+1-415-670-9189
info@expertsmind.com
Assuming that the amount spent follows a normal distribution
Course:- Basic Statistics
Reference No.:- EM1319194


Assignment Help
Assignment Help >> Basic Statistics

The 95% confidence Interval for one population mean.

1. A study at a college in the west coast reveals that, historically, 45% of their students are minority students.  If random samples of size 75 are selected, 80% of the samples will have less than ______% of minority students.

2. A major department store chain is interested in estimating the average amount its credit card customers spent on their first visit to the chain's new store in the mall. Fifteen credit card accounts were randomly sampled and analyzed with the following results= $50.50 and s2 = 400. Construct a 95% confidence interval for the average amount its credit card customers spent on their first visit to the chain's new store in the mall assuming that the amount spent follows a normal distribution.

1.       $50.50 ± $9.09

2.       $50.50 ± $10.12

3.       $50.50 ± $11.00

4.       $50.50 ± $11.08


Ask Question & Get Answers from Experts
Browse some more (Basic Statistics) Materials
A population of scores has p = 44. In this population, an X value of 40 corresponds to z = - 0.50. What is the population standard deviation.
The number of choco chips in an 18 ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1256 and a standard deviation of 129 chips, What
Among 620 adults selected randomly from among the residents of one town, 18.9% said that they favor stronger gun-control laws.
Critically discuss the Central Limit Theorem? How large should the sample size be if the underlying distribution of the population values are:
If population standard deviation is σ = 8 is effect large adequate to be statistically significant? Use two - tailed effect with α = .05
A class contains 30 students. Ten are female (F) and U.S. citizens (U); 12 are male (M) and U.S. citizens; 6 are female and non-U.S. citizens (N); 2 are male and non U.S. ci
A test was conducted to determine whether gender of a spokesperson affected the likelihood that consumers would prefer a new product.
In a random sample of 800 customers selected for a short phone interview, 96 have stated that they have received their shipments late. The company's claim is that the percen