B. Solve the following problems.1. The mean of the students in Grade 1 section Newton is 125 cm and the standard deviation is 3.5cm. Assuming the heights are normally distributed, what percent of the height is:a. Greater than 135 cm?b.Less than 128 cm?C. Between 128 cm and 135cm2. Consider the normal distribution of IQs with a mean of 100 and a standard deviation of 16. Whatpercentage of IQs are:a. Greater than 95?b.Less than 120?

Answered: Image /qna-images/answer/8892dea7-1018-43af-bef8-4bbef0db8e0a.jpg

Answered: B. Solve the following problems. 1. The…

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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For questions 6 through 11, refer to the following table, representing responses from the 2018 GSS: Respondent Sex Mean Hours Worked Last Week Standard Deviation N Male 44.60 14.969 670 Female 38.15 13.276 711 6. What proportion of females worked less than 40 hours per week? a. How many people in the sample does that correspond to?7. What percentage of males worked between 40 and 50 hours per week? a. How many people in the sample does that correspond to?8. What number of hours worked among females corresponds with a Z score of -2.00?9. Calculate the number of hours worked last week that corresponds to the 95th percentile for each sex. a. If you were going to calculate the 75th percentile, what Z value would you use? 10. Calculate the standard error for both males and females. a. What are you using for sigma, and why? 11. Calculate the 95% confidence interval for each sex. Can you say with 95% confidence that they are different? Why or why not? a. If you were…
For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 37 beats perminute, the mean of the listed pulse rates is x=77.0 beats per minute, and their standard deviation is s=24.8 beats per minute. a. What is the difference between the pulse rate of 37 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 37 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 37 beats per minute significant?
For a given frequency distribution data table, x= 6, Exf =1200 and Ef = 25 then the sample standard deviation equals: Select one: a. 11.5 b. 2.65 с. 3.54 d. 10.5
2. 1 (your instructor) am 66" tall. Assume that the population mean for adult males is 70" with a standard deviation of 2.5". What is the percentile of my height for adult males
The mean annual income for adult women in one city is $28,520 and the standard deviation of the incomes is $5,400. The distribution of incomes is skewed to the right. For samples of size 111 determine whether the distribution of x is normal or approximately normal and give its mean and standard deviation. O A. Normal, mean p; = $28,520, standard deviation o; = $5,400 O B. Approximately normal, mean p: = $28,520, standard deviation o: = $513 OC. Approximately normal, mean p- = $28,520, standard deviation o = $5,400 O D. Normal, mean p- = $28,520, standard deviation o- = 513
7.
3. In a normal frequency distribution of serum sodium concentrations, the mean is 141 mEq/L and the standard deviation is 3.2 mEq/L. Which of the following most closely represents the percentage of values in the interval between 137.8 mEq/L and 144.2 mEq/L? OA) 25% B) 50% C) 65% OD) 95% OE) 99% 456
Suppose the measurement of 800 items are normally distributed with mean 66 cm and standard deviation 5 cm, the number of items with measures 72 cm or more is A. 702 B. 708 C. 92 D. 98
1. The Population Mean IQ is 30 with a standard deviation of 5. Fill in the missing values in this table: X 30 62 48 25 2.50 -1.10 1.25

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