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

Put your comment

Ask Question & Get Answers from Experts
Browse some more (Basic Statistics) Materials
Suppose that in another study, 42 people used an herbal supplement and a high fiber, low-calorie diet to lose weight. The mean weight loss of this group was 7.05 pounds and th
Scientist would like to know if mental health clients of private versus public service agencies differ on Global Assessment of Functioning (GAF) scores and on Satisfaction w
Generalizations of the linear-by-linear model (7.11) analyze association between ordinal variables X and Y while controlling for a categorical variable that may be nominal o
The standard deviation of the sample is 2.5 calls. Using the .05 significance level, can we conclude that the mean number of calls per salesperson per week is more than 44?
A random sample of 165 flights completed this year reveals that 153 were on time. Can we conclude at the 5% significance level that the airline's on-time performance has imp
People in a large population average 60 inches tall. You take a random sample and will be given a dollar for each person in your sample who is over 65 inches tall.
Are sex and party affiliation related? Report the appropriate null and research hypotheses and the critical value (alpha = 0.05). In addition, provide your statistical conclus
In this assignment, we will focus on you, your relationship to leadership and change in your work context and the management ideas that have influenced those topics. Rather