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Recent questions in High school statistics

A flowerpot accidentally falls off the window of a condominium unit. Your unit is located below where the flowerpot had fallen. Your window measures to be 1.60 m tall, and the time it takes the flowerpot to move past your window is 0.150 s (from the top part to the bottom part of the window). How high from the top of your window did the flowerpot fell off?

FobelloE 2021-10-15

Seven women and nine men are on the faculty in the mathematics department at a school.
a) How many ways are there to select a committee of five members of the department if at least one woman must be on the committee?
b) How many ways are there to select a committee of five members of the department if at least one woman and at least one man must be on the

FizeauV 2021-10-13

Statistics from Cornell's Northeast Regional Climate Center indicate that Ithaca, New York, gets an average of 35.4" of rain each year, with a standard deviation of 4.2". Assume that a Normal model applies. 1) During what percentage of years does Ithaca get more than 40" of rain? 2) Less than how much rain falls in the driest 20% of all years? 3) A Cornell University student is in Ithaca for 4 years. Let $\overset{―}{y}$ represent the mean amount of rain for those 4 years. Describe the sampling distribution model of this sample mean, $\overset{―}{y}$ . 4) What 's the probability that those 4 years average less than 30" of rain?

beljuA 2021-10-09

Discuss the co efficient of variation also writedown why we use coefficient of variance

Reeves 2021-10-04

z-scores can be used to identify ?, ?, ? values.

slaggingV 2021-10-04

Explain TWO strengths in using mean as a measure of central tendency.

Haven 2021-10-03

Make a scatterplot of the data. Use 87 for 1987.

$\begin{array}{cc} Year & Sales & (millions of dollars) \\ 1987 & 300 \\ 1988 & 345 \\ 1989 & 397 \\ 1990 & 457 \\ 1991 & 510 \\ 1992 & 587 \\ 1993 & 664 \\ 1994 & 700 \\ 1995 & 770 \\ 1996 & 792 \\ 1997 & 830 \\ 1998 & 872 \\ 1999 & 915 \end{array}$

Daniaal Sanchez 2021-10-02

The one figure you would request from the given three figures if you are applying for an entry-level job at the large firm and informed of the mean, or mode salary.

iohanetc 2021-09-30

Explain the additional measure of central tendency would be appropriate to report with these data based on their findings.

ediculeN 2021-09-30

a. The range of WR scores that would contain about 95% of the scores in the drug dealer sample.
Given info:
The data have mount-shaped, symmetric distribution.
$n = 100, \overset{―}{x} = 39, s = 6$ .
b. The proportion of scores that lies above 51.
c. The range of WR scores that contain nearly all samples of drug dealer sample.

nitraiddQ 2021-09-30

Your son has just gotten his driver's license and your bank account is about to get a little (a lot?) lighter. To help mitigate the impact on your finances, you have opted for a high deductible auto insurance policy. The deductible on your policy is $4000, which means that you will pay the first $4000 of any damages and then the insurance will cover the rest. Because of this, if there is an accident for which the damages are less than $4000, you aren't even going to file a claim with the insurance company. The less they know, the better? You will just pay it out of pocket. You believe that any accident will result in a damage amount which is normally distributed with a mean of $4500 and a standard deviation of $1500. The value of your son's car is only $7500, so that is the upper bound on the damage amount because in that case, you can junk the car and buy a different one for $7500. The lower bound on damages is obviously $0. The probability of an automobile accident this year is 7.5%.
Build a Monte Carlo simulation model to show your out of pocket expenses in this situation. If there is no accident, then there is no out of pocket expense.
Analyze the results of the 1000 iterations to find the following as a percentage of the 1000 interactions:
1. How often a claim was filed (damage met deductible).
2. How often you ended up buying a different car.
Also, calculate your expected out of pocket expense.
For these three questions, put a cell reference in Cells B4:B6 to wherever you have calculated those values in your spreadsheet so that I don't have to hunt for them.

Wierzycaz 2021-09-29

1) What does a z-score indicate?
2) What are the three major uses of z-scores with individuals scores?

glasskerfu 2021-09-29

To determine and explain: Which data entries are unusual and very unusual.
Given info:
The mean speed and standard deviation for a sample of vehicles along a stretch of highway are 67 miles per hour and 4 miles per hour, respectively. Also, the speeds for eight vehicles are as follows:
70,78,62,71,65,76,82,64

sagnuhh 2021-09-28

A privately owned liquor store operates both a drive-in facility and a walk-in facility.
On a randomly selected day, let X and Y, respectively, be the proportions of the time that the drive-in and walk-in facilities are in use, and suppose that the joint density function of these variables is
$f (x, y) = {\begin{cases} \frac{2}{3} (x + 2 y) & 0 \leq 1.0 \leq y \leq 1 \\ 0, & e l s e w h e r e \end{cases}$
0, elsewhere.
a. Find the marginal density of X.
b. Find the marginal density of Y.
c. Find the probability that the drive-in facility is busy less than one-half of the time.

Haven 2021-09-26

Do most researchers still insist on at least interval level of measurement as a condition for the use of parametric statistics?

Wierzycaz 2021-09-26

The following two-way table displays information about favorite sports cars that resulted from a survey given to all students at Shore High School.

$\begin{array}{cc} Corvette (C) & Porsche (P) & Ferrari (F) & Total \\ Boys (B) & 90 & 60 & 120 & 270 \\ Girls (G) & 110 & 141 & 79 & 330 \\ Total & 200 & 201 & 199 & 600 \end{array}$

What is the probability that a randomly selected student from this school is a boy?

Globokim8 2021-09-24

Using the daily high and low temperature readings at Chicagos

iohanetc 2021-09-24

a. Organize costs as an ordered array.
b. Construct the frequency distribution and percentage distribution for the given data.
c. Explain that the basketball game is concentrated around which class group.

glamrockqueen7 2021-09-24

Whether the statement is true or false "There is not one particular frequency distribution that is correct, but there are frequency distributions that are less desirable than others."

tricotasu 2021-09-24

ACTIVITY G: Continuous Probability Distributions
1. The data records the length of stay of engineering students in the university. We will assume a uniform distribution between 5 to 7 years, inclusive. What is the probability that a randomly chosen engineering student will stay at most 6 years?

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