I NEED HELP WITH ALL PARTS PLEASE: 1) As part of the National Health and Nutriti
ID: 2934103 • Letter: I
Question
I NEED HELP WITH ALL PARTS PLEASE:
1)
As part of the National Health and Nutrition Examination Survey, subjects were asked how many hours they slept the preceding night (rounded to the nearest hour). What level of measurement would classify the data? Select one:
a. Ordinal
b. Interval
c. Nominal
d. Ratio
2)
Listed below are measured amounts (grams per serving) of sugar in a sample of beverages. Find the sum of the mean and the median.
0, 8, 22, 5, 2, 16, 0, 8
3)
There are about 4200 college presidents in the United States, and they have annual incomes with a distribution that is skewed instead of being normal. Many different samples of 40 college presidents are randomly selected, and the mean annual income is computed for each sample. What is the approximate shape of the sample means? Select one:
a. Normal
b. Uniform
c. Bimodal
d. Skewed
4) Assume that cans of Coke are filled so that the actual amounts have a mean of 12.00 oz and a standard deviation of 0.11 oz. What is the probability that a 6 pack of random Coke cans have a mean of at least 12.10 oz.
5) In a survey, 54% of adults with smartphones admit to using them during meetings or classes. If 20 adult smartphone users are randomly selected, what is the probability that exactly 15 of them use their smartphones in meetings or classes?
6) About 75% of the U.S. population uses some type of vision correction (e.g., glasses or contact lenses). If four different people are randomly selected, what is the probability that they all use vision correction?
7) The prediction errors (in minutes) for the Old Faithful geyser that are differences between actual and predicted eruption times have a mean of 1 minute and a standard deviation of 7.86 minutes. What z score corresponds to a prediction error of 0?
8) A study found that the heights of basketball players had a mean of 81 inches with a 90% confidence interval between 74 and 88 inches. What is the correct interpretation of the confidence interval? Select one:
a. There is a 90% chance that the true mean height of basketball players is 81 inches
b. There is a 90% chance that the true value of the mean height of basketball players will fall between 74 and 88
c. There is a 90% chance that the interval between 74 and 88 inches contains the true value of the mean height of basketball players
d. 90% of basketball players have heights between 74 and 88 inches
9) For the next five questions base you answers on the following: The planets of the solar system have the numbers of moons listed below in order from the sun.
0 0 1 2 17 28 21 8
10) Find the mean (round to one decimal place)
11) Find the median
12) Find the mode
13) Find the sample standard deviation (round to 2 decimal places)
14) Given that Pluto has 5 moons, what is the corresponding z score given the data above?
15) Base your answers to the following 6 questions on the following scenario
A biologist is interested in the size distribution of Chinook salmon in North America. On a fishing trip to southern Alaska, he plans to collect animals using a large gill net (a net with openings of 9 square centimeters) where fish that swim into the net and are too big to pass through the net and are too big to pass through get stuck as they try to retreat and are caught by their gills.
What is the population of interest
Select one:
a. Large Chinook Salmon
b. Chinook salmon
c. Alaskan Chinook salmon
d. North American Chinook salmon
Individuals will be collected independently using this approach.
Select one:
True
False
The biologist will obtain a random sample of Chinook salmon.
Select one:
True
False
What population has the biologist sampled?
Select one:
a. Southern Alaskan Chinook Salmon
b. North American Chinook Salmon
c. Southern Alaskan Chinook Salmon bigger than 9cm
d. North American Chinook Salmon bigger than 9 cm
If the sizes of Chinook salmon are normally distributed with a mean of 22.3 cm with a standard deviation of 5.4 cm, what is the probability of randomly sampling an individual greater than 25 cm?
If the sizes of Chinook salmon are normally distributed with a mean of 22.3 cm with a standard deviation of 5.4 cm, what is the probability of randomly sampling 5 salmon with a mean size between 20 and 25 cm?
Use the following information to answer the next 3 questions
Listed below are amounts of strontium-90 (in millibecquerels, or mBq) in a simple random sample of baby teeth obtained from Pennsylvania residents born after 1979. Use the given data to construct a boxplot. Be sure to identify the median, first and third quartiles, and any outliers.
128 130 133 137 138 142 142 144 147 149 151 151 151 155 156 161 163 163 166 172
Compute the median
Compute the first quartile
Compute the third quartile.
Use the following information to answer the next three questions
The birth weights of males have a mean of 7.21 lbs and a standard deviation of 1.8 lbs. The birth weights of a sample of females have a mean 3037.1 g and a standard deviation of 706.3 g.
Which sex is more variable in their birth weights; males or females?
Select one:
a. males
b. females
What is the probability that a randomly selected female has a birth weight greater than 3272g?
What is the probability that 3 randomly selected males have a mean birth weight less than 6.7 lbs?
A committee of 5 people is to be formed randomly from a group of 10 women and 6 men. Find the probability that the committee has: 3 women and 2 men
A committee of 5 people is to be formed randomly from a group of 10 women and 6 men. Find the probability that the committee has: 4 women and 1 man
A committee of 5 people is to be formed randomly from a group of 10 women and 6 men. Find the probability that the committee has: at least 3 women
Explanation / Answer
(According to Chegg policy, only four subquestions will be answered. Please post the remaining in another question)
1) As part of the National Health and Nutrition Examination Survey, subjects were asked how many hours they slept the preceding night (rounded to the nearest hour). What level of measurement would classify the data? Select one:
Since the value can only be in the range 0..24, the answer is:
b. Interval
2) Listed below are measured amounts (grams per serving) of sugar in a sample of beverages. Find the sum of the mean and the median.
0, 8, 22, 5, 2, 16, 0, 8
Sorting data
=> 0, 0, 2, 5, 8, 8, 16, 22
Median = (5 + 8) / 2 = 6.5
Mean = (0 + 0 + 2 + 5 + 8 + 8 + 16 + 22) / 8 = 7.625
Sum of mean and median = 6.5 + 7.625 = 14.125.
3) There are about 4200 college presidents in the United States, and they have annual incomes with a distribution that is skewed instead of being normal. Many different samples of 40 college presidents are randomly selected, and the mean annual income is computed for each sample. What is the approximate shape of the sample means? Select one:
a. Normal
This result follows from the central limit theorem.
4) Assume that cans of Coke are filled so that the actual amounts have a mean of 12.00 oz and a standard deviation of 0.11 oz. What is the probability that a 6 pack of random Coke cans have a mean of at least 12.10 oz.
x' = 12.10 ? = 12.00 ? = 0.11 n = 6
x' = ? + z?/?n
=> 12.10 = 12.00 + z * 0.11 / ?6
=> z = 0.1 * ?6 / 0.11 = 2.2268.
Probability (right tailed) from z table = 0.0130.
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