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In: Statistics and Probability
Iphone users: randomely selexts 16 individuas. The sample average is $1100. Hte sample standard deviation is...
Iphone users: randomely selexts 16 individuas. The sample average is $1100. Hte sample standard deviation is $400
To study Android users you collect data on 25 randomly chosen people. The sample average for Android users is $850. The sample standard deviation is $350. Google executives believe they should charge the same amount for Pixel as Apple charges for its iPhone products. Test the hypothesis that the price iPhone users would pay for an iPhone is the same as the price of an Android user would pay for the phone. Google uses alpha 5%.
Solutions
orchestra answered 2 years agoRelated Solutions
The average battery life os an iPhone X is μ=9.52 hours with a standard deviation of...
The average battery life os an iPhone X is μ=9.52 hours with a
standard deviation of σ =1.86 hours.
a) What is the probability that a single iPhone X lasts less
than 9.25 hours?
b) What is the probability that a sample of 50 iPhone X phones
lasts more than 10 hours?
c) What is the probability that a sample of 50 iPhone X phones
lasts between 9.25 and 10 hours?
A statistician selected a sample of 16 accounts receivable and determined the sample standard deviation of...
A
statistician selected a sample of 16 accounts receivable and
determined the sample standard deviation of $400. she reported that
the sample information indicated the mean of the population ranges
from $4739.80 to $5260.20. she did NOT report what confidence
coefficient she had used. determine the confidence coefficient that
was used.
a. find the mean of the confidence interval
b. find the margin of error
c. using the information find the confidence coefficient
(level)
In a sleeping laboratory, 16 volunteers sleep an average of 7.2 hours, with a standard deviation...
In
a sleeping laboratory, 16 volunteers sleep an average of 7.2 hours,
with a standard deviation of 1.2 hours. What would be a 90%
confidence interval estimate for the mean number of hours that
people sleep at the night?
Find the sample variance and standard deviation. 23, 16, 3, 8, 11
Find the sample variance and standard deviation. 23, 16, 3,
8, 11
Find the sample variance and standard deviation. 23, 16, 3, 8, 11
Find the sample variance and standard deviation. 23, 16, 3,
8, 11
A sample of 16 toy dolls had a mean weight of 71.5 and a standard deviation...
A sample of 16 toy dolls had a mean weight of 71.5 and a
standard deviation of 12 pounds, respectively. Assuming normality,
construct 95% confidence interval for the population mean weight,
μ.
A sample of university students has an average GPA of 2.78 with a standard deviation of...
A sample of university students has an average GPA of 2.78 with
a standard deviation of 0.45. If GPA is normally distributed, what
percentage of the students has GPAs…..
More than 2.3?
Less than 3.0?
Between 2.00 and 2.5?
1. A sample of 96 observations showed an average of 25 and a standard deviation of...
1. A sample of 96 observations showed an average of 25 and a
standard deviation of 16. Construct the 90% confidence interval for
the population mean. What is the lower limit of this interval?
NOTE: WRITE YOUR ANSWER USING 4 DECIMAL DIGITS. DO NOT
ROUND UP OR DOWN.
2. In a recent poll, from a sample of 140 likely voters, 65
answered they approve the way the president is handling his job.
Compute the upper limit of the 95% confidence...
determine (1) % Fe in unknown sample (2)average % Fe (3)standard deviation (4)relative standard deviation For...
determine (1) % Fe in unknown sample
(2)average % Fe
(3)standard deviation
(4)relative standard deviation
For gravimetric determination of Iron as Fe2O3, how do I
calculate?
weighed sample of unknown containing Fe to produce ~0.3g of
Fe2O3 (~0.6 - 1 g of unkonwn)
I got 0.75g from unknow sample.
I got 0.05g from Fe2O3 collected from unknow.
A population has mean μ = 16 and standard deviation σ = 1.5. A random sample...
A population has mean μ = 16 and standard deviation σ = 1.5. A
random sample of size n = 49 is selected. What is the probability
that the sample mean is greater than 16.8?
I got 3.73 for z-value.
Please help
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