In Country A, the population mean height for 10-year-old girls is 54.3 inches with a standard deviation of 2.3 inches. Suppose a random sample of 15 10-year-old girls from Country B is taken and that these girls had a sample mean height of 53.9 inches with a standard deviation of 2.6 inches. Assume that heights are Normally distributed. Complete parts (a) through (c) below. O D. T10. p- 34.J O C. TIO- H- 34.J O A. TI0.p+ 34.J Ha u= 54.3 H3: u#54.3 Ha u< 54.3 k O E. Ho u> 54.3 Ο Ε. H :μ 54.3 Ο D. H, : μ< 54.3 H p= 54.3 H3: u= 54.3 Ha: u> 54.3 Check the conditions to see whether the test statistic will follow a t-distribution. random and the observations independent. The distribution of the heights is Normally distributed. The sample is are Find the test statistic. t= 60.14 (Round to two decimal places as needed.) Find the p-value. p= 0.000 (Round to three decimal places as needed.) Interpret the results of the test. Since the p-value is less than or equal to the significance level, do not reject Ho. There is insufficient evidence to conclude that the height for 10-year-old girls from Country B is significantly different from the Country A population mean at a significance level of 0.05. (1,1) TC More

In Country A, the population mean height for 10-year-old girls is 54.3 inches with a standard deviation of 2.3 inches. Suppose a random sample of 15 10-year-old girls from Country B is taken and that these girls had a sample mean height of 53.9 inches with a standard deviation of 2.6 inches. Assume that heights are Normally distributed. Complete parts (a) through (c) below. O D. T10. p- 34.J O C. TIO- H- 34.J O A. TI0.p+ 34.J Ha u= 54.3 H3: u#54.3 Ha u< 54.3 k O E. Ho u> 54.3 Ο Ε. H :μ 54.3 Ο D. H, : μ< 54.3 H p= 54.3 H3: u= 54.3 Ha: u> 54.3 Check the conditions to see whether the test statistic will follow a t-distribution. random and the observations independent. The distribution of the heights is Normally distributed. The sample is are Find the test statistic. t= 60.14 (Round to two decimal places as needed.) Find the p-value. p= 0.000 (Round to three decimal places as needed.) Interpret the results of the test. Since the p-value is less than or equal to the significance level, do not reject Ho. There is insufficient evidence to conclude that the height for 10-year-old girls from Country B is significantly different from the Country A population mean at a significance level of 0.05. (1,1) TC More

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Select the letter of the correct answer: A random variable X has a mean of 45 and a standard deviation of 11. Find the corresponding z-score for x=22. Choices: A. -2.09 B. 1.54 C. 0.24 D. -1.54
Find the mean and standard error of the mean of the sampling distribution. Then sketch a graph of the sampling distribution. The prices of photo printers on a website are normally distributed with a mean of $238 and a standard deviation of $67. Random samples of size 33 are drawn from this population and the mean of each sample is determined.
answer letter a,b, and c
The following table gives the marks of a sample of students in Statistics. Marks No. of Students 40 to less than 50 50 to less than 60 12 60 to less than 70 22 70 to less than 80 34 80 to less than 90 39 90 to less than 100 19 The mean is: Select one: 71.75 74.25 75.98 76.27
Assume that adults have IQ scores that are normally distributed with a mean of 102.1 and a standard deviation 16.3. Find the first quartile Q1, which is the IQ score separating the bottom 25% from the top 75%. (Hint: Draw a graph.)
A vending machine dispenses coffee into a twelve-ounce cup. The amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.04 ounce. You can allow the cup to overfil 3% of the time. What amount should you set as the mean amount of coffee to be dispensed? Cik to View ongn 1.o the table Click to view. Dagn 2.of the tabin. Dounces (Round to two decimal places as needed.)
Assume that the heights of women are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. If 100 women are randomly selected, find the probability that they have a mean height greater than 63.0 inches. O A. 0.0082 O B. 0.8989 O C. 0.2881 O D. 0.9918 Next View Instructor Tip Calculator 809 PM 70°F Cloudy 10/8/2021 33 2 Type here to search 10/05/17 PrtSc Insert Delete AI F9 F10 F11 F12 F7 F8 F5 F6 Esc F3 F4 F1 & Backspace Num Lock C@ %23 5 7 080 3 T. Y కాం Home C Tab H. K Enter G A CapsLk 1 Shift C V N End hift PgUp Alt Ctrl End + |/ A MI 小 44
Compute the standard deviation of the sampled proportions if p=.8 and n=50. Round to three places.
Suppose the variance of a sample is 5.7. Find the standard deviation. Round to two decimals. Submit Question
The mean and standard deviation of a set of 11 observations of time are 8 seconds and 2.5 seconds respectively. An observation, equal to the mean, is removed from the dataset. The new variance in seconds is approximately: A. 6.51 sec B. 7.00 sec C. 7.53sec D. 6.94 sec
In Country A, the population mean height for 3-year-old boys is 37 inches. Suppose a random sample of 15 3-year-old boys from Country B showed a sample mean of 36.8 inches with a standard deviation of 2 inches. The boys were independently sampled. Assume that heights are Normally distributed in the population. Complete parts a through c below. a. Determine whether the population mean for Country B boys is significantly different from the Country A mean. Use a significance level of 0.05. Which of the following correctly states Ho and Ha? Ho: µ#37 O A. Ho: μz37 Oc. H3i µ 37 OB. Hai H=37 Hai us37 Ho: H = 37 Ha:µ 37 Ho: µ= 37 Ha: H#37 Find the test statistic. t= -0.39 (Type an integer or decimal rounded to two decimal places as needed.) Find the p-value. p (Type an integer or decimal rounded to three decimal places as needed.)
A firm makes MP3 players. The research department at this firm found that the life of the MP3 players is normally distributed with a mean of 4900 hours and a standard deviation of 450 hours. How many playing hours should a warranty cover if the firm wants 7% of the MP3 players to be below this amount? A. 5566 B. 4234 C. 4900 D. 1.48