Question
In: Statistics and Probability
A random sample from a normal population is obtained, and the data are given below. Find...
A random sample from a normal population is obtained, and the data are given below. Find a 90% confidence interval for . 114 157 203 257 284 299 305 344 378 410 421 450 478 480 512 533 545 What is the upper bound of the confidence interval (round off to the nearest integer)?
Solutions
orchestra answered 1 year agoRelated Solutions
Assume that each sample is a simple random sample obtained from a population with a normal...
Assume that each sample is a simple random sample obtained from
a population with a normal distribution.
a. n= 93 mean=3.90968 s=0.51774 Construct a 99% confidence
interval estimate of the standard deviation of the population from
which the sample was obtained.
b. n=93 mean=4.09355 s=0.59194 Repeat part (a).
How do you find values on a chi-square table when the degrees of
freedom are a value not commonly found on standard chi-square
tables? (In this case, 92)
The following data is for a simple random sample taken from a normal population: 2.41 2.45...
The following data is for a simple random sample taken from a
normal population: 2.41 2.45 2.21 2.32 2.25 2.38
(a) Find a 95% prediction interval.
(b) Find a tolerance interval that contains 90% of the data with
95% confidence
The following data is for a simple random sample taken from a normal population: 2.41 2.45...
The following data is for a simple random sample taken from a
normal population: 2.41 2.45 2.21 2.32 2.25 2.38
(a) Find a 95% prediction interval.
(b) Find a tolerance interval that contains 90% of the data with
95% confidence
Assume that the sample is a simple random sample obtained from a normally distributed population of...
Assume that the sample is a simple random sample obtained from a
normally distributed population of IQ scores of statistics
professors. Use the table below to find the minimum sample size
needed to be 99% confident that the sample standard deviation s is
within 1% of sigma. Is this sample size practical?
sigma To be 95% confident that s is within 1% 5% 10% 20%
30% 40% 50%
of the value of sigma, the sample size n should be at...
Suppose a simple random sample from a normal population yields the following data: x1 = 20,...
Suppose a simple random sample from a normal population yields
the following data: x1 = 20, x2 = 5, x3 = 10, x4 = 13, x5 = 17, x6
= 18. Find a 95% confidence interval for the population mean μ.
A. [11.53, 16.13] B. [10.03, 17.63] C. [9.32, 18.34] D. [7.91,
19.75] E. other value
SHOW WORK
A sample of n = 9 scores is obtained from a normal population distribution with σ...
A sample of n = 9 scores is obtained from a normal
population distribution with σ = 12. The sample mean is M
= 60.
a. With a two-tailed test and α = .05, use the sample data to
test the hypothesis that the population mean is μ = 65.
b. With a two-tailed test and α = .05, use the sample data to
test the hypothesis that the population mean is μ = 55.
c. In parts (a) and...
The sample variance of a random sample of 50 observations from a normal population was found...
The sample variance of a random sample of 50 observations from
a normal population was found to be s2 = 80. Can we
infer at the 1% significance level (i.e., a = .01) that the
population variance is less than 100 (i.e., x < 100) ?
Repeat part a changing the sample size to 100
What is the affect of increasing the sample size?
Find the p-value, Part I. An independent random sample is selected from an approximately normal population...
Find the p-value, Part I. An independent random sample is
selected from an approximately normal population with an unknown
standard deviation. Find the p-value for the given set of
hypotheses and T test statistic. Also determine if the null
hypothesis would be rejected at α = 0.05. (a) HA :μ>μ0,n=11,T
=1.91 (b) HA :μ<μ0,n=17,T =−3.45 (c) HA :μ?μ0,n=7,T =0.83 (d) HA
:μ>μ0,n=28,T =2.13
Find the p-value, Part I. An independent random sample is selected from an approximately normal population...
Find the p-value, Part I. An independent random sample is
selected from an approximately normal population with an unknown
standard deviation. Find the p-value for the given set of
hypotheses and T test statistic. Also determine if the null
hypothesis would be rejected at α = 0.05. (a) HA :μ>μ0,n=11,T
=1.91 (b) HA :μ<μ0,n=17,T =−3.45 (c) HA :μ?μ0,n=7,T =0.83 (d) HA
:μ>μ0,n=28,T =2.13
Given a population in which p = 0.6 and a random sample from this population of...
Given a population in which p = 0.6 and a random sample from
this population of size 100, find
a. the mean of the sampling distribution (for this
proportion)
b. the standard deviation of the sampling distribution (for this
proportion)
c. ?(?̂≤ 0.58) =
d. ?(?̂≥ 0.65) =
e. ?(0.58 ≤ ?̂ ≤ 0.65) =
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