Statistics and Probability Answers

In a sample of 500 people in Rajastan , 280 are rice eaters
and the rest are wheat eaters. can we assume that both rice and
wheat are equally popular in this district at 1% level of significance?

About ​8% of the population of a large country is . If two people are randomly​ selected, what is the probability both are ​? What is the probability at least one is ​?

Suppose x is distributed with a mean of 25.1 and a standard deviation of 3.2. What is the probability of randomly selecting an individual from this distribution with a value that is greater than 21.2 and less than 23.4?

Suppose the p-value in a one-tailed test is 0.0092 Based on the same population, sample and null hypothesis the p-value for a corresponding two-tailed test is
1. 0.9908
2. 0.0148
3. 0.0184
4. 0.0018
5. 0.0092

A variable of a population has a mean of u=100 and a standard deviation a=28 the value of the sample mean standard X for a sampling distribution of size 49 is
1. 14.29
2. 4
3. 51
4.10.29
5.100

In a random sample of n=100 observations we found the proportion of success to be 48% .The 95% confidence interval for the population proportion is
1. (0.449 ; 0.511)
2. (0.5 ; 0.95)
3. (0.480 ; 0.501)
4. (0.944 ; 0.151)
5. (0.48 ; 0.031)

Assume that the population standard is known to obtain a confidence interval for the population mean is reasonable to use
1. The Z-interval procedure
2. The two tall procedure
3. The t-interval procedure
4.The one-tail procedure
5. A sample size greater than 30

A random sample of 40 regions give a sample mean of × = R688 per 50 kilograms of watermelon. Assume that the population standard deviation is R192 per so kilograms. The critical value to estimate a 95% confidence interva of the population mean
1. 1, 645
2. 1.684
3. 2. 021
4. 1.96
5. 5%

find the point estimate of the population mean given the population mean of 100, sample mean 5.24 ans standard deviation 2.18

A can solve 90 percent of the problems given in a book and B can solve 709 percent. what is the probability that at least one of them will solve a problem selected at random?