The five-number summary for the number of surfers at each beach in Miami is shown in the following table.
2 answers:
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Let the number of nickels be = n
Let the number of dimes be = d
Let the number of quarter be = q
Total money William has = $12.80
As given, there are 3 times as many quarters as nickels
And 20 more dimes than nickels
As total money is $12.80
Putting the values of 'q' and 'd' to find 'n'
Hence the number of nickels are = 12
If you want to also find dime and quarter, then
Answer:
As p-value = 0.0.68 > 0.05 the null hypothesis could not be rejected
Step-by-step explanation:
The computation of the p-value is shown below:
Given that
Average life = = 88.5
Standard deviation = = 9
Sample = n = 80
Based on the above information
Null and alternative hypothesis is
Now for the level of significance = 0.05 and the critical value for a right talied test is
Now the test statistic is
= 1.491
Now it is observed that
Z = 1.49≤z_ c = 1.64
So by this the null hypothesis could not be rejected
So,
P -value = 1 - P(z<1.491)
P-value = 0.068
As p-value = 0.0.68 > 0.05 the null hypothesis could not be rejected