# Ans Doc455

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Explain how to find the critical values for a t-sampling distribution.
LOADING… Click the icon to view the t-distribution table
Give the first step. Choose the correct answer below.
A.
Identify the level of significance Start Fraction alpha Over 2 EndFraction
α
2 and the degrees of freedom, d.f. equals=nminus−1.
B.
Identify the level of significance Start Fraction 1 minus alpha Over 2 EndFraction
1−α
2 and the degrees of freedom, d.f.equals=n.
C.
Identify the level of significance alphaα and the degrees of freedom, d.f.equals=nminus−1.
D.
Identify the level of significance 1minus−alphaα and the degrees of freedom, d.f.equals=n.
Find the critical value(s) using the t-distribution table in the row with the correct degrees of freedom.
If the hypothesis test is left-tailed, use the

“One tail comma Start Fraction alpha Over 2 Infraction “”One tail,
α
2”
“One tail comma alpha “”One tail, α”
“Two tails comma Start Fraction alpha Over 2 EndFraction “”Two tails,
α
2”
“Two tails comma alpha “”Two tails, α”
column with a

negative
positive
negative and a positive
sign.
If the hypothesis test is right-tailed, use the

“One tail comma alpha “”One tail, α”
“One tail comma StartFraction alpha Over 2 EndFraction “”One tail,
α
2”
“Two tails comma alpha “”Two tails, α”
“Two tails comma StartFraction alpha Over 2 EndFraction “”Two tails,
α
2”
column with a

negative
positive
negative and a positive
sign.
If the hypothesis test is two-tailed, use the

“Two tails comma StartFraction alpha Over 2 EndFraction “”Two tails,
α
2”
“Two tails comma alpha “”Two tails, α”
“One tail comma alpha “”One tail, α”
column with a

negative
positive
negative and a positive
sign.
for above question give me answer by line (row)
Karl and Leonard want to make trail mix.. In order to get the right balance of ingredients for their tastes they bought 4 pounds4 pounds of raisins at \$ 3.36\$3.36 per pound, 5 pounds5 pounds of peanuts for \$ 4.54\$4.54 per pound, and 5 pounds of chocolate chips for \$ 4.62per pound. Determine the cost per pound of the trail mix.
The cost per pound of the trail mix is \$
nothing. (Round to the nearest cent.)
Enter your answer in the answer box.
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Suppose 6060% of kids who visit a doctor have a fever, and 2020% of kids with a fever have sore throats. What’s the probability that a kid who goes to the doctor has a fever and a sore throat?
The probability is
nothing.
(Round to three decimal places as needed.)
A standard deck of cards contains 52 cards. One card is selected from the deck.
(a)
Compute the probability of randomly selecting aa kingking or fivefive.
(b)
Compute the probability of randomly selecting aa kingking or fivefive or twotwo.
(c)
Compute the probability of randomly selecting aa queenqueen or heartheart.
The regionregion of a country with the longest life expectancyof a country with the longest life expectancy for the past six years isfor the past six years is shown below.
EasternEastern
NorthwestNorthwest
SouthernSouthern
EasternEastern
NorthernNorthern
SouthernSouthern
Determine whether the data are qualitative or quantitative and identify the data set’s level of measurement.
Suppose a survey of 523523 women in the United States found that more than 5555% are the primary investor in their household. Which part of the survey represents the descriptive branch of statistics? Make an inference based on the results of the survey.
Choose the best statement of the descriptive statistic in the problem.
A.
There is an association between U.S. women and being the primary investor in their household.
B.
5555% of women in the sample are the primary investor in their household.
C.
There is an association between the 523523 women and being the primary investor in their household.
D.
523523 women were surveyed.
Choose the best inference from the given information.
A.
523523 women were surveyed.
B.
There is an association between the 523523 women and being the primary investor in their household.
C.
5555% of women in the sample are the primary investor in their household.
D.
There is an association between U.S. women and being the primary investor in their household.
B. 55% of women in the sample are the primary investor in their household.
D. There is an association between U.S. women and being the primary investor in their household.
The lengths of the first 10 words of 2 books are listed below. Find the range, variance, and standard deviation for each of the two samples, then compare the two sets of results. Does there appear to be a difference in variation?
Book 1: 4 4 5 4 2 6 2 6 5 44 4 5 4 2 6 2 6 5 4
Book 2: 4 2 4 11 2 3 3 6 12 64 2 4 11 2 3 3 6 12 6
Find the range for book 1.
Rangeequals=
nothing letters
Find the range for book 2.
Rangeequals=
nothing letters
Find the sample variance and sample standard deviation for book 1.
Sample variance equals=
nothing letterssquared2 (Round to one decimal place as needed.)
Sample standard deviation equals=
nothing letters
(Do not round until the final answer. Then round to one decimal place as needed.)
Find the sample variance and sample standard deviation for book 2.
Sample variance equals=
nothing letterssquared2 (Round to one decimal place as needed.)
Sample standard deviation equals=
nothing letters
(Do not round until the final answer. Then round to one decimal place as needed.)
Is there a difference in variation between the two books?
A.
No, there is not a difference in the variation.
B.
Yes, there is much less variation among the word lengths in book 2book 2.
C.
Yes, there is much less variation among the word lengths in book 1book 1.
Click to select your answer(s).
Explain the difference between the z-test for muμ using rejection region(s) and the z-test for muμ using a P-value.
Choose the correct answer below.
A.
The z-test using rejection region(s) is used when the population is normal. The z-test using a P-value is used when the population is not normal.
B.
The z-test using rejection region(s) is used when the population is not normal. The z-test using a P-value is used when the population is normal.
C.
In the z-test using rejection region(s), the test statistic is compared with the level of significance alphaα. The z-test using a P-value compares the P-value with the critical values.
D.
In the z-test using rejection region(s), the test statistic is compared with critical values. The z-test using a P-value compares the P-value with the level of significance alphaα.
An insurance company crashed four cars of the same model at 5 miles per hour. The costs of repair for each of the four crashes were \$428428, \$404404, \$472472, and \$231231 . Compute the mean, median, and mode cost of repair.
Compute the mean cost of repair. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A.
The mean cost of repair is \$
nothing. (Round to the nearest cent as needed.)
B.
The mean does not exist.
Compute the median cost of repair. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A.
The median cost of repair is \$
nothing. (Round to the nearest cent as needed.)
B.
The median does not exist.
Compute the mode cost of repair. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A.
The mode cost of repair is \$
nothing. (Round to the nearest cent as needed.)
B.
The mode does not exist.
Click to select and enter your answer(s).
Mean = 383.75
Median = 416
Mode = Does not exist
A company gave psychological tests to prospective employees. The random variable x represents the possible test scores. Use the histogram to find the probabilities in parts (a) and (b).
Test scores
0
1
2
3
4
0
0.1
0.2
0.3
0.4
Probability
0.05
0.28
0.34
0.25
0.08
(Round to two decimal places as needed.)  (a) Find the probability that a person selected at random from the survey’s sample had a test score of more than two.nothing
(Round to two decimal places as needed.)  (b) Find the probability that a person selected at random from the survey’s sample had a test score of less than four.nothing