Download Joint Probabilty-Statistics-Quizs and more Exams Statistics in PDF only on Docsity!
4. find value of A in joint probabilty of f(x,y) for exp AY-x/2 whereas 0<y<1, 0<x<1.
1.A random variable X is normally distributed with
50 and ^2 25
. Find the probability of x larger than 54.
2.A random sample of 50 observations is drawn from a normal distribution
with 2 52
. Suppose that the sample mean is found to be X^ 71.Find 95%
confidence interval for
3.Find the value of chi-square from the following table.
Number of
Custome
r
Arrivals
Observed Frequenc y oi
Expected Frequency ei
9 or
more
4.Construct a stem-and-leaf display from the following data. 48, 31, 54, 37, 18, 64, 61, 43, 40, 71, 51, 12, 52, 65, 53, 42, 39, 62, 74, 48, 29, 67, 30, 49, 68, 35, 57, 26, 27, 58.
5.The p. d. f. of a r.v. is given
(^4 0 ) 5 0
f x x x
elsewhere
Calculate P(X<0.5)
6.If population proportions are given as:
Find
(^1 )
2
p ˆ p ˆ
,where n = 10
7.Formulate the null and alternative hypothesis in each of the following. (1) Average domestic consumption of electricity is 50 units per month. (2) Not more than 30% people pay Zakat (tax).
10.An exercise physiologist wants to demonstrate that the average person walks more than 800 km per year. State the null and alternative hypothesis.
P 1 0.30, P 2 0.20.
Construct the 95% confidence interval for the difference between the two population means. ( 5)
- there was a question of hypothesis testing of H0:variane1<variencs2. values of s1,s2,n1,n2 was given
find the critical value of chi-square a boy sell ambrellas on rainy days and earn 30$ and in other days he can earn 24$ , if the propability of rain is 0.3% what will he expectation? some data was given,find P(X>25)
- A sample of siz n=3 drawn without replacement expirenment from a population N=5 items whose values ,0,2,3,6,7 draw possible samples
- Calculate sampling error if sample is 102 and population mean is 100
- A random sample of 12 observations is drawn then a normal distribution with =33.suppose that the sample means is found to be Find 96% confidence interval for
- A sample of siz n=3 drawn without replacement expirenment from a population N=5 items whose values ,0,2,3,6,7 draw possible samples
- Calculate sampling error if sample is 102 and population mean is 100
- A random sample of 12 observations is drawn then a normal distribution with =33.suppose that the sample means is found to be Find 96% confidence interval for
- RCBD with MSE=200Measure of treatments=4 no of block=5 Then find value of LSD test for
