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A random sample of 150 workers with children in day care shows a mean day care cost Rs. 3200 and a standard deviation of Rs. 750. Verify the department’s claim that the mean does not exceeds Rs. 3000 at 5% level of significance with this information. Explain your results in your own words.
find the estimate for the mean the variance and the standard deviation of the salaries of all the professors in all schools at the university belt area
A random sample of 150 workers with children in day care shows a mean day care cost Rs. 3200 and a standard deviation of Rs. 750. Verify the department’s claim that the mean does not exceeds Rs. 3000 at 5% level of significance with this information.
A random sample of 150workers with children in day care shows a mean dry care of cost Rs 3200 and a standard deviation of Rs 750.Verify the department's claim that the mean does not exceeds Rs 3000 at 5% level of significance with this information.
Picking at the same time 6 cards from a standard deck of playing.
Find the following probability:
a) At least 2 king cards
b) None of the cards ace
c) At most 4 black cards
d) All cards are red
this is the homework please email me the answers back asap
thanks.
Suppose that 3000 drivers in Wakanda were randomly breath-tested on 21 April 2019 and 116were above the limit of 0.05 blood-alcohol level. On the 15May 2019 ,4000deivers were tested and 98 were above this level. What additional information would you require before trying to draw a conclusion from the data?
The National Center for Education Statistics surveyed 4400 college graduates about the lengths of time
required to earn their bachelor’s degrees. The mean was 5.15 years and the standard deviation was 1.68
years. Based on the above information, construct a 95% confidence interval for the mean time required to
earn a bachelor’s degree by all college students.
The critical value (t*) is ____________________ (use the infinity row ∞
∞ for your degrees of freedom)
The National Center for Education Statistics surveyed 4400 college graduates about the lengths of time
required to earn their bachelor’s degrees. The mean was 5.15 years and the standard deviation was 1.68
years. Based on the above information, construct a 95% confidence interval for the mean time required to
earn a bachelor’s degree by all college students.
The confidence level is ________________%
The National Center for Education Statistics surveyed 4400 college graduates about the lengths of time
required to earn their bachelor’s degrees. The mean was 5.15 years and the standard deviation was 1.68
years. Based on the above information, construct a 95% confidence interval for the mean time required to
earn a bachelor’s degree by all college students.
The sample size (n) is _____________________
The number of accidents in a highway as recorded every month over a 9 month period are 15,18,9,11,14,10,8,13,19. Test at 5% frequencies are in in agreement with the belief that the number of accidents was the same during the 9 months. it is given that the table values of x² at 5% level for 8 d.o.f. are 15.5 and 16.9 respectively.
