Question

Determine the minimum sample size required when you want to be 99% confident that the sample mean is within 0.50 units of the population mean. Assume a population standard deviation of 1.4 in a normally distributed population.

53

52

30

31

Answer #1

Solution :

Given that,

standard deviation = = 1.4

margin of error = E = 0.50

At 99% confidence level the z is ,

= 1 - 99% = 1 - 0.99 = 0.01

/ 2 = 0.01 / 2 = 0.005

Z/2 = Z0.005 = 2.576

Sample size = n = ((Z/2 * ) / E)2

= ((2.576 *1.4 ) / 0.50)2

= 52

**Minimum Sample size = 52**

**Option 2nd is correct**

determine the minimum sample size required when you want to be
95% confident that the sample mean is within 1.4 unites of the
population mean. Assume that the population is normally distributed
with standard deviation σ = 4.7
1. whats the critical value?
2. whats the margin of error?
3. whats the sample size?

Determine the minimum sample size required when you want to be
90% confident that the sample mean is within one unit of the
population mean and sigma=16.7. Assume the population is normally
distributed.

Determine the minimum sample size required when you want to be
95% confident that the sample mean is within 1.2 unites of the
population mean. Assume that the population is normally distributed
with standard deviation σ = 4.8.
1. The critical value:
1.9600
2. The margin of error:
Incorrect.
Tries 3/5
Previous Tries
3. The sample size:
62

Determine the minimum sample size required when you want to be
95% confident that the sample mean is within one unit of the
population mean and sigma=19.1. Assume the population is normally
distributed.
A 95 % confidence level requires a sample size of __

Determine the minimum sample size required when you want to be
95% confident that the sample mean is within one unit of the
population mean and sigmaequals13.7. Assume the population is
normally distributed. A 95 % confidence level requires a sample
size of nothing. (Round up to the nearest whole number as
needed.)

(CO6) Determine the minimum sample size required when you want
to be 75% confident that the sample mean is within fifteen units of
the population mean. Assume a population standard deviation of
327.8 in a normally distributed population
1293
785
632
1835
(CO6) Market research indicates that a new product has the
potential to make the company an additional $3.8 million, with a
standard deviation of $1.7 million. If this estimate was based on a
sample of 10 customers from...

Assume that a population data is normally distributed with
standard deviation of 1.4. Determine the minimum sample size
required when you want to be 99% confident that the sample mean is
within two units of the population mean.

Determine the required sample size if you want
to be 99% confident that the sample proportion is within 2% of the
population proportion if no preliminary estimate
of the true population is available.

if
you want to be 99% confident of estimating the population mean to
within a sampling error of + or - 4 and the standard deviation is
assumed to be 13, what sample size is required?

If you want to be 99% confident of estimating the population
mean to within a sampling error of plus or minus 6 and the standard
deviation is assumed to be 20, what sample size is required?

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 5 minutes ago

asked 12 minutes ago

asked 17 minutes ago

asked 25 minutes ago

asked 27 minutes ago

asked 30 minutes ago

asked 50 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago