A sample of the monthly amounts spent for food by families, Ask an Expert

Statistics

A sample of the monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical, bell-shaped frequnecy distribution. The sample mean is $150; the standard deviation is $20.

a) About 68 percent of the monthly food expenditures are between what two amounts?

b) About 95 percent of the monthly food expenditures are between what two amounts?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91018017

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

It is now may 1 2015 and timmy has just purchased a

It is now May 1, 2015, and Timmy has just purchased a five-year U.S. government bond (FV = $1,000) with a quoted price of 93.779. This bond has a 6-percent coupon rate, and the last semi-annual coupon payment was made on ...

A local postal carrier distributes first-class letters

A local postal carrier distributes first-class letters, advertisements, and magazines. For a certain day, she distributed the following number for each type of item. Delivered to First Class Letters Ads Magazines Home ...

Suppose that the waiting time for a pizza to be delivered

Suppose that the waiting time for a pizza to be delivered to an individual's residence has been found to be normally distributed with a mean of 30 minutes and a standard deviation of 8 minutes. What is the probability th ...

One study based on responses from 1016 randomly selected

One? study, based on responses from 1,016 randomly selected? teenagers, concluded that 44?% of teenagers cite grades as their greatest source of pressure. Use a 0.05 significance level to test the claim that fewer than h ...

A professor records the following final exam scores 68 6 m

A professor records the following final exam scores: 68 6 (M SD). Students scoring in the top 18% get an A. What is the cutoff score for the top 18% in this example?

Please help me find out how to calculate stock pricewhat is

Please help me find out how to calculate stock price. "What is the price of Company A's stock.We know company A pay dividend twice a year. And its beta=1.5 Government bond's Coupon is 8.8 and Yield is 5%(which one you sh ...

A company designs a new laptop computer and wants to

A company designs a new laptop computer and wants to investigate customers' preferences with respect to three select laptop features. The features are Price (High vs. low) Processor Speed (Low vs. medium vs. high) Weight ...

According to a study in a previous year 570 of households

According to a study in a previous year, 57.0% of households nationwide used natural gas for heating during a year. Recently, a survey of 2,700 randomly selected households showed that 58.0% used natural gas. Use a 0.05 ...

The stat 200 course coordinator wants to estimate the

The STAT 200 course coordinator wants to estimate the proportion of all online STAT 200 students who attend Penn State Learning tutoring sessions. In a survey of 72 students during the Summer 2018 semester, 8 had attende ...

A data firm records a large amount of data

A data firm records a large amount of data. Historically, 1.0% of the pages of data recorded by the firm contain errors. If two hundred pages of data are randomly selected? a. What is the probability that six or more pa ...

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