Question

The weight of baby elephants is believed to be Normally distributed, with a mean of 123.5 pounds. The average weight of a random sample of 35 baby elephants is found to be 125.7 pounds, with a standard deviation of 11.3 pounds. What is the standard error of the mean? a) 2.2 b) 13.75 c) 5.92 d) 1.91 e) We are unable to determine the standard error of the mean because we do not know σ.

Name: the weight of baby elephants is believed to be normally distributed with a mean of 1235 pounds the average weight of a random sample of 35 baby elephants is found to be 1257 pounds with a st 62887
Uploaded: 2023-03-13T13:56:32-08:00
Duration: 1 min 8 s
Channel: Madhur L
Description: the weight of baby elephants is believed to be normally distributed with a mean of 1235 pounds the average weight of a random sample of 35 baby elephants is found to be 1257 pounds with a st 62887

          The weight of baby elephants is believed to be Normally
distributed, with a mean of 123.5 pounds. The average weight of a
random sample of 35 baby elephants is found to be 125.7 pounds,
with a standard deviation of 11.3 pounds. What is the standard
error of the mean?
 a) 2.2 
b) 13.75 
c) 5.92 
d) 1.91 
e) We are unable to determine the standard error of the mean
because we do not know σ.

Added by Jonathan S.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Madhur L

03/13/2023

Step 1

The formula for SEM is: SEM = σ / √n where σ is the population standard deviation and n is the sample size. In this case, we are given the sample standard deviation (s), not the population standard deviation (σ). However, we can use the sample standard Show more…

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The weight of baby elephants is believed to be Normally distributed, with a mean of 123.5 pounds. The average weight of a random sample of 35 baby elephants is found to be 125.7 pounds, with a standard deviation of 11.3 pounds. What is the standard error of the mean? a) 2.2 b) 13.75 c) 5.92 d) 1.91 e) We are unable to determine the standard error of the mean because we do not know σ.