The length of time sixth graders watch television each day, Ask an Expert

Statistics

The length of time sixth graders watch television each day is normally distributed with a mean = 118.3 minutes and standard deviation = 43.1 minutes. Use this information to answer the following:

(a) If 30 sixth graders are selected at random, find the probability that the mean amount of time spent watching television is between 120 and 150 minutes. Use the Central Limit theorem. (b) It is reported that 12% of sixth graders watch the TV show Laguana Beach. You randomly select 200 sixth graders and ask each if he or she watches Laguana Beach. What is the probability that 30 or more say yes? Use the Normal Approximation to the Binomial.

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91790993

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

A researcher selects from a participant pool of 8 males and

A researcher selects from a participant pool of 8 males and 11 females. He determines that the probability of selecting 2 female participants is p = .335. Based on this probability, what strategy did the researcher use t ...

Suppose a researcher is interested in the number of good

Suppose a researcher is interested in the number of good versus bad dreams that students have during final exam week. The researcher states that p = 0.52 that a student will have a bad dream during final exam week. (a) ...

A hotel claims thatnbsp95 of its customers are very

A hotel claims that 95?% of its customers are very satisfied with its service. Complete parts a through d below based on a random sample of seven customers. What is the probability that more than six customers are very? ...

During a 52 week period a company paid overtime wages for

During a 52 week period a company paid overtime wages for 16 weeks and hired temporary help for 7 weeks. During 6 weeks the company paid overtime and hired temporary help (a) Are the events? "selecting a week that contai ...

According to bottledwaterorg per capita consumption of

According to bottledwater.org, per capita consumption of bottled water in the U.S. in 2012 was reported to be 30.8 gallons. Assume that the amount of bottled water consumed per person is Normally distributed with mean 30 ...

Now assume that i am talking about a normally distributed

Now assume that I am talking about a normally distributed set of data: An IQ test. This IQ test has a mean of 100 and a standard deviation of 15. Find the following probabilities What is the probability that someone scor ...

Determine the critical values for a left-tailed test of a

Determine the critical? value(s) for a? left-tailed test of a population mean at the alpha α=0.01 level of significance based on a sample size of n=15.

The distribution of heights of adult american women is

The distribution of heights of adult American women is approximately normal with a mean of 64 inches and standard deviation of 2 inches. What percent of women is taller than 68 inches?

A random sample of the closing stock prices in dollars for

A random sample of the closing stock prices in dollars for a company in a recent year is listed below. Assume that sigma σ is ?$2.59. Construct the 90?% and 99?% confidence intervals for the population mean. Interpret th ...

If all the data values in a population are converted to

If all the data values in a population are converted to? z-scores, the distribution of? z-scores will have what? mean? Choose the correct answer below. A. The mean of the? z-scores will be zero. B. The mean of the? z-sco ...

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