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Anettt [7]
3 years ago
7

Test scores were recorded for students in a statistics class. The scores for the first test had a standard deviation of 3.8 poin

ts. The scores from the second test had a standard deviation of 4.8 points. Choose the correct statement below.
1. The average test grade rose by 1 point
2. The scores of the second test were closer together than the first
3. The higher standard deviation of the second test indicates higher average scores on the second test than on the first
4. None of the above are true
Mathematics
1 answer:
Bond [772]3 years ago
3 0

Answer:

Step-by-step explanation:

The higher standard deviation of any data represents diversified data or data having more scattered value . Average value may be same for two samples of data having different standard deviation . So option one is incorrect. 3 rd option is also incorrect.

The scores of the second test were more widespread  than the first , because its standard deviation is more for second test. option 2 is in- correct .

none is correct.

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9. Triangle Construction pays Square Insurance $5,980
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The triangle pay $32 more for that day than it paid per day during the first period of time.

Step-by-step explanation:

The given is,

              Triangle Construction pays Square Insurance $5,980

               To insure a construction site for 92 days

               To extend the  insurance beyond the 92 days costs $97 per day

               Triangle extends the insurance by 1 day

Step:1

              Insurance per day from the 92 days period,

                                                                           = \frac{Total insuratio for 92 days}{Period}

               Where, Total insurance for 92 days = $ 5,980

                                                               Period = 92 days

               From the values, equation becomes,

                                                                            =\frac{5980}{92}

                                                                           = $ 65 per day

Step:2

              Insurance per day after the 92 days,

                                                                           = $ 97

               Amount Pay for that day than it paid per day during the first period of time,

                                                                            =(97-65)

                                                                           = $32

Result:

             The triangle pay $32 more for that day than it paid per day during the first period of time, if  the Triangle Construction pays Square Insurance $5,980 to insure a construction site for 92 days and to extend the  insurance beyond the 92 days costs $97 per day.

                                                                         

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