Let's shake on it: A random sample of 12-ounce milkshakes from 12 fast-food restaurants had the following number of calories. Let's shake on it: A random sample of 12-ounce milkshakes from 12 fast-food restaurants had the following number of calories.450399591504510613476700473375472642Send data to ExcelAssume the population standard deviation is o =93.Part: 0 / 3Part 1 of 3Explain why it is necessary to check whether the population is approximately normal beforeconstructing a confidence interval.It is necessary to check whether the population is approximately normal because(Choose one)the sample size is less than or equal to 30the sample standard deviation is not knownthe population mean is not knownthe population standard deviation is not known

Explain why it is necessary to check whether the population is approximately normal before…

Answered: Let's shake on it: A random sample of…

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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Ms Greenaway sells mangoes at a roundabout in her town. On any given day, the probability of Ms Greenaway selling 0 mangoes is 0.1, the probability of Ms Greenaway selling 1 mango is 0.7 and the probability of Ms Greenaway selling 2 mangoes is 0.2. (a) Construct the probability distribution table for Ms Greenaway’s mango sales. (b) Calculate Ms Greenaway’s expected daily mango sales and the standard deviation of Ms Greenaway’s daily mango sales.
How small are the smallest 2.5% of all bladders among women?
5. 43% of the students in a school are boys. If there are 399 girls in the school, what is the entire population of the school? [2]
Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 400 students taken from this year's student body showed the following number of students in each classification. Freshmen 113 Sophomores 98 Juniors 115 Seniors 74 We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year. The calculated value for the test statistic equals Select one: a. .54. b. .65. c. 2.063. d. 2.664.
a report about an isolated community claims there are more newborn females than males although we assume equal frequencies for each. Records indicate 628 boys and 718 girls born in the past month. what are Ho and Ha?
Does the type of instruction in a college statistics class (either lecture or self-paced) influence students’ performance, as measured by the number of quizzes successfully completed during the semester? Twelve students were recruited for the study. Students received the lecture instruction or a self-paced instruction. The total number of quizzes completed during teach type of instruction appear below.
Based on a survey, more than 1 in 4 American children have cholesterol levels of 180 milligrams or higher.
Two scales at Aussieburgers, Ltd. were used to weigh the same 24 samples of hamburger patties for a fast-food restaurant in Australia. Results are shown below. The samples were weighed in grams, and the supplier has ensured that each patty weighs 114 grams. Which of the following is correct? Scale A: 117, 113, 115, 111, 115 111, 117, 115, 118, 118 114, 113, 116, 112, 118 113, 113, 117, 114, 118 117, 118, 111, 115, 114 Scale B: 117, 111, 114, 117, 111 116, 112, 116, 117, 118 112, 115, 112, 118, 115 114, 117, 116, 111, 114 116, 116, 112, 114, 117 Question 1 options: A. Scale A is more accurate and A is more precise. B. Scale A is more accurate and B is more precise. C. Scale B is more accurate and B is more precise. D. Scale B is more accurate and A is more precise.
The average grade for a group of students in a statistics exam was 85 points, with a standarddeviation of 3 points.a. What proportion of students have at least 80 points on the exam? b. What proportion of students have less than 80 points on the exam?
You want to test whether the true proportion teenagers who can swim is below 1/4. In a random sample of 70 teenagers, 40 can swim. what is the test statistic for the test?
18. The governor of New York has banned selling or purchasing "large" soft drinks, where a "large" is defined as being more than 16 oz. Sonic, famous for its Route 44 drinks is interested in estimating the proportion of New Yorkers that favor this ban. From a random survey of 800 New Yorkers, 375 answered no to the question, “Do you favor the governor's ban on 'large' soft drinks?" a. Find a 97.5% confidence interval for the proportion of New Yorkers who favor the ban on "large" soft drinks. b. Interpret the confidence interval. c. Can you conclude with 97.5% confidence that a majority of New Yorkers favor the ban on "large" soft drinks? Why or why not. d. Without doing any other calculations, can you be 99% confident that a majority of New Yorkers favor the ban on “large" soft drinks?
According to a census company. 7 1% of all bables bom are of low birth weight. An obstetrician wanted to know whether mothers between the ages of 35 and 39 years give birth to a higher percentage of low-birth-weight babies. She randomly selected 240 births for which the mother was 35 to 39 years old and found 28 low-birth-weight bables. Complete parts (a) through (c) below. (a) lf the proportion of low-birth-welght babies for mothers in this age group is 0.071, compute the expected number of low-birth-weight births to 35- to 39-year-old mothers. What is the expected number of births to mothers 35 to 39 years old that are not low birth weight? The expected number of low birth-weight births to 35- to 39-year-old mothers is The expected number of births to mothers 35 to 39 years old that are not low birth weight is (Type integers o decimals)

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