MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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leasing firm 2. need d & e
Transcribed Image Text:A leasing firm claims that the mean number of miles driven annually, μ, in its leased cars is less than 13,700 miles. A random sample of 70 cars leased from this
firm had a mean of 13,689 annual miles driven. It is known that the population standard deviation of the number of miles driven in cars from this firm is 1420
miles. Is there support for the firm's claim at the 0.05 level of significance?
Perform a one-tailed test. Then complete the parts below.
Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.)
and the alternative hypothesis H₁.
(a) state the null hypothesis
Ho · u = 13700
H : μ < 13700
(b) Determine the type of test statistic to use.
(c) Find the value of the test statistic. (Round to three or more decimal places.)
-0.065
(d) Find the critical value. (Round to three or more decimal places.)
0
(e) Can we support the leasing firm's claim that the mean number of miles
driven annually is less than 13,700 miles?
O Yes O No
μ
X
0#0
a
X
S
ロ=ロ OSO
On
O<O
Р
S
<8
010 A
O<O
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