ACT scores are not exactly normally distributed but the normal distribution is very close match to...
ACT scores are not exactly normally distributed but the normal distribution is very close match to the histogram of ACT scores. How does this fact impact our ability to calculate probabilities about the average of 30 students ACT scores?
A. because ACT scores cannot exceed 36, we cannot use probabilities from the normal curve, which extends out to infinity.
B. because the sample size is relatively larger, we can only calculate probabilities for sums, not averages.
C. we need samples that are much larger than 30 when we deal with data that can be integers only.
D. because the sample size is relatively large and the data is quite close to normal, there is no impact.
Homework Answers
Add Answer to:
ACT scores are not exactly normally distributed but
the normal distribution is very close match to...
The standard deviation of SCHOLTEST scores for students at a particular college is 285 points. Two...
The standard deviation of SCHOLTEST scores for students at a particular college is 285 points. Two highly skilled data science students, Wai and Yemane, want to estimate the average SCHOLTEST score of students at this college. They determine their margin of error should be no larger than 20 points. (i) Yemane wants to use a 90 percent confidence interval. What minimum count value should her sample size equal? (ii) Wai wants to use a 99 percent confidence interval. Should the...
Creating and interpreting a Normal Quantile-Quantile (Normal Q-Q) plot. The data you will be usin...
Creating and interpreting a Normal Quantile-Quantile (Normal Q-Q) plot. The data you will be using is the distance in miles from home to campus for statistics students. 150 30 105 88 94 15 55 122 45 67 18 126 30 143 98 15 30 62 111 87 38 20 34 39 46 14 144 23 94 44 97 65 120 123 99 45 57 209 20 133 72 Column 1: Sort the data values from least to greatest. Use the...
25 Anormal population - 0 - 8. A random sample and scores from 54 Wurthe-wore for...
25 Anormal population - 0 - 8. A random sample and scores from 54 Wurthe-wore for this sample is population has a mean of 24. A random sample of 4 scares is obtained from a mal population with probability of obtaining met greater than 22 for this sample! - 20 and a t West - 20 the following samples is deur likely to be obtained For normal perelation with a Band for a sample of n = 4 X- 5...
True or False (1 point each) (Correct the ones that are false) The purpose of an interval estima...
True or False (1 point each) (Correct the ones that are false) The purpose of an interval estimate is to provide information about how close a point estimate, i.e. sample statistic, is to the population parameter. If the population standard deviation is unknown and cannot be estimated from historical data, an interval estimate for the population mean can be constructed by substituting the sample standard deviation and using the t distribution instead of the normal distribution. You cannot determine a...
4. The following frequency table shows the test score distribution for a random sample of 25...
4. The following frequency table shows the test score distribution for a random sample of 25 students taking an introductory statistics class at a certain college. a. Find the missing relative frequency b. How many students in the sample RelativeF 0.08 0.04 Score 30-40 41-51 52-62 63-73 74 -84 85-95 had a score of at least 63? Total number of students taking an introductory statistics class at this college is 800. Based on the sample data above, estimate the total...
Please m asking for assistance on statistics Q10. A population consists of the following N-5 scores:...
Please m asking for assistance on statistics
Q10. A population consists of the following N-5 scores: 0, 6, 4, 3, and 12 a. Compute u ando for the population b. Find the 2-score for each score in the population c. Transform the original population into a new population of N = 5 scores with a mean of u = 100 and a standard deviation of a = 20 Q11. For a sample with a mean of M = 51, a...
R studio #Exercise : Calculate the following probabilities : #1. Probability that a normal random variable...
R studio #Exercise : Calculate the following probabilities : #1. Probability that a normal random variable with mean 22 and variance 25 #(i)lies between 16.2 and 27.5 #(ii) is greater than 29 #(iii) is less than 17 #(iv)is less than 15 or greater than 25 #2.Probability that in 60 tosses of a fair coin the head comes up #(i) 20,25 or 30 times #(ii) less than 20 times #(iii) between 20 and 30 times #3.A random variable X has Poisson...
6. The sampling distribution of the sample proportion In 2007, about 30% of new-car purchases in ...
Please Help me to full the all
blank (11 blanks in total)
6. The sampling distribution of the sample proportion In 2007, about 30% of new-car purchases in California were financed with a home equity loan. [Source: "Auto Industry Feels the Pain of Tight Credit," The New York Times, May 27, 2008.] The ongoing process of new-car purchases in California can be viewed as an infinite population Define p as the proportion of the population of new-car purchases in California...
