates, most consumers attempt to pay off their credit card bills promptly. However, this is not always possible. An analysis of the amount of interest paid monthly by a bank's Visa cardholders reveals that the amount is normally distributed with a mean of 27 dollars and a standard deviation of 8 dollars.Please use z-scores with at least 3 decimal places. D. What interest payment is exceeded by only 18% of the bank's Visa cardholders? Interest Payment =
a consumer product magazine recently ran a story concerning the increasing prices of digital cameras. the story stated that digital camera prices dipped a couple of years ago, but are now beginning to increase in price because of added features. according to the story, the average price of all digital cameras a couple of years ago was $215.00. a random sample of cameras was recently taken and entered into a spreadsheet. it was desired to test to determine if that average price of all digital cameras is now more than $215.00. what null and alternative hypothesis should be tested?
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Bottles for room spray are supposed to weigh exactly 16 oz. Inspectors want to develop process control charts. They take six boxes of five bottles each and weigh them. They obtain the following data. The mean weights of each of the 6 samples are 15.69, 13.69, 15.53, 16.80, 12.31, and 13.75, respectively. Likewise, the range values for the each of 6 samples are 1.78, 0.64, 0.55, 0.38,0.21, and 0.90 respectively. Find out Grand Mean (X double bar), and mean range (R bar) O a. 14.63, 0.74 O b. 14.81, -0.74 O c. 15.53, 0.67 O d. 0,0 e. 16.53, 0.86
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Bottles for room spray are supposed to weigh exactly 16 oz. Inspectors want to develop process control charts. They take six boxes of five bottles each and weigh them. They obtain the following data. The mean weights of each of the 6 samples are 15.43, 14.47, 18.07, 17.34, 12.74, and 15.58 respectively. Likewise, the range values for the each of 6 samples are 1.63,0.66, 0.47,0.40, 0.20, and 0.90 respectively. Find out Grand Mean (X double bar), and mean range (R bar) O a. 16.538, 0.86 O b. 15.61,0.71 16.53,0.71 O d. 15.82, -0.65 O e. 0,0
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To determine if their 1.50 inch steel handles are properly adjusted, Smith & Johnson Industries has decided to use an X-Chart which uses the range to estimate the variability in the sample. Step 1 of 7: What is the Center Line of the control chart? Round your answer to three decimal places. Table Period 1 2 Control Chart AnswerHow Select the Copy Table button to copy all values. To select an entire row or column, either click on the row or column header or use the Shi and arrow keys. To find the average of the selected cells, select the Average Values button. Copy Table 456789 Sample Mean Sample Range obs1 obs2 obs3 obs4 obs5 obs6 1.46 1.50 1.46 1.53 1.55 1.54 1.5067 1.54 1.45 1.49 1.4983 1.53 1.46 1.52 1.45 1.47 3 1.50 1.54 1.47 1.51 1.4900 1.53 1.47 1.50 1.53 1.5067 1.46 1.45 1.49 1.4850 1.51 1.5117 1.49 1.52 1.54 1.50 1.46 1.54 1.53 1.46 1.51 1.52 1.49 1.46 1.50 1.47 1.47 1.53 1.53 1.50 1.47 1.52 1.45 1.51 1.52 1.54 1.54 1.50 1.5050 1.5067 1.55 1.49 1.54 1.5083 1.51 1.54 1.5050 1.49…

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