Question

Sample Data:90,90,94,105,114,143,143,150,152,156,160,166,172,176,178,180,193,202,202,204,217,220,240,255,278,312,333,346,348,523

Probability that a single random person selected in your sample would weigh between 200 and 250 pounds.

Please help, show steps.

Answer #1

pls upvote...!!!

Ch 5 Statistics Binomial Probability/Poisson Probability For
full credit, show your work step by step and circle your final
answer. Then Upload in Blackboard (you can do just one time) (Round
the final answer to 4 decimal digits)
2. The lengths of pregnancies are normally distributed with a
mean of 273 days and a standard deviation of 20 days. If 50 women
are randomly selected, find the probability that they have a mean
pregnancy between 273 days and 275 days....

The following table shows a random sample of 200 students and
their majors.
If one person was chosen at random, find the probability. Enter
your answer as a reduced fractions or a percent, rounded to the
nearest tenth of a percent.
English
History
Science
Total
Female
45
38
27
110
Male
12
52
26
90
Total
57
90
53
200
a. that the person is male
b. that the person is a Science major
c. that the person is male...

DHL recently selected a random sample of packages and weigh
them. The weights for the samples are given below.
Use Excel to develop a frequency distribution using classes
having equal widths.
Use Excel to develop a relative frequency and a cumulative
relative frequency distribution for the weights using the same
classes created in part b.
What percent of the sampled crates have weights greater than 96
pounds?
DHL
89
91
86
93
94
91
95
83
84
92
80
88...

4. Select a random sample of data from your dataset. The data
should have a minimum of 30 cases, but not more than 200 cases.
(Hint: You can use the “random” function in either Excel or SPSS to
generate a random sample from your dataset.)
Living arrangement
Sense of isolation
Housing development
Integrated Neighborhood
Totals
Low
80
30
110
High
20
120
140
Totals
100
150
250

Let ?̅ be the sample mean of a continuous random variable ? for
a sample with n ≥ 30 observations. Explain in your words how to
compute the probability that the sample mean, ?̅, falls between two
real values, ? and ?, with ? < ?, i.e.
Prob(? ≤ ?̅≤ ?)
Specify carefully all the assumptions you make and describe all
the steps implemented.
Please show All working out

A machine is shut down for repairs if a random sample of 200
items selected from the daily output of the machine reveals at
least 15% defectives. (Assume that the daily output has a large
number of items.) If on a given day, the machine is producing only
10% defective items, what is the probability that it will be shut
down? State and justify a condition that is required to apply a
normal approximation to this binomial probability.

A survey of 200 people included questions about age and whether
or not the person had any tattoos. The data for these two questions
are summarized in the table below. Use the table to answer the
questions that follow.
Age
# With Tattoo
# With No Tattoo
Totals by Age
18 to 24
14
48
62
25 to 29
12
29
41
30 to 39
8
13
21
40 to 49
9
22
31
50 to 64
3
22
25...

A random sample of 130 adult males was selected as part of a
study on weight loss. The average weight at the beginning of the
study was 265 pounds with a standard deviation of 22 pounds.
Assuming the weight is normally distributed, provide a 99%
confidence interval for the mean weight at the start of the study.
You MUST show your work to receive full credit.

Ch.3: Random Variable: nd Probability Distributions Class
Exercise - A: The data from 200 endothermic reac ns involving
sodium bicarbonate are summarized as follows: Final Temperature
Conditions 266 K(48) 271 K(60) 274 K(92) Number of Reactions 48 60
92 Calculate the probability mass function of final temperature
Ch.3: Random Variable, and Probability Distributions Class
Exercise - B:
Determine the cumulative distribution function for the random
variable in Exercise A (In the previous slide)
Show the plot for this Cumulative Distribution...

A random sample of size 9 is selected from a certain
population.
(i) Calculate, by hand, the probability that exactly eight of
the nine selected values lie above the population median. Show your
working.
(ii) Calculate, by hand, the probability that at least eight of
the nine selected values lie above the population median. Again,
show your working.

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