The following is the distribution of the readings obtained, Ask an Expert

Statistics

The following is the distribution of the readings obtained with a Geiger counter of the number of particles emitted by a radioactive substance in 100 successive 40-second intervals:

(a) Verify that the mean and the standard deviation of this distribution are = 20 and s = 5.

(b) Find the probabilities that a random variable having a normal distribution with μ = 20 and σ = 5 will take on a value less than 9.5, between 9.5 and 14.5, between 14.5 and 19.5, between 19.5 and 24.5, between 24.5 and 29.5, between 29.5 and 34.5, and greater than 34.5.

(c) Find the expected normal curve frequencies for the various classes by multiplying the probabilities obtained in part (b) by the total frequency, and then test at the 0.05 level of significance whether the data may be looked upon as a random sample from a normal population.

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91894007

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

A student is gathering data on the driving experiences of

A student is gathering data on the driving experiences of other college students. One of the variables measured is the type of car the student drives. These data are coded using the following method: 1 = subcompact, 2 = ...

Sixty percent of adults have looked at their credit score

Sixty percent of adults have looked at their credit score in the past six months. If you select 31 customers, what is the probability that at least 25 of them have looked at their score in the past six months?

A particular brand of tires claims that its deluxe tire

A particular brand of tires claims that its deluxe tire averages at least 50,000 miles before it needs to be replaced. From past studies of this tire, the standard deviation is known to be 8,000. A survey of owners of th ...

Suppose the timing device used in the mens race failed to

Suppose the timing device used in the men's race failed to activate at the start of the race and instead began to record the times seconds into the race. Consider how the competitors' times would be affected. Would the s ...

Based on college data scores on a certain test can be seen

Based on college data, scores on a certain test can be seen as normally distributed that can show the mean of 1524 and a standard deviation of 318. What percentage of scores are greater than 1842 and if needed round to t ...

Find the mean and the standard deviation of a binomial

Find the mean and the standard deviation of a Binomial Distribution with n = 65 and p = 0.32 Mean = 24; Stand. Deviation= 4.1 Mean = 20.8; Stand. Deviation= 3.76 Mean = 28; Stand. Deviation= 3.66 Mean = 21.8; Stand. Devi ...

1 summary statistics for returns on two stocks x and y are

1. Summary statistics for returns on two stocks X and Y are listed below. Mean Variance Stock X 2.83% 0.006000 Stock Y 5.98% 0.003000 The covariance of returns on stocks X and Y is 0.001500. Consider a portfolio of 80% s ...

Suppose you want to estimate the proportion of traditional

Suppose you want to estimate the proportion of traditional college on your campus who own their own car. Based on some research on other campuses, you believe the proportion will be near 25%. What sample size is needed i ...

A researcher conducts a hypothesis test using a sample from

A researcher conducts a hypothesis test using a sample from an unknown population. If the t statistic has df = 35, how many individuals were in the sample?

The recent poll revealed that 68 out of 98 men and 45 out

The recent Poll revealed that 68 out of 98 men and 45 out of 85 women expressed "at least some support" for a new municipal policy. At the 5% significance level, does the proportion of Supporting the policy differ from t ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert