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Fofino [41]
3 years ago
5

Cliff wants to determine whether people prefer red apples or green apples. In order to obtain good results, he decides to conduc

t this survey at a car festival. Out of the 5000 people who attended the festival, Cliff surveys 10 attendees randomly. The survey reads, "Which do you prefer, red apples or green apples" Seven of ten people surveyed answer that they prefer red apples. From his survey, Cliff concludes that most people prefer red apples. Cliff's results may not be reliable because of _____________ problems with his study?
Mathematics
1 answer:
Alex17521 [72]3 years ago
4 0

Answer:

Small sample size.

Step-by-step explanation:

The problem with Cliff's survey is that his sample size is too small. 10 out of 5,000 people represent only 0.2% of the population that attended the festival, which is too small of a sample for a reliable study.

Furthermore, since Cliff's question was to determine whether people, in general, prefer red apples or green apples, the sampling of only people who attended the festival might no be adequate.

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(-3√ -81)(-5+√ -9)+9i
AnnyKZ [126]

Answer:

144i + 81

Step-by-step explanation:

(-3*9i)(-5 + 3i) + 9i

-27i (-5 + 3i) + 9i

FOIL

135i + 81 + 9i

144i + 81

5 0
3 years ago
Identify which of the following are rational numbers. A. −5 B. √12 C. 4 3 ⁄ D. 0.523523 … E. 4.1389467 … F. √25 16 ⁄ G. 27 H. 9.
Gennadij [26K]
A. C. D. F. G. H. That is the answers
5 0
3 years ago
If the side of a rectangular prism is doubled, how would this affect the area? How about the volume?
professor190 [17]

Answer:

Step-by-step explanation:

The area will be increased by 4 times  and volume will be increased by 8 times

Area of rectangular prism = 2 (lb+bh +hl)

When sides are doubled, Area = 2 (2l * 2b +2b *2h + 2h*2l)

                                                     = 4 * 2 (lb+bh +hl)

Volume  of rectangular prism = lbh

When sides are doubled,  Volume = 2l * 2h * 2b = 8 lbh

6 0
3 years ago
I did the rest of the problems but I’m stuck on this problem. ( find the surface area)
Mekhanik [1.2K]

Answer:

135.42 square feet

Step-by-step explanation:

2 x triangle face +

2 x rectangular face +

1 x base = Surface Area

2 ( 1/2 * 3 * 4) +

2 ( 3.61 * 11) +

4*11 =

12 + 79.42 + 44 = 135.42 square feet

HOPE THIS HELPS!!!

7 0
2 years ago
Bastien, Inc. has been manufacturing small automobiles that have averaged 50 miles per gallon of gasoline in highway driving. Th
xenn [34]

Answer:

t=\frac{51.5-50}{\frac{6}{\sqrt{36}}}=1.5    

Now the p value for this case would be given by:

p_v =P(z>1.5)=0.0668  

Assuming a significance level of 0.05 or 5% we see that the p value is higher than the significance level we can conclude that we FAIL to reject the null hypothesis and we don't have enough evidence to conclude that the true mean is higher than 50 miles per gallon

Step-by-step explanation:

Information given

\bar X=51.5 represent the sample mean for the new small cars

\sigma=6 represent the population deviation

n=36 sample size  

\mu_o =50 represent the value to check

t would represent the statistic

p_v represent the p value for the test

System of hypothesis

We want to check if the new small cars average more than 50 miles per gallon in highway driving, the system of hypothesis are:  

Null hypothesis:\mu \leq 50  

Alternative hypothesis:\mu > 50  

Since the population deviation is given the the statistic is given by:

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}  (1)  

The statistic for this case is given by:

t=\frac{51.5-50}{\frac{6}{\sqrt{36}}}=1.5    

Now the p value for this case would be given by:

p_v =P(z>1.5)=0.0668  

Assuming a significance level of 0.05 or 5% we see that the p value is higher than the significance level we can conclude that we FAIL to reject the null hypothesis and we don't have enough evidence to conclude that the true mean is higher than 50 miles per gallon

6 0
3 years ago
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