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Find the sample mean page views for each website. Find the estimated difference of the sample man(y1-y2), page views of the two websites
If the distribution is approximately normal, the t-test is a more powerful test about the central tendecy of the distribution than the sign test. True or false?
The standard error is 14 grams. The samp dist. for the sample mean is normal with a mean of 110 grams and SD of 14 grams. The samplling distribution for the sample mean is 110 grams.
Of the 23 stocks that the young investor bought over the last 12 months, 13 have increased. Can he claim that is bes better at predicting increases than the typical portfolio manager? Test at a=.05
Write the complex number z =-8 + 4 i in polar form: z = r( \cos \theta + i \sin \theta) where r = and \theta = The angle should satisfy 0 \le \theta < 2\pi.
As we have noted in previous chapters, even a very small effect can be significant if the if the sample is large enough. For each of the following, determine how large a sample is necessary for the
After posting the flags at all such sites, she obtains a random sample of 25 golfers whose mean was 81 with s = 5.73. Do the flags improve the golf scores? Use ?=0.05. Please show all 5 steps of the
Does participation in company decisions have an effect on productivity? Use ? = 0.01. Please show me the steps to work with problem and what hypotheses test do you use to solve.
find the minimum smples size needed, using a prior study that found that 42% of the respondents said they have high speed internet access.
A federal report indicated that 24% of children under age 6 live in poverty in Georgia, an increase in previous years. How large a sample is needed to estimate the true proportion of children within
Determine the residuals and predicted values. Does it appear that the normality requirement is violated? Explain.
The Survey of Study Habits and Attitudes (SSHA)is a psychological test designed to measure the motivation, study habits, and attitudes toward learning of college students. These factors, along with
In the last decade, society in general and the judicial system in particular have altered their opinions on the seriousness of drunken driving. In most jurisdictions, driving an automobile with a bl
Betting on the results of National Football League games is a popular North American activity. In some states and provinces, it is legal to do so provided that wagers are made through a government-a
In many cities, the network national news is broadcast at 6:30 or 7:00 p.m. In most cities, the national news is preceded by local news in the late afternoon or early evening.
Suppose IQ scores were obtained from randomly selected siblings. For 20 such pairs of people, the linear correlation coefficient is 0.936 and the equation of the regression line is Y^=-22.06+1.23x,
At a batter testing facility, if at least 2 of the 20 batteries tested indicate low voltage, the entire lot will be rejected. Find the probability that a lot will be rejected if 8% of the batteries
The machine that fills bottles is fairly precise. The distribution of the number of ounces of water in the bottles is normal with a standard deviation of 0.06 ounces. The mean is supposed to be 16 o
Scores are normally distributed with a mean of 100 and a standard deveiation of 15. The graph is right side 0.6 , i need the indicated iq score x.
If this branch of military changes the height requirements so that all women are eligable except the shortest 1% and the tallest 2% what would the new height requirements be. The % of women who meet
Consider a hypohesis test that uses a 0.05 significance level to test the claim that the mean weight of all jellybeans is equal to 0.8575 g (the weight necessary so that bags of jellybeas have the w
If np >5 and nq>5, estimate P(more than 5) with n=13 and p=0.7 by using the normal distribution ; if np<5 or nq<5, then state the normal approximation is not suitable. P(more than 5)= pl
The number of gallons of paint that Home Depot sells in a given day is normally distributed with a mean of 230 gallons and a standard deviation of 28 gallons (I realize that the distribution is prob
What is the expected number of tosses until the pattern HT appears for the first time? Hint: break this calculation into 2 pieces: the expected amount of time you have to wait until H appears, and t
Is there a linear correlation between chest size and weight? What proportion of the variation in weight can be explained by the linear relationship bwteen weight and chest size? ( round to three dec