Need help with this stats/probability question. Please and thank you! Question: Suppose the distribution of alumni...
Need help with this stats/probability question. Please
and thank you!
Question:
Suppose the distribution of alumni salary has a mean of $55k per year and a standard deviation of $5k. The research office collected salary information from 121 business alumni. Its collected data show that the mean salary of their first job is $58k per year.
- What is the sample size and standard error of the data collected?
- What is the probability that the sampled alumni have a mean salary of $58k or more?
Homework Answers
Below are the null and alternative Hypothesis,
Null Hypothesis: μ = 55
Alternative Hypothesis: μ > 55
a)
xbar = 58
std. error = 5/sqrt(121) = 0.4545
b)
z = (xbar - mu)/(sigma/sqrt(n))
z = (58 - 55)/(5/sqrt(121))
z = 6.6
P(z > 6.6) = 0.0000
Add Answer to:
Need help with this stats/probability question. Please
and thank you!
Question:
Suppose the distribution of alumni...
Suppose that the standard deviation of the collected data from 121 alumni is $3k and the...
Suppose that the standard deviation of the collected data from 121 alumni is $3k and the mean is $60k, please estimate the confidence interval of the population’s average salary?
Need typed answer only. Do not provide hand written solution The dean has observed for several...
Need typed answer only. Do not provide hand written solution The dean has observed for several years and found that the probability distribution of the salary of the alumni's first job after graduation is normal, with a mean of $56k per year and a standard deviation of $4k. a. What's the probability that the alumni get a salary of $52k or more in their first jobs? b. What's the change that the alumni get a salary between $40k and $60k?...
Help with question 10 please and thank you. Question 10 14 pts Suppose X is a...
Help with question 10 please and thank you.
Question 10 14 pts Suppose X is a random variable with mean 100 and standard deviation 15. Suppose that we select random samples of size n = 81 to construct a sampling distribution of means. Then which of the following is NOT true? O The standard deviation of the sampling distribution is 15/9 The mean of the sampling distribution is 100 Given enough samples, the shape of the sampling distribution will be...
I need some help on this question for my stats homework, any help is appreciated! Thank...
I need some help on this question for my stats homework, any
help is appreciated! Thank you!
Question:
For 3 and 4, find the sample size needed to give the desired margin of error in estimating a population proportion with the indicated level of confidence. 3. A margin of error within plus or minus 3% with 90% confidence. The sample proportion was 0.3.
I need help with stats еBook Annual starting salaries for college graduates with degrees in business...
I need help with stats
еBook Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $10,000 and $45,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired. a. What is the planning value for the population standard deviation? b. How large a sample should be taken if the desired margin of error is $300? Round your answer to next whole number. $150? $110? c. Would...
i need help thank you 1. A shopping mall estimates the probability distribution of the number...
i need help thank you
1. A shopping mall estimates the probability distribution of the number of stores mall customers actually enter, as shown in the table x 0 1 2 3 4 5 6 7 8 P(x) 0.05 0.07 0.12 0.15 0.2 0.13 0.11 0.1 0.07 a. Find the mean and standard deviation of the number of stores entered. (10%) b. Refer to Question a Suppose that, on average, customers spend 10 in each store they enter. Find the...
5.4.1 Question Help A population has a mean = 141 and a standard deviation o =...
5.4.1 Question Help A population has a mean = 141 and a standard deviation o = 28. Find the mean and standard deviation of the sampling distribution of sample means with sample size n = 40. The mean is :-), and the standard deviation is 0;=0 (Round to three decimal places as needed.) 5.4.2 Question Help A population has a meanu - 74 and a standard deviation = 8. Find the mean and standard deviation of a sampling distribution of...
Suppose we had found that the variable giving the amount of grant money raised by the charity in ...
please explain related concept in detail for better
understansing.
Suppose we had found that the variable giving the amount of grant money raised by the charity in the last year follows a right skewed distribution with mean equal to $500,000 and standard deviation equal to $850,000. This is hypothetical. We did not actually measure the variable. We look at the average amount of grant money raised by 40 randomly sampled charities from the charity navigator website. 2. Describe the shape...
And insurance office records the number of claims X receive each day in build a probability...
