10. A researcher claims that the mean monthly consumption of coffee per person is more than 19 cups. In a sample of 60 randomselected people, the mean monthly consumption was 20. The standard deviation of the sample was 4 cups. Which is the parameterto be tested in this claim?A. sample of 60 randomly selected peopleB. mean consumption of 60 selected peopleC. the mean consumption of coffee per personD. the standard deviation of the sample which was 4 cupsATEaITATEtho hirth weight of the babies will increase. The average birth

Here we are given that the sample data is normally distributed with mean 20 and standard…

10. A researcher claims that the mean monthly consumption of coffee per person is more than 19 cups. In a sample of 60 random selected people, the mean monthly consumption was 20. The standard deviation of the sample was 4 cups. Which is the paramete to be tested in this claim? A. sample of 60 randomly selected people B. mean consumption of 60 selected people C. the mean consumption of coffee per person D. the standard deviation of the sample which was 4 cups AT2 iuth woight of the babies will increase. The average birth

10. A researcher claims that the mean monthly consumption of coffee per person is more than 19 cups. In a sample of 60 random selected people, the mean monthly consumption was 20. The standard deviation of the sample was 4 cups. Which is the paramete to be tested in this claim? A. sample of 60 randomly selected people B. mean consumption of 60 selected people C. the mean consumption of coffee per person D. the standard deviation of the sample which was 4 cups AT2 iuth woight of the babies will increase. The average birth

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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15.) The mean wingspan for the population of a species of bird is known to be 30 inches, and the standard deviation for the wingspan of the population of the species of bird is known to be 4 inches. A researcher believes that the mean wingspan is actually less. He measures the wingspan of a sample of 10 birds, and finds that the mean wingspan of the birds in the sample is 28 inches. For a = 0.01 decide whether the mean wingspan is actually lower. a. State the null hypothesis and the alternative hypothesis. b. Is the test left-tailed, right-tailed, or two-tailed? c. Find the test statistic 0222 5) d. Find the critical value or p value f. Summarize the results 2 e. Should you reject the null hypothesis? 2091 0112 Bulevfabitino od bris Yazarifooyrt Hund belan buy luode b 20 Muzadi asosmmuz
A data set lists weights (lb) of plastic discarded by households. The highest weight is 5.74 lb, the mean of all of the weights is x = 1.866 lb, and the standard deviation of the weights is s = 2.472 lb. a. What is the difference between the weight of 5.74 lb and the mean of the weights? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the weight of 5.74 lb to a z score. d. If we consider weights that convert to z scores between -2 and 2 to be neither significantly low nor significantly high, is the weight of 5.74 lb significant?
According to a recent publication, the mean price of new mobile homes is $63,300. Assume a standard deviation of $7100. Let x denote the mean price of a sample of new mobile homes. a. For samples of size 100, find the mean and standard deviation of x. Interpret your results in words. b. Repeat part (a) with n= 200. a. For samples of 100 mobile homes, the mean and standard deviation of all possible sample mean prices are $ and $ , respectively. (Round to the nearest cent as needed.) all possible sample mean prices the prices of the mobile homes
Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest speed measured was 78.7 Mbps. The complete list of 50 data speeds has a mean of x overbar equals17.78 Mbps and a standard deviation of sequals 37.85 Mbps. a. What is the difference between carrier's highest data speed and the mean of all 50 data speeds? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the carrier's highest data speed to a z score. d. If we consider data speeds that convert to z scores between minus 2 and 2 to be neither significantly low nor significantly high, is the carrier's highest data speed significant?
II. Given the measurements 20, 26, 40, 39, 36, 25, and 34. Compute for standard deviations. ( show solutions ).
F60. The mean and the standard deviation of one sample are respectively 54.4 and 8; the mean and the standard deviation of another sample are 50.3 and 7 respectively. The size of the first sample is 50 and that of the second is 100. Find the mean and standard deviation of the composite sample (size 150) combining the aforesaid two samples.
The scores on an exam were normally distributed with a mean of 75 and a standard deviation of 8. There were 320 students that took the test.
Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest speed measured was 72.5 Mbps. The complete list of 50 data speeds has mean of x = 15.24 Mbps and a standard deviation of s= 34.08 Mbps. a. What is the difference between carrier's highest data speed and the mean of all 50 data speeds? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the carrier's highest data speed to a z score. d. If we consider data speeds that convert to z scores between -2 and 2 to be neither significantly low nor significantly high, is the carrier's highest data speed significant? a. The difference is Mbps (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 carrier's highest data speed is C
For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 39 beats per minute, the mean of the listed pulse rates is x overbar equals 77.0 beats per minute, and their standard deviation is sequals 21.2 beats per minute. a. What is the difference between the pulse rate of39 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 of39 beats per minutes to a z score. d. If we consider data speeds that convert to z scores between minus 2 and 2 to be neither significantly low nor significantly high, is the pulse rate of 39 beats per minute significant?
Assume that hybridization experiments are conducted with peas having the property that for offspring, there is a 0.75 probability that a pea has green pods. Assume that the offspring peas are randomly selected in groups of 30. Complete parts (a) through (c) below. a. Find the mean and the standard deviation for the numbers of peas with green pods in the groups of 30. The value of the mean isu= peas. (Type an integer or a decimal. Do not round.)
10. A researcher claims that the mean monthly consumption of coffee per person is more than 19 cups. In a sample of 60 randomly selected people, the mean monthly consumption was 20. The standard deviation of the sample was 4 cups. Which is the parameter to be tested in this claim? A. sample of 60 randomly selected people B. mean consumption of 60 selected people C. the mean consumption of coffee per person D. the standard deviation of the sample which was 4 cups 11. A researcher thinks that if expectant mothers use vitamins, the birth weight of the babies will increase. The average birth weight of the population is 3.9 kgs. What is the alternative hypothesis? А. На:р 3.9 12. According to the report, the average weight of Filipino newborn baby is 2. 8 kgs. Mellissa wants to perform a significance test to see if this holds true in her nation. She takes a random sample of babies and observes that the average weight of newborns is 3kgs. What is the null hypothesis? А. На:р 2.8 13. "A…