A newspaper reports that the average expenditure on Valentine's Day is $100.89. Do male and female consumers differ in the amounts they spend? The average expenditure in a sample survey of40 male consumers was $135.67, and the average expenditure in a sample survey of 30 female consumers was $62.64, Based on past surveys, the standard deviation for male consumers is assumedto be $45, and the standard deviation for female consumers is assumed to be $20.(e) What is the point estimate (in dollars) of the difference between the population mean expenditure for males and the population mean expenditure for females? (Use male-female)$63.03(b) At 99% confidence, what is the margin of error (in dollars)? (Round your answer to the nearest cent)$ 170725(c) Develop a 99% confidence interval (in dollars) for the difference between the two population means (Use male- female. Round your answer to the nearest cent)$55.9675 x to 5-90.1025x

The question is about confidence interval.Given :No. of male consumers ( n1 ) = 40No. of female…

Answered: A newspaper reports that the average…

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 quantitative data set has mean 25 and standard deviation 2. approximately what percentage of the observations lie between 21 and 29?
For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 36 beats per minute, the mean of the listed pulse rates is x=72.0 beats per minute, and their standard deviation is s=21.9 beats per minute. a. What is the difference between the pulse rate of 36 beats per minute and the mean pulse rate of the females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the pulse rate of 36 beats per minutes to a z score. d. If we consider pulse rates that convert to z scores between −2 and 2 to be neither significantly low nor significantly high, is the pulse rate of 36 beats per minute significant? a. The difference is ________ beats per minute. (Type an integer or a decimal. Do not round.) b. The difference is ________ standard deviations. (Round to two decimal places as needed.) c. The z score is z=_______ (Round to two decimal places as needed.) d. The lowest pulse rate is (1) (1)…
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Which of the following would be the most reasonable estimate for the weight of house cats? (The population would be all house cats in the U.S., and the variable would be each cat's weight.) A. Mean = 10 pounds, standard deviation = 0 pounds. B. Mean = 10 pounds, standard deviation = 2 pounds. C. Mean = 10 pounds, standard deviation = 10 pounds. D. Mean = 2 pounds, standard deviation = 10 pounds.
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For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 36 beats per minute, the mean of the listed pulse rates is x = 75.0 beats per minute, and their standard deviation is s = 25.8 beats per minute. a. What is the difference between the pulse rate of 36 beats per minute and the mean pulse rate of the females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the pulse rate of 36 beats per minutes to a z score. d. If we consider pulse rates that convert to z scores between - 2 and 2 to be neither significantly low nor significantly high, is the pulse rate of 36 beats per minute significant? a. The difference is beats per minute. (Type an integer or a decimal. Do not round.)

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