And insurance office records the number of claims X receive
each day in build a probability distribution table below using the
data collected find the mean and standard deviation of a
probability distribution
bunding Numbers Calcular OneStop Austin Peay State! + V com/learn/course/Saala356-2cd6-404-9700-47b203f81404/assignment/a51937c3-46f1-4589-b631-603d8b14d117 Calculate Mean and Standard Deviation for a Discrete Probability Distribution Using Technology - Calculator Question An insurance office records the number of claims, X, received each day and built the probability distribution tak using the data collected....
Please help with this question Thank you 4.4722 10.10 According to a paper by Sokal and...
Please help with this question
Thank you
4.4722 10.10 According to a paper by Sokal and Hunter published in the Annals of the Entomological Society of America in 1955, wing lengths were measured for a sample of 100 houseflies. The data were used to produce a 95% confidence interval; lengths were recorded in millimeters. Variable N Mean St Dev SE Mean 95.0% CI length 100 4.5500 0.3920 0.0392 ( 4.4722, 4.6278) a. Report the sample mean wing length. 4661278 b....
Help with question 10 please and thank you.
Question 10 14 pts Suppose X is a random variable with mean 100 and standard deviation 15. Suppose that we select random samples of size n = 81 to construct a sampling distribution of means. Then which of the following is NOT true? O The standard deviation of the sampling distribution is 15/9 The mean of the sampling distribution is 100 Given enough samples, the shape of the sampling distribution will be...
I need some help on this question for my stats homework, any
help is appreciated! Thank you!
Question:
For 3 and 4, find the sample size needed to give the desired margin of error in estimating a population proportion with the indicated level of confidence. 3. A margin of error within plus or minus 3% with 90% confidence. The sample proportion was 0.3.
I need help with stats
еBook Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $10,000 and $45,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired. a. What is the planning value for the population standard deviation? b. How large a sample should be taken if the desired margin of error is $300? Round your answer to next whole number. $150? $110? c. Would...
i need help thank you
1. A shopping mall estimates the probability distribution of the number of stores mall customers actually enter, as shown in the table x 0 1 2 3 4 5 6 7 8 P(x) 0.05 0.07 0.12 0.15 0.2 0.13 0.11 0.1 0.07 a. Find the mean and standard deviation of the number of stores entered. (10%) b. Refer to Question a Suppose that, on average, customers spend 10 in each store they enter. Find the...
5.4.1 Question Help A population has a mean = 141 and a standard deviation o = 28. Find the mean and standard deviation of the sampling distribution of sample means with sample size n = 40. The mean is :-), and the standard deviation is 0;=0 (Round to three decimal places as needed.) 5.4.2 Question Help A population has a meanu - 74 and a standard deviation = 8. Find the mean and standard deviation of a sampling distribution of...
please explain related concept in detail for better
understansing.
Suppose we had found that the variable giving the amount of grant money raised by the charity in the last year follows a right skewed distribution with mean equal to $500,000 and standard deviation equal to $850,000. This is hypothetical. We did not actually measure the variable. We look at the average amount of grant money raised by 40 randomly sampled charities from the charity navigator website. 2. Describe the shape...
And insurance office records the number of claims X receive
each day in build a probability distribution table below using the
data collected find the mean and standard deviation of a
probability distribution
bunding Numbers Calcular OneStop Austin Peay State! + V com/learn/course/Saala356-2cd6-404-9700-47b203f81404/assignment/a51937c3-46f1-4589-b631-603d8b14d117 Calculate Mean and Standard Deviation for a Discrete Probability Distribution Using Technology - Calculator Question An insurance office records the number of claims, X, received each day and built the probability distribution tak using the data collected....
Please help with this question
Thank you
4.4722 10.10 According to a paper by Sokal and Hunter published in the Annals of the Entomological Society of America in 1955, wing lengths were measured for a sample of 100 houseflies. The data were used to produce a 95% confidence interval; lengths were recorded in millimeters. Variable N Mean St Dev SE Mean 95.0% CI length 100 4.5500 0.3920 0.0392 ( 4.4722, 4.6278) a. Report the sample mean wing length. 4661278 b....
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago