Each person who applies for an assembly job at Robert’s Electronics is given a mechanical aptitude test. One part of the test involves assembling a plug-in unit based on numbered instructions. A sample of the length of time it took 42 persons to assemble the unit was organized into the following frequency distribution. Length of Time (in minutes) Number 1 up to 4 4 4 up to 7 8 7 up to 10 14 10 up to 13 9 13 up to 16 5 16 up to 19 2 What is the standard deviation (in minutes)? 17.00 6.01 3.89 8.78

Answer:

3.89 minutes

Step-by-step explanation:

Firstly, we have this in a table using the range

There are 6 ranges

We put the frequency alongside

Afterwards we calculate the midpoint of the range

For example, midpoint of range 1-4 is (1+4)/2 = 5/2 = 2.5

We multiply the midpoint by the frequency which gives another column

Then we calculate the mean, where the mean is the summation of all frequencies and their midpoints

We subtract each midpoint from the mean, square the results, then multiply each by their frequency

Lastly, we apply the standard deviation formula

Please check attachment for the tabular representation and formulas

I need G PLZZZZZZZZZZZZZZZ

(66 POINTS)

Lara is trying to solve a puzzle where she has to figure out two numbers, x and y. Five times x is greater than or equal to 3 more than y. Also, 1 more than 4 times y is greater than twice x. Which graph represents the possible solutions?

1. Find the 8th term of the following linear sequences.
i) 2,4,6,8,...
ii) -7,-4,-1.2- iii)0,-1/2,-1,-1 1/2
iv) 12,5,-2. v) 8,14, 20,...
vi) 63,58, 53, ...​

POINTS! PLEASE HELP!!! SUPER EASY AND FAST!! I WILL GIVE BRAINLIEST!!

Write an equation of a line that has a slope of "negative one-half" in each form: a) point-slope form
b) slope-intercept form.
Describe how linear data given in a table can help you write an equation of a line in slope-intercept
form.

Pls see attachment

x²-x-6
What is hcf of the polynomial

Interest of $1,632 with principal of $16,000 for 306 days (ordinary interest) results in a rate of​

-3x - 8 = 10
Usatestprep

What is the percent of decrease from 600,000 to 60,000? Write your answer using a percent sign (%).​

Which set of ordered pairs represents y as a function of x ?
F {(0,0), (-1,2), (-1,-2), (-2,4), (-2,-4)}
G {(0,0), (1,1), (2,4), (3,9), (3,16)}
H {(0,0), (0,1),(0,2), (0,-1), (0, -2)}
J {(0,0), (-1,-0.5), (-2,-1), (-3,-1.5), (-4,-2)}

Forced vital capacity (FVC), a standard measure of pulmonary function, is the volume of air a person can expel in 6 second. The standardized FVC follows approximately a standard normal distribution. A child is considered to have a normal long growth if his or her standardized FVC is within 1.5 standard deviation of the mean. The probability that a child is within the normal range of long growth is ______________.

Given triangle GHJ, the measure of angle G equals 110°, the measure of angle J equals 40°, and the measure of angle H equals 30°. Complete the following statements. Since angle G is angle, the opposite side, JH, is . The order of the side lengths from longest to shortest is .

Does anyone know the answers to I-ready ( Math Lvl F: Understanding Algerbretic Expressions)

Thank You

Please help, will give brainliest. Evaluate each expression for the given value of the variable(s). And Explain, Please.


3d - 4

d = 1.2

SHOW
YOUR
WORK!!
X -
-67 V6 ²-4ac
2a
The
equation d = n²-12n + 43
models the number of defective
items a produced in a manufacturing process where there are
workers in a restricted
area
a) solve for
n
When
d=30
INTL
DLL

WILL GIVE BRAINLISEST

Joseph loves the Tennessee Titans, so his mother decides to buy
him a Titans cake for his birthday. If the cake cost $ 35.00
before taxes and $ 37.10 after taxes, please and answer
the following questions:
$ 35
1. How much will Joseph's mom pay in taxes?
2. By setting up a percent proportion, determine the percent tax rate.
(The "of" is the price of the cake before taxes and the "is" is the amount of taxes.)
is
of
100

Find difference. Feel free to use a number line to help you choose the best answer. Write your answer
as a decimal.
-1.7-(-0.8)

Mauricio scored a total of 34.42 points in five gymnastic
events. Which number sentence shows the best way to
estimate Mauricio's score for each event?
(a) 35 = 5 = 7
(b) 35 - 7 = 5
(C) 30 = 10 = 3
(d) 40 = 10 = 4
Answer choice:
Explain how you chose your answer.

a number s is at least -2 or less than -6 (how will it be graphed on a number line?)

3. Leeland can eat 1 hotdog in 20 minutes. What is his unit rate in hotdogs
per hour?

A 1/2 a hotdog per hour
B 1 hotdogs per hour
C 2 hotdogs per hour
D hotdogs per hour

Money is put into two accounts. Account A earns 3.5% interest annually, and account B eanrs 2.6% interest annually. Assuming $20,000 is split evenly among the accounts and interest is not compounded, how much interest would be earned in total after 6 years?

What is 82.403 rounded to the nearest whole number​

if a,b,c,d are in continuous proportion then prove that (c+a) (c+d) = (b+c) (b+d)​

Don't worry gotten it

Write the ratio as a fraction in simplest form, with whole numbers in the numerator and denominator.

4.9 mi to 2.8 mi

PLSS HELPP FOR 20 POINTS!!

SPARK in Dallas requires a school to send 2 adults for every 20 students who visit for a field trip. If a school send 13 adults, how many students can go
on the trip

Tina wants to run 123 miles over
7 days. She wants to run the same
distance each day. How far must she
run each day?

Select the statement that indicates that the triangles in each pair are congruent.
50 points

reduce 384 by 25%
i neeeed help