Question

The mean chicken weight is 5lb, with a std dev of 1 lb. We want to take a simple random sample of 100 chickens.

- What is the probability that the sample mean is between 4.9 and 5.1 lb?
- What is the probability that the combined weight of the chickens between 490 and 510 lb?
- Find the value a, such that the combined weight exceeds a with probability 95%.
- Find the value b, such that the combined weight is below b with probability 99%.
- and similar questions

Answer #1

1. The weights of a certain brand of candies are normally
distributed with a mean weight of 0.8542 g and a standard deviation
of 0.0521 g. A sample of these candies came from a package
containing 454 candies, and the package label stated that the net
weight is 387.3 g. (If every package has 454 candies, the mean
weight of the candies must exceed 387.3 Over 454= 0.8531
g for the net contents to weigh at least 387.3 g.) a. If...

You want to estimate the mean weight of quarters in circulation.
A sample of 50 quarters has a mean weight of 5.638 grams and a
standard deviation of 0.066 gram. Use a single value to estimate
the mean weight of all quarters Also find the 95% confidence
interval for the average weight of all quarters.
The estimate for the mean of all quarters is__grams (Round to
three deci,al as needed) Find the 95% confidence interval for the
mean weight of...

Assume that you want to test the hypothesis that the mean weight
of the male student population is 160 lbs.
If we assume that the standard deviation has a known value of 12
lbs and we want to test with a confidence level of 95%
a. What sample size should we use if we want one to have a
probability of making a type II error of no more than 5% in the
test when the actual mean is 162...

Assume that a simple random sample has been selected from a
normally distributed population. We want to test the claim that for
the population of female college students at a particular
university, the mean weight is given by μ=155lb. The sample data
are summarized as follow: n=20, x=160lb, and s=18.5 lb. Use a
significant level of α=0.5. a. Identify the relevant variable and
parameter b. State null and alternative hypothesis c. Find the test
statistic value d. Find and interpret...

Cable Strength As a reminder, here again is the example from the
previous page. A group of engineers developed a new design for a
steel cable. They need to estimate the amount of weight the cable
can hold. The weight limit will be reported on cable packaging. The
engineers take a random sample of 45 cables and apply weights to
each of them until they break. The mean breaking weight for the 45
cables is xbar =768.2 lb. The standard...

Scenario 3: t-test Analysis
Paired Samples
Statistics
Mean
N
Std. Deviation
Std. Error Mean
Pair 1
T1 Scale of student's mathematics
utility
-.0096
16021
.99040
.00782
T2 Scale of student's mathematics
utility
.0059
16021
1.00682
.00795
Paired Samples
Correlations
N
Correlation
Sig.
Pair 1
T1 Scale of student's mathematics
utility & T2 Scale of student's mathematics utility
16021
.285
.000
Paired Samples
Test
Paired Differences
t
df
Sig. (2-tailed)
Mean
Std. Deviation
Std. Error Mean
95% Confidence Interval of the...

QUESTION 1
The weight of cans of Salmon is normally distributed with mean μ
9.92 and the standard deviation is σ0.285. We draw a random sample
of n= 64 cans. What is the sample Error?
Tip: sample error = σ/sqrt(n) and answer with 4 decimals.
QUESTION 2
The weigh of cans of salmon is randomly distributed with mean
=13 and standard deviation = 1.826. sample size is 38. What is the
z-value if we want to have the sample mean...

1A) An experiment was designed to estimate the mean difference
in weight gain for pigs fed ration A as compared with those fed
ration B. Eight pairs of pigs were used. The pigs within each pair
were litter-mates. The rations were assigned at random to the two
animals within each pair. The gains (in pounds) after 45 days are
shown in the following table. Assuming weight gain is normal, find
the 95% confidence interval estimate for the mean of the...

A fitness company is building a 20-story high-rise. Architects
building the high-rise know that women working for the company have
weights that are normally distributed with a mean of 143 lb and a
standard deviation of 29 lb, and men working for the company have
weights that are normally distributed with a mean of 173 lb and a
standard deviation or 35 lb. You need to design an elevator that
will safely carry 20 people. Assuming a worst case scenario...

(7) A new drug is developed to treat headache, and we want to
compare its performance with an existing drug. The performance
measure here is the time from taking the drug to people start to
feel better. A random sample of volunteers were collected, in one
occasion of headache, these people use one of the drug, and then in
another occasion of headache (there is a long time between
occasions), these volunteers use the other drug. Assuming all
variables are...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 9 minutes ago

asked 10 minutes ago

asked 20 minutes ago

asked 27 minutes ago

asked 35 minutes ago

asked 36 minutes ago

asked 36 minutes ago

asked 41 minutes ago

asked 43 minutes ago

asked 44 minutes ago

asked 59 minutes ago

asked 1 hour ago