A used car dealer says that the mean price of a three-year-old sports utility vehicle is $21,000. You suspect this claim is incorrect and find that a random sample of 21 similar vehicles has a mean price of $21,848 and a standarc deviation of $1985. Is there enough evidence to reject the claim at a = 0.05? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Write the claim mathematically and identify Ho and Ha. Which of the following correctly states Ho and H2? O A. Ho: =$21,000 B. Ho: H= $21,000 Ha: H#$21,000 OC. Ho: H > $21,000 Hgius $21,000 HaiH>$21,000 OD. Ho: H#$21,000 HaiH=$21,000 E. Ho:H= $21,000 Ha: H< $21,000 O F. Ho: H2 $21,000 HaiH< $21,000 (b) Find the critical value(s) and identify the rejection region(s). What is(are) the critical value(s), to? to = (Use a comma to separate answers as needed. Round to three decimal places as needed.) Determine the rejection region(s). Select the correct choice below and fill in the answer box(es) within your choice. (Round to three decimal places as needed.) A. O C. t< and t> D. t< (c) Find the standardized test statistic t. t= (Round to two decimal places as needed.)

A used car dealer says that the mean price of a three-year-old sports utility vehicle is $21,000. You suspect this claim is incorrect and find that a random sample of 21 similar vehicles has a mean price of $21,848 and a standarc deviation of $1985. Is there enough evidence to reject the claim at a = 0.05? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Write the claim mathematically and identify Ho and Ha. Which of the following correctly states Ho and H2? O A. Ho: =$21,000 B. Ho: H= $21,000 Ha: H#$21,000 OC. Ho: H > $21,000 Hgius $21,000 HaiH>$21,000 OD. Ho: H#$21,000 HaiH=$21,000 E. Ho:H= $21,000 Ha: H< $21,000 O F. Ho: H2 $21,000 HaiH< $21,000 (b) Find the critical value(s) and identify the rejection region(s). What is(are) the critical value(s), to? to = (Use a comma to separate answers as needed. Round to three decimal places as needed.) Determine the rejection region(s). Select the correct choice below and fill in the answer box(es) within your choice. (Round to three decimal places as needed.) A. O C. t< and t> D. t< (c) Find the standardized test statistic t. t= (Round to two decimal places as needed.)

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

A used car dealer says that the mean price of a three-year-old sports utility vehicle is $21,000. You suspect this claim is incorrect and find that a random sample of 21 similar vehicles has a mean price of $21,848 and a standarc
deviation of $1985. Is there enough evidence to reject the claim at a = 0.05? Complete parts (a) through (e) below. Assume the population is normally distributed.
(a) Write the claim mathematically and identify Ho and Ha.
Which of the following correctly states Ho and H2?
O A. Ho: =$21,000
B. Ho: H= $21,000
Ha: H#$21,000
OC. Ho: H > $21,000
Hgius $21,000
HaiH>$21,000
OD. Ho: H#$21,000
HaiH=$21,000
E. Ho:H= $21,000
Ha: H< $21,000
O F. Ho: H2 $21,000
HaiH< $21,000
(b) Find the critical value(s) and identify the rejection region(s).
What is(are) the critical value(s), to?
to =
(Use a comma to separate answers as needed. Round to three decimal places as needed.)
Determine the rejection region(s). Select the correct choice below and fill in the answer box(es) within your choice.
(Round to three decimal places as needed.)
A. <t<
В. t>
O C. t<
and t>
D. t<
(c) Find the standardized test statistic t.
t=
(Round to two decimal places as needed.)

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