Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'wpdocs_custom_excerpt_length' not found or invalid function name in /home/myonysqo/myonlinehomeworkhelper.com/wp-includes/class-wp-hook.php on line 287

A cellular phone company advertises that the average age of its

josh
September 28, 2016 0 Comment

Affordable Essays

A cellular phone company advertises that the average age of its
A cellular phone company advertises that the average age of its customers is lower than 30 years. It is known that the customer ages follow a normal distribution. A random sample of 16 of this company’s customers responded as follows, when asked about their age: 35, 19, 25, 33, 32, 51, 65, 43, 44, 29, 33, 21, 34, 30, 25, 57. (25 points) a) Calculate the sample mean and sample variance. (4 points)
b) Develop an appropriate hypothesis to test the company’s claim at the 5% level of significance. (5 pts)
c) If the same sample results had been obtained from a random sample of 25 customers, could the company’s claim be rejected at a lower level of significance than in part (b)? (4 points)
d) Suppose that the alternative hypothesis has been one-sided and that it was set as Ha : ? < 30. Make a graph to visualize the problem and state, without doing the calculations, whether the p-value of the test (the level of significance needed to reject the null hypothesis) would be higher than, lower than, or the same as found in (c). (4 points)
e) Using the original data, test at the 5% significance level that the population standard deviation of customer ages is greater than 15. (4 points)
f) Using the original data, estimate the population standard deviation with 90% probability. (4 points)

We can offer a similar ASSIGNMENT at a reasonable price. All our papers are written from the scratch and 100% plagiarism free.

Facebook
Twitter
Google+
  • 100% Original Essays Guaranteed
  • 8 Hrs Delivery Available
  • Original and creative work
  • Timely delivery guaranteed
  • 100% confidentiality guarantee
  • Variety of disciplines, topics, and deadlines
  • Discounts offered on every custom-ordered paper
  • Original papers written from scratch;
  • 100% confidential;
  • 100% plagiarism-free;
  • Fast turn-around time;
  • Direct communication with the writer;
  • Instant email delivery;
  • Free plagiarism reports;
  • 24/7 customer support team.
  • Choose your font
  • 12 point font size
  • Double-sized
  • Over 275 words/page
  • Text aligned left
  • One inch margin

We Accept

myonlinehomeworkhelper

you have a money back guarantee if you are not satisfied with our services