### Example on sampling distribution

Assignment Help Basic Statistics
##### Reference no: EM137684

1. A study sponsored by American Express Co. and the French government tourist office found that old American stereotypes about French unfriendliness weren't true. The respondents were more than 1,000 Americans who have visited France more than once for pleasure over the past two years. The results of this study are probably

A. very accurate given the large sample size.
B. very inaccurate since the sample is only a small fraction of all Americans who have visited France.
C. biased, overstating the extent to which the old stereotypes weren't true.

2. In order to assess the opinion of students at the University of Montana on campus snow removal, a reporter for the student newspaper interviews the first 12 students he meets who are willing to express their opinion. In this case, the population is

A. all students at universities receiving substantial snow.
B. the 12 students interviewed.
C. all students at the University of Montana.

3. Suppose you are going to roll a die 60 times and record , the proportion of times that a 1 or a 2 is showing. The sampling distribution of should be centered about

A. 1/6.
B. 1/3.
C. 20.

#### Questions Cloud

 Observational and sample study : A statistics instructor wants to know which route will get her to school the fastest. Each day from October 2 to November 15, when she gets to the turn point she checks the odometer on her car What is the explanatory variable in this study : Use the list of random digits below to assign 4 men and 2 women to the shark fin treatment. Read the table from left to right, first selecting the 4 men and then the 2 women. Use the numerical labels given in the chart to the names. Sampling variability : A simple random sample of 1000 Americans found that 61% were satisfied with the service provided by the dealer from which they bought their car. Evalauate the variance of their salaries : A random sample of students is selected, and each one is asked to try first brand A and then brand B, or vice versa with the order determined at random. Example on sampling distribution : A study sponsored by American Express Co. and the French government tourist office found that old American stereotypes about French unfriendliness weren't true. Example on stratified random sample : Researchers are studying the absorption of two drugs into the bloodstream. Each drug is to be injected at three dosages. There are 24 people in the study, and they are randomly divided into six groups. Strength of a relationship : Which of the following measures only the strength of a relationship? World record time in the marathon : The world record time (in minutes) in the marathon is plotted versus the year in which the record was set for men and women separately. The plotting symbol o is used for men and x for women. The data include only records set between 1908 and 1988. Data in the scatterplot : The data in the scatterplot below are an individual's weight and the time it takes (in seconds) on a treadmill to raise his or her pulse rate to 140 beats per minute. The o's correspond to females and the +'s to males.

### Write a Review

#### State the values of the coefficient of correlation

State the values of the coefficient of correlation and coefficient of determination correct to three decimal places

#### Determine the standard deviation

Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6 What is the vari..

#### Find out optimal decision

Find out optimal decision

#### Mean of the data represented in this stemplot

Consider the following stemplot.  The mean of the data represented in this stemplot ?

#### Find the height of the density curve

A random variable has the density curve as in the graph below. Find  The height of the density curve?

#### Determine the value of k

MATH1550H: Assignment:  Question:     Experience shows that X, the number of customers entering a post office during any period of time t, is a random variable the probability mass function of which is of the form

#### Prepare a power curve for this decision rule

Prepare a power curve for this decision rule

#### Consistent with the scatterplot

Which of the following statements is consistent with the scatterplot

#### Correlation between the amount spent and gender

At a large department store, the amount a shopper spent and the shopper's gender (male or female) were recorded. To determine if gender is useful in explaining the amount of money a shopper spends at the store we could

#### Write introduction to statistical process control

Write introduction to SPC (STATISTICAL PROCESS CONTROL)? Describe the use of SPC tools used at D2D?

#### Find the interquartile range of the salaries

Suppose each employee in the company receives a \$3000 raise for next year (each employee's salary is increased by \$3000). The interquartile range of the salaries will

#### Solve the mean and standard deviation equations

Solve the mean and standard deviation equations