Question

The mean number of sick days an employee takes per year is believed to be about ten. Members of a personnel department do not believe this figure. They randomly survey eight employees. The number of sick days they took for the past year are as follows: 12; 4; 15; 3; 11; 8; 6; 8. At the 0.05 significance level, test the claim of the personnel team, that the mean number of sick days per year is less than ten. Conclusion: There is sufficient evidence to support OR not support the claim?

Answer #1

The mean number of sick days an employee takes per year is
believed to be about 10. Members of a personnel department do not
believe this figure. They randomly survey 8 employees. The number
of sick days they took for the past year are as follows: 11; 5; 13;
4; 10; 9; 7; 8. Let X = the number of sick days they took
for the past year. Should the personnel team believe that the mean
number is about 10?...

The mean number of sick days an employee takes per year is
believed to be about 10. Members of a personnel department do not
believe this figure. They randomly survey 8 employees. The number
of sick days they took for the past year are as follows: 10; 5; 15;
5; 9; 10; 6; 9. Let X = the number of sick days they took
for the past year. Should the personnel team believe that the mean
number is about 10?...

The mean number of sick days an employee takes per year is
believed to be about 10. Members of a personnel department do not
believe this figure. They randomly survey 8 employees. The number
of sick days they took for the past year are as follows: 12; 5; 13;
4; 11; 9; 8; 10. Let X = the number of sick days they took for the
past year. Should the personnel team believe that the mean number
is about 10?...

A reseacher wishes to see if the average number of sick days a
worker takes per year is greater than 5. A random sample of 26
workers at a large department store had a mean of 5.2. The standard
deviation of the population is 1.3. Is there enough evidence to
support the researcher's claim at a = 0.05? Assume that the
variable is normally distributed. Use the critical value method
with tables. State the hypotheses and identify the claim with...

A researcher wishes to see if the average number of sick days a
worker takes per year is greater than 5. A random sample of 32
workers at a large department store had a mean of 5.6. Assume the
population standard deviation is 1.2. Test the claim that the
average number of sick days a worker takes per year is more than 5.
Use a 0.01 significance level.
a)State the claim and opposite symbolically.
b) State the Null and alternate...

A company is
interested in estimating μ, the mean number of days of
sick leave taken by its employees. Their statistician randomly
selects 100 personnel files and notes the number of sick days taken
by each employee. The sample mean is 12.2 days, and the sample
standard deviation is 10 days. How many personnel files would the
statistician have to select in order to estimate μ to
within 2 days with a 99 percent confidence interval?
Note: Sigma
Unknown
136...

Suppose that a company finds that the mean number of sick days
for their employees is 5.5 days/year with a standard deviation of
2.4 days/year. What is the probability that a sample of 30
employees finds a mean of at least 6.5 days/year?

Let X be the random variable giving the number of sick days
taken by the “typical” worker per year. Suppose that it is known
that E(X) = μ = 10, and that the standard deviation of X is σ = 2.
(both μ and σ are measured in days. A firm has n = 64 employees.
Consider these to be a random sample from the population of all
“typical” employees.
a) What is the approximate distribution of the average number...

(a) In an insurance company the average number of sick leaves
for an employee is 0.5 per month. The numbers of sick leaves in
different months are independent. Under appropriate assumptions
about the distribution, find the probability that the number of
sick leaves for an employee is at least four days in a year. Write
down and justify your assumptions.
(b) An insurance company has three different types of employees,
with 100 people of each type. Find the probability that...

A study was done to look at the relationship between number of
vacation days employees take each year and the number of sick days
they take each year. The results of the survey are shown below.
Vacation Days
0
1
4
9
13
13
15
1
6
9
Sick Days
9
12
10
5
5
1
0
6
4
6
Find the correlation coefficient: r=r= Round
to 2 decimal places.
The null and alternative hypotheses for correlation are:
H0:? r μ...

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