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saul85 [17]
2 years ago
7

did americans work less than 40 hours a week on average in 1984? in 1984, the gss included questions about the number of hours t

hat the respondent worked per week. the average number of hours worked per week was 36.63 hours with a standard deviation of 13.23 hours. a sample of 34 respondents was questioned. find the test statistic.
Mathematics
1 answer:
Aliun [14]2 years ago
5 0

Answer:

878 gas

Step-by-step explanation:

89=5=7=9

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Which trigonometric ratios are correct for triangle ABC? Check all that apply.
Alina [70]
Assuming the - are bullet points and not negative signs:
sin = opposite/hypotenuse
cos = adjacent / hypotenuse
tan = opposite / adjacent. 
Also remember the special properties of the 30 - 60 - 90 triangle. 
This tells us that side AB = 9√3

Combining this info:
sin (C) = 9√3  ÷ 18  = √3 ÷ 2<span>
cos(B) = 9 </span>√3 ÷ 18 = √3 ÷ 2<span>
tan(C) = 9 </span>√3 ÷ 9 = √3<span>
sin(B) = 9 </span>÷ 18 = 1/2<span>
tan(B) = 9 </span>÷ 9√3 = 1 / √3 = √(3) ÷ 3
5 0
3 years ago
At a college the scores on the chemistry final exam are approximately normally distributed, with a mean of 75 and a standard dev
AysviL [449]

Answer:

b) Chemistry

Step-by-step explanation:

To compare both scored we need to standardize the scores using the following equation:

\frac{x-m}{s}

Where x is the score, m is the mean and s is the standard deviation. So, 82 on chemistry is equivalent to:

\frac{82-75}{15}=0.4667

Because the mean of the scores on the chemistry final exam is equal to 75 and the standard deviation is 15

At the same way, 80 on Calculus is equivalent to:

\frac{80-83}{13} =-0.2308

Because the mean of the scores on the calculus final exam is equal to 83 and the standard deviation is 13

Now, we can compare the values. So, taking into account that -0.2308 is lower than 0.4667, we can said that the student do better in Chemistry.

5 0
2 years ago
Helen plays basketball. For free throws, she makes the shot 75% of the time. Helen must now attempt two free throws. The probabi
CaHeK987 [17]

Answer: 0.6375

Step-by-step explanation:

Let's assume that the event that she'll make the first shot is given as P(A) while making the second shot is P(B). Therefore, P(A/B) = 0.85

Therefore, the probability that she makes both free throws will be denoted as:

= 0.75 × 0.85

= 0.6375

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3 years ago
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Solving for the missing variable
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The graph shows the relationship between the number of granola bars and amount of calories per bar.
castortr0y [4]

part a y= x × 100

Step-by-step explanation:

1 bar is 100 calories so you would times it by 100 for every bar

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3 years ago
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