Data collected by a price reporting agency from more than 90,000 gasoline and convenience stores throughout the U.S. showed that the average price for a liter of unleadgasoline was $0.87. The following data show the price per liter ($) for a sample of 20 gasoline and convenience stores located in San Francisco.0.970.931.290.960.961.000.940.931.010.960.960.970.961.071.080.990.980.970.970.96(a) Use the sample data to estimate the mean price in dollars for a liter of unleaded gasoline in San Francisco. (Round your answer to three decimal places.)(b) Compute the sample standard deviation in dollars. (Round your answer to three decimal places.)%24%24

Introduction : Sample mean is said to be unbiased estimate of the population. Unbiased Estimator :…

Answered: Data collected by a price reporting…

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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3)The following table shows data for the price of gasolince (per gallon) in various gasstations in a city. Complete the frequency table and anwer the following questions?Round to the nearest tenth of a percent if necessary.Price of Gas FrequencyCumulativeFrequencyRelativeFrequency0.00-0.99 11.00-1.99 12 132.00-2.993.00-3.99 19 594.00-4.99 625.00-5.99 63a.) What percent of the stations have price of gasoline at least $3 per gal? Round to thenearest tenth of a percent if necessary.b.) Find the mean price of gasoline? Round to the nearest cent if necessary.
The following data are collected from pregnant women to compare the Plasma ascorbic acid level of smokers and non-smokers. Table: Plasma ascorbic acid values Non-smokers 0.97, 0.72, 1.00, 0.81, 0.62, 1.32, 1.14, 1.22, 0.90, 0.74, 0.88, 0.94 Smokers 0.88, 0.71, 0.98, 0.79, 1.01, 1.16, 0.78, 1.28 Test whether there is any difference between plasma ascorbic acid levels of smokers and non-smokers. Also find 95% confidence interval for the difference of two means. Describe your findings. Use alpha=0.05 [Hint: use hypothesis, test statistics confidence interval etc.]
1. Find the percentage of N.d. observations with a zz-score between z1= -3.04 and z2 = 2.85. Give your answer to two decimal places. 2. Find the proportion of N.d. observations with a zz-score between z1= -2.95 and z2 = 0.70. Give your answer to four decimal places.
Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate for the data below. Years in which U.S. presidents were inaugurated Choose the correct answer below. O A. The nominal level of measurement is most appropriate because the data cannot be ordered. OB. The ratio level of measurement is most appropriate because the data can be ordered, differences (obtained by subtraction) can be found and are meaningful, and there is a natural starting point. OC. The ordinal level of measurement is most appropriate because the data can be ordered, but differences (obtained by subtraction) cannot be found or are meaningless. OD. The interval level of measurement is most appropriate because the data can be ordered, differences can be found and are meaningful, and there is no natural starting zero point. DELL Nex
Answer the following statistic questions on house prices, use the information below as reference.
The top 14 speeds, in miles per hour, for professional drag racing over the past two decades are listed below. Find the median speed. 181.1 202.2 190.1 201.4 201.2 193.2 201.2 194.5 A. 196.1 B. 196.7 C. 201.2 D. 195.8 191.3 201.4 199.2 192.2 196.0 196.2
A consumer research company wants to estimate the average cost of an airline ticket for a round trip within the continental United States. A random sample of 50 airfares was gathered giving an average price of $438. Identify the variable. A. Random sample of 50 airfares C. Consumer research company B. Airline Fare D. Quantitative E. $38
Statistics Question
state health web site provides information on the cost-to-charge ratio (the percentage of billed charges that are actual costs to the hospital). The cost-to-charge ratios for both inpatient and outpatient care in 2002 for a sample of six hospitals of that state follow. (Use a statistical computer package to calculate the P-value. Use ?inpatient − ?outpatient. Round your test statistic to two decimal places and your P-value to three decimal places.) Hospital 2002InpatientRatio 2002OutpatientRatio 1 86 78 2 77 58 3 99 77 4 65 57 5 65 50 6 104 69 t = df = P-value = Is there sufficient evidence to suggest that the mean difference cost-to-charge ratio for the state's hospitals is lower for outpatient care than for inpatient care? Use a significance level of 0.05. Yes OR No
Is the question “Rate the quality of your medical care on a scale from 1 to 5” measuring nominal, ordinal, interval, or ratio data? Justify your answer.
The top 14 speeds, in miles per hour, for professional drag racing over the past two decades are listed below. Find the median speed. 181.1 202.2 190.1 201.4 191.3 201.4 192.2 201.2 193.2 201.2 194.5 199.2 196.0 196.2 Question content area bottom Part 1 A. 195.8 B. 196.1 C. 201.2 D. 196.7
Given the following list of prices (in thousands of dollars) of randomly selected trucks at a car dealership, find the median. 20, 46, 19, 14, 42, 26, 33 Provide your answer below: median= thousands of dollars

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