The histogram below shows the distribution of annual growth rate in travel spending for 52 companies in the United States. Frequency 20+ 15 10 5 2 0+ 2 0 6 3 11 19 4 1 Annual Growth Rate (%) After creating this graph, it was discovered that the values for the companies with the 20 largest reported annual growth rates were miscalculated. In fact, each of these top 20 companies should have a higher value of annual growth rate than was previously reported. Which of the following statements must be true? (A) If you were to make a graph with the corrected values, the graph would be skewed to the left. (B) If you were to make a graph with the corrected values, the graph would be symmetric. (C) If you were to calculate the median with the corrected values, the new median would be greater than the old median. (D) If you were to calculate the interquartile range (IQR) with the corrected values, the new IQR would be the same as the old IQR. (E) If you were to find the value of the third quartile (Q3) with the corrected values, the new Q3 would be greater than the old Q3.

What does the slope of the trend line represent?

Define relative efficiency?

mex PLC has gathered following information on the sales of face mask from April 2020 to september 2020. Month Sales ($) April 17,000 May 18,000 June 19,500 July 22,000 August 21,000 September 23,000 You are required to3; a. Using linear trend equation forecast the sales of face masks for October 2020.

Calculate trend values by the method of least square from the data given below and estimate the sales for 1983 : Year 1976 1977 1978 1979 1980 : Sales of Co. ('000,000) : 70 74 80 86 90

Twins Twins are often born after a pregnancy that lastsless than 9 months. On the next page is a graph from theJournal of the American Medical Association (JAMA)showing the rate of preterm twin births in the United States over the past 20 years. In this study, JAMA catego-rized mothers by the level of prenatal medical care they received: inadequate, adequate, or intensive.a) Describe the overall trend in preterm twin births. b) Describe any differences you see in this trend, depend-ing on the level of prenatal medical care the mother received.c) Should expectant mothers be advised to cut back onthe level of medical care they seek in the hope ofavoiding preterm births? Explain.a) Create a linear model and predict the number ofgallons that will be available in 2005.b) The exam then asked students to estimate the yearwhen leaded gasoline will first become unavailable,expecting them to use the model from part a to answerthe question. Explain why that method is incorrect.c) Create a model…

Q1) Below are the given figures of production of boilers: Year Production 2014 80 2015 2016 90 92 2017 83 2018 94 2019 99 2020 92 Fit a straight-line trend. Also, plot these figures on a graph (no need of graph paper) to show the trend line.

During periods when the unadjusted federal minimum wage is constant, identify the trend that you observe in the adjusted federal minimum wage and the explain why that trend occurs

One study found a positive correlation between years of education and yearly income. Which fact would lead you to believe that the relationship between years of education and yearly income is one of causation and not correlation?

B4. A company has collected and smoothened its historcal yearly sales data of a product from 2015 up to 2021. The following table shows the sales and moving average figures. Year Sales Three-year moving average Five-ycar moving average (S thousands) 2015 2016 326.0 324.0 E 367.4 2017 344.0 2018 383.0 371.0 E 2019 389.0 2020 398.0 D. 2021 428.0 Calculate the missing values of 4, B, C, D, E and F(Correct to I decimal place).