Answer:
x=0.5 or u cann putt x=1/2
Answer:
B
Step-by-step explanation:
k=13
Step-by-step explanation:
180 =(4k-7) + (3k+6) +90
180= 7k+89
-89 -89
91= 7k
÷7 ÷7
k=13
Answer:
-11
Step-by-step explanation:
Because -2+(-9)=-2-9=-11.
Answer:
a
The null hypothesis is
The alternative hypothesis
b
The 95% confidence interval is
Step-by-step explanation:
From the question the we are told that
The population mean is
The sample size is n = 30
The sample mean is
The standard deviation is
Given that the confidence level is then the level of significance is mathematically represented as
=>
Next we obtain the critical value of from the normal distribution table
The value is
Generally the margin of error is mathematically represented as
substituting values
The 95% confidence interval confidence interval is mathematically represented as
substituting values