7.- A random sample of 50 consumers taste-tested a new snack food. Their responses were coded(0: do not like; 1: like; 2: indifferent) and recorded as follows:10012011000102022001100001020001001001010200110001OptionsFrequency table results for varl:Count - SoFrequency Relative Frequency.0.58varl .29150.30.12a) Use an 80% confidence interval to estimate the proportion of consumers who like the snack food.b) Test Ho: p = 0.50 against H3: p > 0.50, where p is the proportion of customers who do nót like thesnack food. Use a = 0.10.RR =Test statistics =P-value =Answer: CV =Conclusion: Keep H.Reject H,

Solution: Given information: n= 50 Sample size of consumers x = 15 consumers like the snack food .…

Answered: 7.- A random sample of 50 consumers…

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

3. Dentists make many people nervous. To assess any effect of such nervousness on blood pressure, the systolic blood pressure of 60 subjects was measured both in a dental setting and in a medical setting (The Effect of the Dental Setting on Blood Pressure Measurement," Amer. J. of Public Health, 1983:1210- 1214). For each subject, the difference between dental setting pressure and medical setting pressure was computed; the resulting sample mean difference and sample standard deviation of the differences were 4.47 and 8.77 mmHg, respectively. o (a) Estimate the true mean difference between blood pressures for these two settings using a 99% confidence level. o (b) Does it appear that the true mean pressure is different in a dental setting than in a medical setting? Explain your reasoning.
1) Speeds of vehicles at a certain highway location are normally distributed with a mean of 66.4 and a standard deviation of 8.8. Find the speed in mph that separates the fastest 4% from the others. Select one: a) 84.0 b) 81.8 c) 69.9 d) 70.9 e) 51.0 2) Find the number of respondents needed in a poll to determine within 1.5% margin of error, the percentage of US adults that prefer divided government. Use 90% conifdence and assume about 32% of US adults prefer divided government. Select one: a) 1693 b) 30 c) 1922 d) 3403 e) 2618
2. A normal level glucose control (80- 105 mg/dL) was tested at the beginning of the morning shift at a local hospital. The reagent used was of the same lot number, the instrument operator was the same, and all conditions were controlled to ensure the results would not be affected by environment or by any condition that could be controlled. The following values were recorded in 12 consecutive days. Calculate the Standard error of the mean (SEM) Days Glucose levels (mg/dL) 92 1 93 92 90 4. 89 87 8 89 88 7. 8. 6. 10 92 88 961 11 12 W TOSHIBA
9
In a large city, researchers selected a random sample of 120 individuals who have multiple televisions in their house connected to a streaming device. Each individual was asked how many hours of streaming content they watch in a typical week. The sample had a mean of 12.5 hours. For which of the following populations is 12.5 hours a reasonable estimate of the mean hours of weekly streaming content watched? (A) All individuals who regularly watch streaming content (B) All individuals from this city who regularly watch streaming content (C) All individuals from this city with multiple streaming devices in their house (D) All individuals from this city with multiple streaming devices in their house who regularly watch streaming content (E) All 120 individuals in this city with multiple streaming devices in their home who regularly watch streaming content
2.) A researcher is interested in the number of words four-year-old children understand in an unfamiliar accent. On average four-year-olds understand an average of μ = 1,500 words with a standard deviation of o = 72 words. A random sample of n-64 four-year-olds complete a study identifying objects labeled in an unfamiliar accent. The sample had a mean score of M = 1485. Does accented speech influence a child's understanding? Test at the a=.05 level. a.) Step 1: State the Hypotheses Ho: H₁: b.) Step 2: Determine the critical region and draw it on the distribution above: Zritical- c.) Step 3: Calculate the test statistics (here: a z-test). Zobserved = d.) Step 4: Make a decision. Circle one: Reject Null (Ho) or Fail to Reject Null (Ho) e.) State your conclusions about the research scenario in sentence form: f.) What is the estimated effect size (Cohen's d) in this study? Do you characterize it as being small, medium or large? d=
A sample consisting of four pieces of luggage was selected from among the luggage checked at an airline counter, yielding the following data on x = weight (in pounds). x1 = 33.1, x2 = 27.2, x3 = 36.8, x4 = 30.9 Suppose that one more piece is selected and denote its weight by x5. Find all possible values of x5 such that x = sample median. (Enter your answers as a comma-separated list.)
Announcements for 83 upcoming engineering conferences were randomly picked from a stack of IEEE Spectrum magazines. The mean length of the conferences was 3.96 days, with a standard deviation of 1.24 days. Assume the underlying population is normal. 1)In words define the random variables x and x̅ X is the mean length from a sample of 83 engineering conferences and x̅ is the length of an engineering conference. X is the length of an engineering conference and x̅ is the mean length from a sample of 83 engineering conferences. X is the number of engineering conferences and x̅ is the mean number of engineering conferences listed in IEEE spectrum magazine. X is the mean number of engineering conferences listed in IEEE spectrum magazine and x̅ is the number of engineering conferences. 2)Which distribution should you use for this problem? Explain your choice. The student’s t-distribution should be used because the sample mean is smaller than 30. The student’s t-distribution…
The lengths of pregnancies in a small rural village are normally distributed with a mean of 269 days and a standard deviation of 16 days. a) In what range would you expect to find the middle 68% of most pregnancies? Between and b) If you were to draw samples of size 38 from this population, in what range would you expect to find the middle 68% of most averages for the lengths of pregnancies in the sample? Between and Enter your answers as numbers. Your answers should be accurate to one decimal places. Submit Question ロI & #3 2$ 6 7 8. 2 3 4 y e d f h づ
A sample consisting of four pieces of luggage was selected from among the luggage checked at an airline counter, yielding the following data on x = weight (in pounds). x1 = 33.7, x2 = 27.2, x3 = 36.8, x4 = 30.7 Suppose that one more piece is selected and denote its weight by x5. Find all possible values of x5 such that x = sample median. (Enter your answers as a comma-separated list.) x5 =
Suppose that we have a set of 1000 values with average 4, and standard deviation 3. (This is population data). a) The sum of the values of this set is b) The sum of squares of deviations from the average of the values is c) The sum of squares of the values is d) If the data has an empirical histogram, 7 is approximately the integer as the answer). th percentile (Give an The 97.5th percentile is approximately (Give an integer as the answer). e) If the histogram of the data is unknown, the (100 * ) th percentile is at most

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS