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Yuri [45]
3 years ago
5

Chin researched the amount of money 150 students earned per month from jobs held during the summer. He created a table of six sa

mple means from his collected data. Sample Number Sample Mean ($) 1 208 2 235 3 245 4 207 5 205 6 210 Using his results, what is a valid prediction about the mean of the population?
Mathematics
2 answers:
dem82 [27]3 years ago
8 0

the choices are below

the predicted mean of the population will be less than 200.

The predicted mean of the population will be less than 245.

The predicted mean of the population will be more than 275.

The predicted mean of the population will be more than 250.

b is the answer

likoan [24]3 years ago
3 0

Answer:

the predicted mean will be less than 245

Step-by-step explanation:

For ungrouped data

mean can be calculated using formula

sum of all observations/total no of observations

For grouped data

mean (x)= £f(x)/n

n represents the frequency

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A line goes through the points (1,8) and (9,12) what is the slope of the line? <br>Plz explain
Igoryamba

Answer:

2/3 or 0.67

Step-by-step explanation:

Slope = y2 - y1 /x2 - x1

Given

x1 = 1

y1 = 8

x2 = 9

y2 = 12

Slope = 12 - 8 /9 - 1

= 4/6

Reduce is by 2

2/3

Or

0.67

8 0
3 years ago
Ava is in charge of bringing bottled water to a party that has 42 guests.
olya-2409 [2.1K]

Answer:

a - about 3 packs cause you have to round up

b - $50.76

Step-by-step explanation:

First you divide 42 and 18.

42/18=2.33

You have to round up cause you can't have half of a pack, you can't just buy half of a pack.

So, it is rounded to 3 packs.

Next you have to multiply the number of packs and the cost of each pack of water bottles.

16.92*3=$50.76

a - you have to buy 3 packs

b - the total cost is $50.76

8 0
3 years ago
Find the percent of increase from 80$ to 90$
Ivan

Answer: 12.5%

Step-by-step explanation:

80x 12.5%=10

80+10=90

7 0
2 years ago
Read 2 more answers
Last week, Tina worked 40 hours in 4 days. She worked the same number of hours each day. How many hours did she work each day? W
blsea [12.9K]

She works 10 hour per day

3 0
3 years ago
It is estimated that 30% of households own a riding lawn mower. A sample of 17 households is studied. What is the standard devia
alina1380 [7]

Answer:

1.89 is the standard deviation of households who own a riding mower

Step-by-step explanation:

Let the random variable X denote the number of households owning a riding lawn mower. From the given information, X will be a Binomial random variable with parameters; n = 17 and  p = 30% = 0.3

The standard deviation of X;

\sqrt{n*p*(1-p)}

\sqrt{17*0.3*(1-0.3)} =1.89

7 0
3 years ago
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