User Account

All Pages

School run above the national average

Assignment Help Basic Statistics
Reference no: EM13985495

The principal of a charter school in Tampa believes that the IQs of its students are above the national average of 100. From the past experience, IQ is normally distributed with a standard deviation of 10. A random sample of 20 students is selected from this school and their IQs are observed. The following are the observed values.

95    91     110     93    133    119    113   107   110 89

113    100    100   124       116  113    110    106    115  113

(a) Test for the normality of the data

(b) Do the IQs of students at the school run above the national average at α = 0.01?

Reference no: EM13985495

Questions Cloud

Determining the average price of a gallon of gas : According to the Bureau of Labor Statistics (1996), the average price of a gallon of gasoline in all U.S. cities in the United States in January 1996 was $1.129. A later random sample in 24 cities found the mean price to be $1.24 with a standard d..
Annual expenditure per consumer unit : Assuming that the average annual expenditure of all consumer units was $30,692 in 1994, test at the 5% signi?cance level whether the annual expenditure per consumer unit had really increased from 1994 to 1995.
Determining the special-alloy steel shafts : A company that manufactures precision special-alloy steel shafts claims that the variance in the diameters of shafts is no more than 0.0003. A random sample of 10 shafts gave a sample variance of 0.00027. At the 5% level of signi?cance, test wheth..
Determine plot and normal plot for data : Do the data provide suf?cient evidence to indicate that the mean Hb level for children with chronic diarrhea is less than that of the normal value of 14.6 g/dL? Test the appropriate hypothesis using α = 0.01. Draw a box plot and normal plot for th..
School run above the national average : Test for the normality of the data Do the IQs of students at the school run above the national average at α = 0.01?
Con?dence interval for the population mean : (a) Test the hypothesis that H0 : μ = 44 vs. Ha : μ /= 44 using α = 0.10. Draw a box plot and normal plot for this data, and comment.(b) Find a 90% con?dence interval for the population mean μ. (c) Discuss the meanings of (a) an..
What value of d will rod and particle stationary after hit : A particle of mass M13. 10 and traveling horizontally with a speed of V0 = 12.2 m/s hits the rod and sticks to it. The particle's path is perpendicular to the rod at the instant of the hit and it hits at a distance d from the rod's center. At what..
Anova approach to test the appropriate hypotheses : (a) Use the ANOVA approach to test the appropriate hypotheses. Use α = 0.05. (b) Test the appropriate hypothesis by using the two-sample t-test for comparing population means. Compare the value of the t-statistic to the value of the F -statistic calc..
Where will be the image form : The second lens is a biconcave thin lens (index of refraction n = 1.57) and has a radius of curvature of 25.0 cm for both front and back surfaces. Where will be the image form?

Reviews

Write a Review

Basic Statistics Questions & Answers

  Use linear programming to determine how many units to

due to limited capacity only 200 of these can be made each month on regular time and the cost is 300 each. however an

  Production of walking-tour audiotapes

An enterprising art historian recently started a new business: the production of walking-tour audiotapes for use by those visiting major cities. She originally pro- duced tapes for eight cities:

  What is the coefficient of determination

What is the coefficient of determination, and wat is its meaning?

  Probability of lottery winnings

What is the probability you will win any money in the state lottery and the probability that you will win at least $100

  Find probability restaurants will give seat next saturday

Suppose that possibility of being seated at two restaurants are independent of each other, determine the probability that. Both restaurants will be able to seat you next Saturday night?

  Twenty percents of loans are larger than what amount

Normally distributed with a mean of $70,000 and a standard deviation of $20,000. Twenty percents of the loans are larger than what amount?

  Estimate a linear probability model with smoker as the

it has been conjectured that workplace smoking bans induce smokers to quit by reducing their opportunities to smoke.

  Hypothesis testing-f test for variance

The mean age of 25 randomly selected college seniors was found to be 23.5 years, and the standard deviation of all college seniors was 1.3 years. Which of the following is the correct symbol for 1.3 years?

  What are the mean and standard deviation of the sample

ACT scores of high school seniors. The scores of high school seniors on the ACT college entrance examination in 2003 had mean JL = 20.80 and standard deviation (J = 4.80. The distribution of scores is only roughly Normal.

  What is its mean and standard deviation

What is its mean and standard deviation? Repeat this exercise for n = 3 and compare your results. Determine the sampling distribution of the mean for samples of size n = 2.

  Sampling distribution of sample mean

Consider a large population with a mean of 170 and standard deviation of 25. A random sample of size 36 is taken from the population. Calculate the standard error of the sampling distribution of this sample mean and round your answer to the hundre..

  Nilpotents-ideals and nilradicals

Prove that if R is commutative ring and N=(a1,a2,..am) where each ai is a nilpotent element, then N is a nilpotent ideal, i.e N^n=0 for some positive integer n.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd