Question

Construct a 90%confidence interval estimate for the population means given the values below.

x=290 |
σ=67 |
n=279 |

Answer #1

Construct a 90% confidence interval to estimate the population
mean using the data below.
x? = 90
? = 10
n = 30
N = 300
The? 90% confidence interval for the population mean is?
(_,_).

Construct the confidence interval for the population mean
μ.
c=0.90, x=16.1, σ=8.0, and n=85
A 90% confidence interval for
μ is ( , ).
(Round to one decimal place as needed.)

Construct a 90% confidence interval to estimate the population
mean when x =62 and s =13.5 for the sample sizes below.
a)
n=20
b)
n=40
c)
n=60
a) The 90% confidence interval for the population mean when
n=20 is from a lower limit of nothing to an upper limit of nothing.
(Round to two decimal places as needed.)

Construct a 90% confidence interval to estimate the population
mean using the accompanying data. What assumptions need to be made
to construct this interval?
x= 55 σ= 11 n=16
What assumptions need to be made to construct this
interval?
A. The sample size is less than 30.
B. The population must be normally distributed.
C. The population is skewed to one side.
D. The population mean will be in the confidence interval.

Construct a 95% confidence interval to estimate the population
proportion using the data below. x=23 n=80 N=500 The 95%
confidence interval for the population proportion is
The 95% confidence interval for the population proportion is
:

Construct a confidence interval of the population proportion at
the given level of confidence. x=160, n =200, 90 % confidence The
lower bound is ____. The upper bound is ____.

Construct a 90% confidence interval estimate for the difference
between two population means given the following sample data
selected from two normally distributed populations with equal
variances:
Sample 1 Sample 2
29
25 31
42 39
38
35
35 37
42 40
43
21
29
34
46 39
35

Construct a 90% confidence interval estimate for the difference
between two population means given the following sample data
selected from two normally distributed populations with equal
variances: Use SPSS
Sample
1
Sample 2
29
25 31
42 39
38
35 35
37
42 40
43
21
29
34
46
39

Construct a 90% confidence interval of the population
proportion using the given information. x=40, n=200
The lower bound is?
The upper bound is?
(round to three decimal places as needed)

Determine the sample size n needed to construct a 90?%
confidence interval to estimate the population mean when
? = 48 and the margin of error equals 8.
n =

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