If the population standard deviation is known to be 7.5, Ask an Expert

Statistics

A social scientist claims that the average adult watches less than 30 hours of television per week. He collects data on 50 individuals' television viewing habits and finds that the mean number of hours that the 50 people spent
watching television was 28.8 hours. If the population standard deviation is known to be 7.5 hours, can we conclude at the 5% significance level that he is right?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9430502

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Help me solve the following1 when there is a significant

Help me solve the following 1) When there is a significant difference in the population, but the research fails to find one ...this is what kind of error? 2) Assume that when victims are asked how well their needs were m ...

Buses run every 15 minutes along a certain route during

Buses run every 15 minutes along a certain route during rush hour. The time that a person would have to wait at a bus stop is uniformly distributed between 0 and 18 minutes. a. What is the probability that this person ha ...

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 you invest 2000 today and receive 9500 in five

Suppose you invest $2,000 today and receive $9,500 in five years. a. What is the internal rate of return? (IRR) of this? opportunity? b. Suppose another investment opportunity also requires $2,000 upfront, but pays an eq ...

On average the parts from a supplier have a mean of 975

On average, the parts from a supplier have a mean of 97.5 inches and a standard deviation of 6.1 inches. Find the probability that a randomly selected part from this supplier will have a value between 85.3 and 109.7 inch ...

A manufacturer of cereal has a machine that when working

A manufacturer of cereal has a machine that, when working properly, puts 20 ounces of cereal on average into a box with a standard deviation of 1 ounce. Every morning workers weigh 25 filled boxes. If the average weight ...

Suppose that the weight of all navel oranges is normally

Suppose that the weight of all navel oranges is normally distributed with mean of 8 ounces, if we know that the percentage of oranges that weigh less than 8.7 ounces is 68% find the standard deviation?

Question suppose x is a normally distributed random

Question: Suppose X is a normally distributed random variable with mean µ = 200 and standard deviation σ = 20 a. Sketch the probability density function of X¯. On the same graph, sketch the probability density function o ...

For the given cash flows below assume the cash flow is the

For the given cash flows below, assume the cash flow is the same in the next 2 years. Compute the NPV for each project, and compute the incremental IRR. Compare and explain why NPV always gives the correct decision. ...

One of your customers has just made a purchase in the

One of your customers has just made a purchase in the amount of $19,200. You have agreed to payments of $335 per month and will charge a monthly interest rate of 1.11 percent. How many months will it take for the account ...

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