Question
In: Statistics and Probability
I believe that the number of times a person will yawn in a day is normally...
I believe that the number of times a person will yawn in a day is normally distributed, with a standard deviation of 3. If I do a study of 36 random individuals, and they have an average of 12 daily yawns with a standard deviation of 3.6, find a 99% confidence interval for the standard deviation in the number of daily yawns for the population of all people.
Solutions
orchestra answered 2 years agoRelated Solutions
I believe the population mean number of times that adults ate fast food each week is...
I believe the population mean number of times that adults ate
fast food each week is 2.5. My data is after speaking to with 7 and
found that they ate fast food 1, 4, 0, 2, 4, 0 and 3 times last
week. I choose to test this hypothesis at .08 significance
level.
My hypothesis is: Ho: μ + = 2.5 HA : μ ≠ 2.5 n = 7
Calculate the p-value: 0.4738
Calculate the t-stat: = 0.764
Using the...
The percent of fat calories that a person in America consumes each day is normally distributed...
The percent of fat calories that a person in America consumes
each day is normally distributed with a mean of about 36 and a
standard deviation of about ten. Suppose that 16 individuals are
randomly chosen. a.) TRUE or FALSE: The random variable is defined
as the average percent of fat calories consumed each day by a
person in America. b.) For a sample of size 16, state the mean of
the sample mean. c.) For a sample of size...
The percent of fat calories that a person in America consumes each day is normally distributed...
The percent of fat calories that a person in America consumes
each day is normally distributed with a mean of about
40 and a standard deviation of
15 . Suppose that one individual is randomly chosen.
Let X= percent of fat calories.
In each appropriate box you are to enter either a rational
number in "p/q" format or a decimal value accurate to the nearest
0.01 .
(.25) X∼ (pick one) NBUE
( , )
.
(.25) The probability that a person consumes...
The percent of fat calories that a person in America consumes each day is normally distributed...
The percent of fat calories that a person in America consumes
each day is normally distributed with a mean of about 36 and a
standard deviation of about ten. Suppose that 16 individuals are
randomly chosen.
(a) For the group of 16, find the probability that the average
percent of fat calories consumed is more than thirty-five (Round to
3 decimal places)
(b) Find the first quartile for the percent of fat calories.
(c) Find the first quartile for the...
Are the mean number of times a month a person eats out the same for whites,...
Are the mean number of times a month a person eats out the same
for whites, blacks, Hispanics and Asians?
White
Black
Hispanic
Asian
6
4
7
8
8
1
3
3
2
5
5
5
4
2
4
1
6
6
7
df numerator and denominator =
Write Ho and Ha
What is the p-value?
Do you reject or accept the null hypothesis at the 5%
level?
According to a recent study, the number of times a person visits a doctor per year...
According to a recent study, the number of times a person visits
a doctor per year follows an approximately normal distribution with
a mean of 4.6 visits and a standard deviation of 0.8 visits. A tech
company wishes to offer their employees health insurance next year.
To find the best health insurance plan, the company randomly
selects employees and notes how many times they visited the doctor
last year. If the research resulted in a standard error of 0.025
visits,...
The number of gallons of paint that Home Depot sells in a given day is normally...
The number of gallons of paint that Home Depot sells in a given
day is normally distributed with a mean of 197 gallons and a
standard deviation of 45 gallons (I realize that the distribution
is probably different for weekends compared to weekdays, but just
assume everyday has the distribution). How many gallons of paint
have to be sold in a given day in order for that day to be in the
top 5% of the highest number of gallons...
The average number of miles a person drives per day is 24. A researcher wishes to...
The average number of miles a person drives per day is 24. A
researcher wishes to see if people over age 60 drive less than 24
miles per day. She selects a random sample of27 drivers over the
age of 60 and finds that the mean number of miles driven is 22.2.
The population standard deviation is miles 3.7. At a=0.05, is there
sufficient evidence that those drivers over 60 years old drive less
than 24 miles per day on...
How many ways can a person toss a coin 9 times so that the number of...
How many ways can a person toss a coin 9 times so that the
number of tails is between 5 and 7 inclusive?
How many ways can a person toss a coin 7 times so that the number of...
How many ways can a person toss a coin 7 times so that the
number of heads is between 4 and 6 inclusive?
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