E) Deseribe the probabuiity histogram (symmetry, shape, center And the mean of this discrete rand...
c-f
on
this page
We were unable to transcribe this imagee) Deseribe the probabuiity histogram (symmetry, shape, center And the mean of this discrete random variable, Х. (Reminden This is asking you to find the mean or a random variable. .not a sample mean.) Show your 二つ、 e) Find the standard deviation of the random variable, X. (Reminder: This is asking you to find the standard deviation of a random variable...not a sample standard deviation.) Keep EXACT fractions throughout the...
Question 202.5 pts If we consider the simple random sampling process as an experiment, the sample...
Question 202.5 pts If we consider the simple random sampling process as an experiment, the sample mean is _____. Group of answer choices always zero known in advance a random variable exactly equal to the population mean Flag this Question Question 212.5 pts The basis for using a normal probability distribution to approximate the sampling distribution of x ¯ and p ¯ is called _____. Group of answer choices The Law of Repeated Sampling The Central Limit Theorem Expected Value...
25 Anormal population - 0 - 8. A random sample and scores from 54 Wurthe-wore for this sample is population has a mean of 24. A random sample of 4 scares is obtained from a mal population with probability of obtaining met greater than 22 for this sample! - 20 and a t West - 20 the following samples is deur likely to be obtained For normal perelation with a Band for a sample of n = 4 X- 5...
4. The following frequency table shows the test score distribution for a random sample of 25 students taking an introductory statistics class at a certain college. a. Find the missing relative frequency b. How many students in the sample RelativeF 0.08 0.04 Score 30-40 41-51 52-62 63-73 74 -84 85-95 had a score of at least 63? Total number of students taking an introductory statistics class at this college is 800. Based on the sample data above, estimate the total...
Please m asking for assistance on statistics
Q10. A population consists of the following N-5 scores: 0, 6, 4, 3, and 12 a. Compute u ando for the population b. Find the 2-score for each score in the population c. Transform the original population into a new population of N = 5 scores with a mean of u = 100 and a standard deviation of a = 20 Q11. For a sample with a mean of M = 51, a...
Please Help me to full the all
blank (11 blanks in total)
6. The sampling distribution of the sample proportion In 2007, about 30% of new-car purchases in California were financed with a home equity loan. [Source: "Auto Industry Feels the Pain of Tight Credit," The New York Times, May 27, 2008.] The ongoing process of new-car purchases in California can be viewed as an infinite population Define p as the proportion of the population of new-car purchases in California...
c-f
on
this page
We were unable to transcribe this imagee) Deseribe the probabuiity histogram (symmetry, shape, center And the mean of this discrete random variable, Х. (Reminden This is asking you to find the mean or a random variable. .not a sample mean.) Show your 二つ、 e) Find the standard deviation of the random variable, X. (Reminder: This is asking you to find the standard deviation of a random variable...not a sample standard deviation.) Keep EXACT fractions throughout the...
Most questions answered within 3 hours.
-
Write a program to score the paper-rock-scissor game. Each of
two users types in either P,R...
asked 12 minutes ago -
Calculate the equillibrium constent K for a redox reaction that
has E°cell = -.98 V at...
asked 24 minutes ago -
A concave spherical mirror has a radius of curvature of
magnitude 19.6 cm.
(a) Find the...
asked 25 minutes ago -
3. draw a diagram of the magnetic field:
a. around a long straight wire with a...
asked 24 minutes ago -
If you titrated 30.0 mL of 0.1 M HCl with 0.1 M NaOH, indicate
the approximate...
asked 33 minutes ago -
NADH passes electrons into the electron transport chain. List
the carriers that would receive the electrons,...
asked 41 minutes ago -
A cylindrical cable with a resistivity of 1.6x10-8 Ω·m and cross
sectional area of 3x10-5 m^2...
asked 41 minutes ago -
True or False.
A consumer with convex preferences who is indifferent between
the bundles (5,2) and...
asked 44 minutes ago -
A diamond's index of refraction for red light, 656 nm, is 2.410,
while that for blue...
asked 57 minutes ago -
Compare HPLC, SPE, and GC. Identify the differences, the
advantages, and the weaknesses of each method.
asked 58 minutes ago -
Characteristic x-rays emitted by potassium have a wavelength of
0.374 nm. What is the energy of...
asked 1 hour ago -
there is a function to create two random numbers between 1 and
25 and a function...
asked 1 hour ago