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sesenic [268]
3 years ago
10

The following data represent the pulse rates? (beats per? minute) of nine students enrolled in a statistics course. Treat the ni

ne students as a population.
Complete parts ?(a) through? (c). Student Pulse ??

Perpectual Bempah 64 ??

Megan Brooks 77 ??

Jeff Honeycutt 89 ??

Clarice Jefferson 69 ??

Crystal Kurtenbach 89 ??

Janette Lantka 65 ??

Kevin McCarthy 88 ??

Tammy Ohm 69 ??

Kathy Wojdya 87

(a) Determine the population mean pulse. The population mean pulse is approximately nothing beats per minute. ?(Round to one decimal place as? needed.)

(b) Determine the sample mean pulse of the following two simple random samples of size 3. Sample? 1: StartSet Janette comma Clarice comma Megan EndSet Sample? 2: StartSet Perpectual comma Clarice comma Megan EndSet The mean pulse of sample 1 is approximately nothing beats per minute. ?(Round to one decimal place as? needed.) The mean pulse of sample? 2, is approximately nothing beats per minute. ?(Round to one decimal place as? needed.)

(c) Determine if the means of samples 1 and 2? overestimate, underestimate, or are equal to the population mean. The mean pulse rate of sample 1 ? (underestimates/ is equal to/ overestimates) the population mean. The mean pulse rate of sample 2 (is equal to/ underestimates/ or overestimates) the population mean.
Mathematics
1 answer:
aleksandr82 [10.1K]3 years ago
3 0

Answer:

a) population\hspace{0.1cm} mean = \frac{64 + 77 + 89 + 69 + 89 + 65 + 88 + 69 + 87}{9} = 77.44

b)sample\hspace{0.1cm} mean 1 = \frac{65 + 69 + 77}{3} = 70.3

   sample\hspace{0.1cm} mean 2 = \frac{64 + 69 + 77}{3} = 70

c) both the means of the two samples underestimate the population mean.

   the mean pulse rate of sample 1 underestimates the population mean.

   the mean pulse rate of sample 2 underestimates the population mean.

Step-by-step explanation:

i) population size, N = 9

a) population\hspace{0.1cm} mean = \frac{64 + 77 + 89 + 69 + 89 + 65 + 88 + 69 + 87}{9} = 77.44

b)sample\hspace{0.1cm} mean 1 = \frac{65 + 69 + 77}{3} = 70.3

   sample\hspace{0.1cm} mean 2 = \frac{64 + 69 + 77}{3} = 70

c) both the means of the two samples underestimate the population mean.

   the mean pulse rate of sample 1 underestimates the population mean.

   the mean pulse rate of sample 2 underestimates the population mean.

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Answer:

\large{ \tt{ -  \: HEY  \: AH~\:♡ }}

\large{ \tt{✺ \: SOLUTION}} :

  • Provided : Total sold bakery items : 3028 coffee buns and blueberry buns & 1560 more coffee buns were sold than the blueberry buns.

  • To find : Number of coffee buns the bakery sold

- First , Subtract 1560 from 3028 :

\large{ \tt{→ \: 3028 - 1560 = 1468}}

We just subtacted the number of more coffee buns from the number of told items sold which means that the number of coffee buns and the number of blueberry buns sold are equal for now. Now divide 1428 by 2 :

\large{ \tt{→ \frac{1428}{2} = 734 }}

Now - Let's get back to the second sentence of the question and add 734 & 1560 :

\large{ \tt{→ \: 734 + 1560 =  \large{ \boxed{2294}}}}

  • Hence , The bakery sold 2294 coffee buns.

- Hope this helps , oneesan! ;)

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Sarah needs 10 feet of fabric for a project she is working on, but the store only sells the fabric in meters. One meter of fabri
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<h2>Hello!</h2>

The answer is:

The fabric will cost $4.58

D.$4.58

<h2>Why?</h2>

Since it's a conversion exercise, we need to pay special attention to the conversion procedure.

From the statement we know that:

1ft=0.305m

So, if she needs 10 feet of fabric, we need to convert it to meters, and then, calculate its cost.

We have that:

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Now, we have that each meter of fabric cost $1.50, so, 3.05m of fabric will cost:

\frac{1m}{1.50(dollars)}=\frac{3.05m}{cost}\\\\cost=\frac{3.05m*1.50(dollars)}{1m}=4.575(dollars)=4.58(dollars)

Hence, we have that the cost of the fabric will be $4.58.

The correct option is: D.$4.58​

Have a nice day!

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