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2 years ago

Which is the graph of y = -3?

Mathematics

1 answer:

Vilka [71]2 years ago

7 0

The first option because y is up and down and it’s negative 3

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bezimeni [28]

Label the x-axis “Solo Practice Time (min)” and the y-axis “Number of baskets”.

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Next, graph the points on the graph

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3 years ago

Patrica has $425.82 in her checking account. How much does she have in her account after she makes a deposit of $120.75 and a wi

aliya0001 [1]

Answer:

$360.67

Step-by-step explanation:

You would take $425.82 and add her deposit of $120.75 to get $546.57. Next you would the the $546.57 and subtract her withdrawl of $185.90 which will give you $360.67.

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3 years ago

Whats gucci someone plesee

sammy [17]

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3 years ago

Read 2 more answers

A random sample of 9 wheels of cheese yielded the following weights in pounds has a sample mean of 20.90 and a sample variance o

Ronch [10]

Answer:

$2.002 \leq \sigma^2 \leq 11.365$

Step-by-step explanation:

1) Data given and notation

s represent the sample standard deviation

$s^2$ represent the sample variance

n=9 the sample size

Confidence=90% or 0.90

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population mean or variance lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

The Chi Square distribution is the distribution of the sum of squared standard normal deviates .

2) Calculating the confidence interval

The confidence interval for the population variance is given by the following formula:

$\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}$

On this case we need to find the sample standard deviation with the following formula:

$s=sqrt{\frac{\sum_{i=1}^9 (x_i -\bar x)^2}{n-1}}
The sample variance given was [tex]s^2=3.45$

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

$df=n-1=9-1=8$

Since the Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical values.